https://wiki.chc.ucsb.edu/index.php?title=CHIRTS_FAQ&feed=atom&action=historyCHIRTS FAQ - Revision history2024-03-29T15:15:46ZRevision history for this page on the wikiMediaWiki 1.34.0https://wiki.chc.ucsb.edu/index.php?title=CHIRTS_FAQ&diff=108565&oldid=prevSeth: /* Validation */2016-03-08T21:40:19Z<p><span dir="auto"><span class="autocomment">Validation</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>in terms of looking at the Alex maps I downloaded data from WorldClim (http://www.worldclim.org/current) they interpolate station data based on lat, lon, elevation. looks good. not a whole lot of stations in the sahara...</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>in terms of looking at the Alex maps I downloaded data from WorldClim (http://www.worldclim.org/current) they interpolate station data based on lat, lon, elevation. looks good. not a whole lot of stations in the sahara...</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File: worldclim_range.gif]]</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File: worldclim_range.gif]]</div></td></tr>
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</table>Sethhttps://wiki.chc.ucsb.edu/index.php?title=CHIRTS_FAQ&diff=108564&oldid=prevSeth: /* Validation */2016-03-08T21:39:42Z<p><span dir="auto"><span class="autocomment">Validation</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 21:39, 8 March 2016</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Oz validation http://www.bom.gov.au/climate/averages/tables/cw_015590.shtml [Alice Springs] really nice, you can make avg plots, then add a year. temp, # days w/ rain are good variables http://www.bom.gov.au/climate/averages/tables/cw_014015.shtml [Darwin] http://www.bom.gov.au/climate/averages/tables/cw_011003.shtml [Eucla] http://www.bom.gov.au/climate/data/index.shtml?bookmark=200&view=map [clickable map]</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Oz validation http://www.bom.gov.au/climate/averages/tables/cw_015590.shtml [Alice Springs] really nice, you can make avg plots, then add a year. temp, # days w/ rain are good variables http://www.bom.gov.au/climate/averages/tables/cw_014015.shtml [Darwin] http://www.bom.gov.au/climate/averages/tables/cw_011003.shtml [Eucla] http://www.bom.gov.au/climate/data/index.shtml?bookmark=200&view=map [clickable map]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">in terms of looking at the Alex maps I downloaded data from WorldClim (http://www.worldclim.org/current) they interpolate station data based on lat, lon, elevation. looks good. not a whole lot of stations in the sahara...</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[File: worldclim_range.gif]]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==where code resides in Linux==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==where code resides in Linux==</div></td></tr>
</table>Sethhttps://wiki.chc.ucsb.edu/index.php?title=CHIRTS_FAQ&diff=108562&oldid=prevSeth: /* Fixes to make */2016-03-04T23:33:18Z<p><span dir="auto"><span class="autocomment">Fixes to make</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 23:33, 4 March 2016</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>one of the first steps in the process involves generating a histogram, per-pixel, of all of the Tb values through time. then we identify erroneous high values that would lead to a higher than correct upper threshold. the first way we did this was to locate the end of the real histogram by finding 4 good values (bins with a count >10) in a row followed by two zeroes for the next bins. this breaks down in Siberia/Greenland/Antarctica and if the xxxxoo search string isn't found the histogram isn't modified, leaving some weird erroneous data points. I added 2 if statements to clarify things. if no xxxx00 then allow xxxxo. if not that, allow xxxxoo where x just has to be >0 rather than >10.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>one of the first steps in the process involves generating a histogram, per-pixel, of all of the Tb values through time. then we identify erroneous high values that would lead to a higher than correct upper threshold. the first way we did this was to locate the end of the real histogram by finding 4 good values (bins with a count >10) in a row followed by two zeroes for the next bins. this breaks down in Siberia/Greenland/Antarctica and if the xxxxoo search string isn't found the histogram isn't modified, leaving some weird erroneous data points. I added 2 if statements to clarify things. if no xxxx00 then allow xxxxo. if not that, allow xxxxoo where x just has to be >0 rather than >10.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>somehow record how many cloudy days (hours) were thrown out to get the temp value for a pixel for a month. use this to quantify uncertainty. i.e. december -- El Nino US west coast, India. might be an issue S Mex in summer, also S Mex jan-mar el nino years.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>somehow record how many cloudy days (hours) were thrown out to get the temp value for a pixel for a month. use this to quantify uncertainty. i.e. december -- El Nino US west coast, India. might be an issue S Mex in summer, also S Mex jan-mar el nino years. <ins class="diffchange diffchange-inline">Have a where statement where we apply threshH,L to the full mastrix. could add a count to that. might need to add a for loop for year. count would be #days x 5x5</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Validation==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Validation==</div></td></tr>
</table>Sethhttps://wiki.chc.ucsb.edu/index.php?title=CHIRTS_FAQ&diff=108559&oldid=prevSeth: /* Validation */2016-03-01T20:27:24Z<p><span dir="auto"><span class="autocomment">Validation</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>89.0N - 80.0S, 1.0E - 359.5E</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>89.0N - 80.0S, 1.0E - 359.5E</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Oz validation http://www.bom.gov.au/climate/averages/tables/cw_015590.shtml [Alice Springs] really nice, you can make avg plots, then add a year. temp, # days w/ rain are good variables http://www.bom.gov.au/climate/averages/tables/cw_014015.shtml [Darwin] http://www.bom.gov.au/climate/averages/tables/cw_011003.shtml [Eucla]</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Oz validation http://www.bom.gov.au/climate/averages/tables/cw_015590.shtml [Alice Springs] really nice, you can make avg plots, then add a year. temp, # days w/ rain are good variables http://www.bom.gov.au/climate/averages/tables/cw_014015.shtml [Darwin] http://www.bom.gov.au/climate/averages/tables/cw_011003.shtml [Eucla<ins class="diffchange diffchange-inline">] http://www.bom.gov.au/climate/data/index.shtml?bookmark=200&view=map [clickable map</ins>]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==where code resides in Linux==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==where code resides in Linux==</div></td></tr>
</table>Sethhttps://wiki.chc.ucsb.edu/index.php?title=CHIRTS_FAQ&diff=108547&oldid=prevSeth: /* Validation */2016-02-17T01:21:38Z<p><span dir="auto"><span class="autocomment">Validation</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 01:21, 17 February 2016</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>89.0N - 80.0S, 1.0E - 359.5E</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>89.0N - 80.0S, 1.0E - 359.5E</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Oz validation http://www.bom.gov.au/climate/averages/tables/cw_015590.shtml [Alice Springs] really nice, you can make avg plots, then add a year. temp, # days w/ rain are good variables http://www.bom.gov.au/climate/averages/tables/cw_014015.shtml [Darwin]</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Oz validation http://www.bom.gov.au/climate/averages/tables/cw_015590.shtml [Alice Springs] really nice, you can make avg plots, then add a year. temp, # days w/ rain are good variables http://www.bom.gov.au/climate/averages/tables/cw_014015.shtml [Darwin<ins class="diffchange diffchange-inline">] http://www.bom.gov.au/climate/averages/tables/cw_011003.shtml [Eucla</ins>]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==where code resides in Linux==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==where code resides in Linux==</div></td></tr>
</table>Sethhttps://wiki.chc.ucsb.edu/index.php?title=CHIRTS_FAQ&diff=108546&oldid=prevSeth: /* Fixes to make */2016-02-17T01:07:21Z<p><span dir="auto"><span class="autocomment">Fixes to make</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 01:07, 17 February 2016</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l53" >Line 53:</td>
<td colspan="2" class="diff-lineno">Line 53:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>one of the first steps in the process involves generating a histogram, per-pixel, of all of the Tb values through time. then we identify erroneous high values that would lead to a higher than correct upper threshold. the first way we did this was to locate the end of the real histogram by finding 4 good values (bins with a count >10) in a row followed by two zeroes for the next bins. this breaks down in Siberia/Greenland/Antarctica and if the xxxxoo search string isn't found the histogram isn't modified, leaving some weird erroneous data points. I added 2 if statements to clarify things. if no xxxx00 then allow xxxxo. if not that, allow xxxxoo where x just has to be >0 rather than >10.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>one of the first steps in the process involves generating a histogram, per-pixel, of all of the Tb values through time. then we identify erroneous high values that would lead to a higher than correct upper threshold. the first way we did this was to locate the end of the real histogram by finding 4 good values (bins with a count >10) in a row followed by two zeroes for the next bins. this breaks down in Siberia/Greenland/Antarctica and if the xxxxoo search string isn't found the histogram isn't modified, leaving some weird erroneous data points. I added 2 if statements to clarify things. if no xxxx00 then allow xxxxo. if not that, allow xxxxoo where x just has to be >0 rather than >10.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>somehow record how many cloudy days (hours) were thrown out to get the temp value for a pixel for a month. use this to quantify uncertainty. i.e. december -- El Nino US west coast, India. might be an issue S Mex in summer</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>somehow record how many cloudy days (hours) were thrown out to get the temp value for a pixel for a month. use this to quantify uncertainty. i.e. december -- El Nino US west coast, India. might be an issue S Mex in summer<ins class="diffchange diffchange-inline">, also S Mex jan-mar el nino years.</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Validation==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Validation==</div></td></tr>
</table>Sethhttps://wiki.chc.ucsb.edu/index.php?title=CHIRTS_FAQ&diff=108544&oldid=prevSeth: /* Fixes to make */2016-02-02T22:16:04Z<p><span dir="auto"><span class="autocomment">Fixes to make</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 22:16, 2 February 2016</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l53" >Line 53:</td>
<td colspan="2" class="diff-lineno">Line 53:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>one of the first steps in the process involves generating a histogram, per-pixel, of all of the Tb values through time. then we identify erroneous high values that would lead to a higher than correct upper threshold. the first way we did this was to locate the end of the real histogram by finding 4 good values (bins with a count >10) in a row followed by two zeroes for the next bins. this breaks down in Siberia/Greenland/Antarctica and if the xxxxoo search string isn't found the histogram isn't modified, leaving some weird erroneous data points. I added 2 if statements to clarify things. if no xxxx00 then allow xxxxo. if not that, allow xxxxoo where x just has to be >0 rather than >10.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>one of the first steps in the process involves generating a histogram, per-pixel, of all of the Tb values through time. then we identify erroneous high values that would lead to a higher than correct upper threshold. the first way we did this was to locate the end of the real histogram by finding 4 good values (bins with a count >10) in a row followed by two zeroes for the next bins. this breaks down in Siberia/Greenland/Antarctica and if the xxxxoo search string isn't found the histogram isn't modified, leaving some weird erroneous data points. I added 2 if statements to clarify things. if no xxxx00 then allow xxxxo. if not that, allow xxxxoo where x just has to be >0 rather than >10.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>somehow record how many cloudy days (hours) were thrown out to get the temp value for a pixel for a month. use this to quantify uncertainty. i.e. december -- El Nino US west coast, India</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>somehow record how many cloudy days (hours) were thrown out to get the temp value for a pixel for a month. use this to quantify uncertainty. i.e. december -- El Nino US west coast, India<ins class="diffchange diffchange-inline">. might be an issue S Mex in summer</ins></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Validation==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Validation==</div></td></tr>
</table>Sethhttps://wiki.chc.ucsb.edu/index.php?title=CHIRTS_FAQ&diff=108543&oldid=prevSeth: /* Intro */2016-02-02T21:07:49Z<p><span dir="auto"><span class="autocomment">Intro</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 21:07, 2 February 2016</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l2" >Line 2:</td>
<td colspan="2" class="diff-lineno">Line 2:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Intro==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Intro==</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Thermal IR satellites image the earth constantly and the data are spatially and temporally aggregated, and released as "B1" worldwide IR temperature data at 0, 3, 6, 9, 12, 15, 18, and 21 UTC hours. These satellites sense brightness temperature (Tb) from whatever surfaces are nearest to the satellite in the pixel. Land in Africa will measure on the order of 280-330 K. If there is a cloud over the pixel then the cloud top temperature will be reported, on the order of 220K. Mixtures of clouds and land will result in a mixed reported temperature. While cloudy days are generally cooler than sunny days, clouds can be ephemeral. If a high cloud happens to influence the temperature of a pixel on a warm day, the day was still warm, but the data at that hour will not reflect that. So we: </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Thermal IR satellites image the earth constantly and the data are spatially and temporally aggregated, and released as "B1" worldwide IR temperature data at 0, 3, 6, 9, 12, 15, 18, and 21 UTC hours <ins class="diffchange diffchange-inline">with 8km pixels</ins>. These satellites sense brightness temperature (Tb) from whatever surfaces are nearest to the satellite in the pixel. Land in Africa will measure on the order of 280-330 K. If there is a cloud over the pixel then the cloud top temperature will be reported, on the order of 220K. Mixtures of clouds and land will result in a mixed reported temperature. While cloudy days are generally cooler than sunny days, clouds can be ephemeral. If a high cloud happens to influence the temperature of a pixel on a warm day, the day was still warm, but the data at that hour will not reflect that. So we: </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>*composite the data by taking the maximum temperature within a 5x5 pixel region at each hour, hoping to remove spotty, small clouds</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>*composite the data by taking the maximum temperature within a 5x5 pixel region at each hour, hoping to remove spotty, small clouds</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>*if clouds remain, fill in cloudy "heat of the day" temperatures by determining what hour of the day was warmest with respect to the long term average for that pixel for that hour for that month, and adding that anomaly to the average high t to generate daily Tmax. The idea here is that if it is a warm day with clouds during the heat of the day, but it is clear and relatively warm at some other part of the day, we use the anomaly from the clear values, added to the average high T for that month, to estimate a warm IRTmax. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>*if clouds remain, fill in cloudy "heat of the day" temperatures by determining what hour of the day was warmest with respect to the long term average for that pixel for that hour for that month, and adding that anomaly to the average high t to generate daily Tmax. The idea here is that if it is a warm day with clouds during the heat of the day, but it is clear and relatively warm at some other part of the day, we use the anomaly from the clear values, added to the average high T for that month, to estimate a warm IRTmax. </div></td></tr>
</table>Sethhttps://wiki.chc.ucsb.edu/index.php?title=CHIRTS_FAQ&diff=108542&oldid=prevSeth: /* Validation */2016-02-01T21:39:03Z<p><span dir="auto"><span class="autocomment">Validation</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 21:39, 1 February 2016</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l84" >Line 84:</td>
<td colspan="2" class="diff-lineno">Line 84:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>89.0N - 80.0S, 1.0E - 359.5E</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>89.0N - 80.0S, 1.0E - 359.5E</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Oz validation http://www.bom.gov.au/climate/averages/tables/cw_015590.shtml really nice, you can make avg plots, then add a year. temp, # days w/ rain are good variables</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Oz validation http://www.bom.gov.au/climate/averages/tables/cw_015590.shtml <ins class="diffchange diffchange-inline">[Alice Springs] </ins> really nice, you can make avg plots, then add a year. temp, # days w/ rain are good variables <ins class="diffchange diffchange-inline">http://www.bom.gov.au/climate/averages/tables/cw_014015.shtml [Darwin]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==where code resides in Linux==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==where code resides in Linux==</div></td></tr>
</table>Sethhttps://wiki.chc.ucsb.edu/index.php?title=CHIRTS_FAQ&diff=108541&oldid=prevSeth: /* Validation */2016-02-01T21:33:47Z<p><span dir="auto"><span class="autocomment">Validation</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 21:33, 1 February 2016</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l83" >Line 83:</td>
<td colspan="2" class="diff-lineno">Line 83:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>2.0 degree latitude x 2.0 degree longitude global grid (360x180).</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>2.0 degree latitude x 2.0 degree longitude global grid (360x180).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>89.0N - 80.0S, 1.0E - 359.5E</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>89.0N - 80.0S, 1.0E - 359.5E</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Oz validation http://www.bom.gov.au/climate/averages/tables/cw_015590.shtml really nice, you can make avg plots, then add a year. temp, # days w/ rain are good variables</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==where code resides in Linux==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==where code resides in Linux==</div></td></tr>
</table>Seth