Opened 12 years ago

Closed 10 years ago

#119 closed bug (fixed)

Difference between Azspec and Caligeo processed Hawk data

Reported by: benj Owned by: benj
Priority: alpha 5 Milestone:
Component: az* programs Keywords:
Cc: mggr Other processors:

Description (last modified by benj)

Split off from ticket #113.

Hawk data processed with Azspec and Caligeo shows a gap between the two, particularly at the short-wave end of the spectrum. Over land the two are very close at the longer-wave end, over water Caligeo is consistently higher than Azspec (though the gap is larger at the short-wave end). Azspec data looks more plausible but Hawk needs calibrating to check which (if either) is correct.

Over water:
Azspec and Caligeo processed data over water

Over land:
Azspec and caligeo processed data over land

Attachments (3)

aznewvscaliwater.jpg (57.7 KB) - added by benj 12 years ago.
Azspec and Caligeo processed data over water
aznewvscaliland.jpg (70.9 KB) - added by benj 12 years ago.
Azspec and caligeo processed data over land
azcalidiff.png (7.2 KB) - added by benj 10 years ago.
Difference between azspec and caligeo from GB08/12 152a/2009 line 5 (fixed)

Download all attachments as: .zip

Change History (6)

Changed 12 years ago by benj

Azspec and Caligeo processed data over water

Changed 12 years ago by benj

Azspec and caligeo processed data over land

comment:1 Changed 12 years ago by benj

  • Description modified (diff)

comment:2 Changed 12 years ago by mggr

Note FODIS data also show this difference (#133)

Changed 10 years ago by benj

Difference between azspec and caligeo from GB08/12 152a/2009 line 5 (fixed)

comment:3 Changed 10 years ago by benj

  • Resolution set to fixed
  • Status changed from new to closed

Problem seems to have gone away. May have been fixed by a number of different changes to azspec, azgcorr or Caligeo, so we don't know which one was wrong.

Graphs now match pretty well (see below). Small remaining difference is likely to be due to the fact that the two programs don't do the geolocation exactly the same, the difference is even smaller if the same graph is produced using the level 1 files.

Difference between azspec and caligeo from GB08/12 152a/2009 line 5 (fixed)

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