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GOES-15 SOUNDER
OPEN GIRs
11/4/2010
GOES-15 SOUNDER GIRs
 PSPOT-0003
– Striping on First Public IR Sounding
– Noticed first on Channel 15, and then on other SW channels.
– 7/21, 7/28 – Switched to Side2 and back with no remedy.
 PSPOT-0004
– Signal Jumps in GOES-15 Sounder MW #2 Detector Data
– Observed during scanning (dynamic) and star (static)
operations.
– In spec with less than 10 counts jumps. Not comparable to
GOES-14 loose beam extending lens problem.
GOES-15 SOUNDER GIRs
 PSPOT-0005
– Sounder Patch Temperature Anomaly Following Yaw Flip
– Patch Temperature Control was lost right after Yaw Flip and patch
reached 99 C (102 C later)
– Analysis concluded potential dislocation of roll blanket between
the cooler and the FW bucket
– Operational Remedy – Yaw Flip very close to each Equinox
– Operational Impact (Twice per year)
– Out-of-spec performance up to 28.5 hours with partial (~70%)
scheduled products due to INR recovery.
GOES-15 SOUNDER GIRs
 PSPOT- 0006
– GOES-15 Sounder SW Det 2 Line to Line Relative Accuracy
– Detector 2 of the GOES-15 Sounder shortwave channels is exhibiting
offsets which cause degraded line-to-line relative accuracy
performance. Channel 14, Detector 2 is the only channel to exceed
the specification referenced in S-415-05, paragraph 3.3.20.2-1.
– ITT is still characterizing.