Occurences and changes to IASI processing

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Date Occurence 01/03/07 Biases from two iterations of 28/02/07. Reject IR cloudy, SW, 10 extra chans. No AMSU in cloud cost calculation. AVHRR warmest FOV 01/03/07 Update biases. 04/03/07 QU06 Reject rain-flagged data 05/03/07 QU12 Switch to Fixed FOV, update Biases 08/03/07 QU12 Use channels over land >400hPa 12/03/07 QU12 Biases updated. AVHRR most-homogeneous FOV 15/03/07 QU12 Local data now being processed 19/03/07 00:38 Pixel 3 misbehaving 21/03/07 QU06 Pixel 3 removed from processing. 25/03/07 QU12 Change to EUMETSAT software, fewer flagged obs 27/03/07 QU12 AAPP Cloud flags now correctly implemented 30/03/07 12:38 All global data now flagged. Only local data processed 02/04/07 13:11 Flags in global data back to normal, satellite operating with new calibration. Pixel 3 back in 02/04/07 QU12 Change to bias correction 03/04/07 mid-day-ish Local data now processed but flagged 03/04/07 QU12 Change to bias correction 04/04/07 14:00 to 05/04/07 17.20 IASI in External Calibration mode 11/04/07 QU12 Change to bias correction 12/04/07 09:40 until 17/04/07 16.15 IASI in External Calibration mode 17/04/07 16.15 Back in normal scanning mode 20/04/07 QU12 to 27/04/07 QU12 MetOp Payload switched itself off, no IASI data 27/04/07 QU12 MetOp Payload back on, we have data again 09/05/07 ?1500 to 10/05/07 QU18 IASI in External Calibration 10/05/07 Changed channel selection to reject higher-peaking water vapour channels 15/05/07 13.18 until 16/05/07 18.00 IASI in "heater refuse mode" 21/05/07 09.27 to 21/05/07 10.54 IASI in External Calibration mode 28/05/07 09.03 to 29/05/07 10.09 IASI in External Calibration mode 30/05/07 QU12 Change of bias correction coefficients 04/06/07 09.38 to 05/06/07 10.58 IASI in External Calibration mode 05/06/07 10.58 IASI back to normal scanning 11/06/07 08.53 until 12/06/07 10.13 IASI in External Calibration mode 13/06/07 10.23 to 14/06/07 21.40 No IASI data 15/06/07 QU12 Change of bias correction coefficients 22/06/07 QU06 Switch to using SSIREM 27/06/07 13.30 Calibration change on-board satellite 02/07/07 QU00 Change of bias correction coefficients 02/07/07 15:00 to 03/07/07 07:59 External Calibration mode 09/07/07 07:45 Change to ground segment software, related to change on 27/06/07, improved flagging 10/07/07 06:42 Further change to ground segment software, improved spectral performance 16/07/07 QU12 Change of bias correction coefficients 20/07/07 04:30 to 21/07/07 17:09 IASI in Heater Refuse Mode 03/08/07 06:03 to 04/08/07 00:32 IASI in external calibration mode 04/08/07 Now rejecting AAPP Cloudy obs before 1D-Var - affects ob rejection categorisation counts only 17/09/07 05:08 to 21/09/07 08:58 No IASI data - MetOp payload switchoff 21/09/07 08:58 IASI back 01/11/07 13.32 to 02/11/07 01.39 IASI in Heater Refuse Mode 08/11/07 11.02 to 09/11/07 01.45 IASI in Heater Refuse Mode 18/11/07 03:25 to 22/11/07 14.10 IASI in Standby Refuse Mode 22/11/07 14.10 IASI back 04/12/07 12:09 IASI L1 PPF V4.0 (better GQIS flagging) 16/01/08 13.34 to 19/01/08 14.57 MetOp payload switchoff - no IASI 19/01/08 14.57 IASI back 23/01/08 05:15 to 09:10 IASI in external calibration mode 29/01/08 17.23 to 19.05 no IASI data 04/02/08 12.46 to 19.25 IASI in heater refuse mode 09/02/08 10.35 to 14.22 IASI in heater refuse mode 11/02/08 15.30 IASI PCs version upgrade for storage in MetDB 21/02/08 05:15 to 09:11 External calibration mode 08/03/08 22.05 to 09/03/08 04.59 No IASI data 19/03/08 21.51 to 27/03/08 04.54 No IASI data - MetOp down 27/03/08 04.54 IASI back following ice decontamination procedure 31/03/08 05.07 to 09.01 External Calibration mode 08/04/08 07.41 to 09/04/08 07.50 Out of plane manoeuvre - no MetOp data 15/04/08 Bias Correction Update 19/04/08 11.15 IASI back after xxx hours outage 21/04/08 05.17 No IASI data for about 2 hours NB no notification when it came back 11/05/08 02.14 No IASI data for about 2 hours NB no notification when it came back 18/05/08 05.12-09.15 External Calibration mode 16/06/08 05.15-09.15 External Calibration mode 21/07/08 23.46-02.46 SEU - Heater Refuse Mode 22/07/08 15.20-17.08 No IASI data 30/07/08 17.39 IASI back from outage which lasted a couple of hours (no notification of start time - likely 15.30-16.00) 19/08/08 Bias correction update 21/08/08 22.15 to 22/08/08 18.10 External Calibration Mode 11/09/08 05.12 to 09.10 External Calibration Mode 19/09/08 10.40 to ~17.00 EUMETCAST broken - no IASI data 10/10/08 05.12 to 09.10 External Calibration Mode 23/10/08 09.10-16.00 MetOp out of plane manoeuvre 13/11/08 12.20 Slight change to AAPP cloud detection, a few more obs pass the tests now 07/12/08 05.13 to 09.11 Exterbal Calibration Mode 09/12/08 21:05 IASI in Standby Refuse mode - no data 12/12/08 12:44 IASI back 16/12/08 06:00-23:30 IASI in External Calibration mode - moon intrusion 29/12/08 22:50 IASI in Standby Refuse Mode 02/01/09 12:05 IASI back 03/02/09 05:12-09:10 External Calibration 16/03/09 Bias Correction Change 19/05/09 Bias Correction Change 30/05/09 05:13-09:10 External Calibration mode 25/08/09 05:12-09:11 External Calibration mode 07/09/09 18:14-08:57 No IASI data 23/09/09 05:10-09:15 External Calibration mode 30/09/09 06:55 onwards IASI Maintenance 02/10/09 09:35 IASI back 30/10/09 04:50-08.23 Heater Refuse mode 10/11/09 06Z UM Model upgrade to 70L. IASI now processed with ISEM-6 emissivity over sea 23/11/09 15:05-16:53 IASI unavailable 23/11/09 08:20-10:02 IASI unavailable