Talk:GEOS-5 ADAS Radiance Monitoring: Difference between revisions
No edit summary |
No edit summary |
||
| Line 263: | Line 263: | ||
Eumetsat announced "IASI External Calibration (Moon Intrusion). Short interruptions can be expected." from 8/22 02:51 to 8/23 02:12. There were however fairly large portions of the swaths missing in the Northern Hemisphere. The data coverage appeared to go back to normal 8/23 06z. | Eumetsat announced "IASI External Calibration (Moon Intrusion). Short interruptions can be expected." from 8/22 02:51 to 8/23 02:12. There were however fairly large portions of the swaths missing in the Northern Hemisphere. The data coverage appeared to go back to normal 8/23 06z. | ||
== Sept 2016 Aqua anomaly (both AIRS & AMSU-A) | == Sept 2016 Aqua anomaly (both AIRS & AMSU-A) == | ||
*''' 24 Sept 2016 ''' AIRS disabled due to bad data from 25 Sept 2016 (and missing data 26-28 Sept). Data received on 25 Sept was 'non-scientific'. AMSU-A detector A1, responsible for channels 1 & 2, has been disabled since 18 UTC cycle, 24 September. It remains off as of this update. satinfo.db's are updated to reflect these in FP and REANL systems. | *''' 24 Sept 2016 ''' AIRS disabled due to bad data from 25 Sept 2016 (and missing data 26-28 Sept). Data received on 25 Sept was 'non-scientific'. AMSU-A detector A1, responsible for channels 1 & 2, has been disabled since 18 UTC cycle, 24 September. It remains off as of this update. satinfo.db's are updated to reflect these in FP and REANL systems. | ||
*''' 28 Oct 2016 ''' Follow up that the A1 detector is still seemingly bad. AMSU-A remains off in FP and REANL systems | |||
== October Metop-B Anomaly (ch. 15 issue) == | |||
*''' 17 Oct 2016 ''' Midway through the 00 UTC analysis on 17 Oct 2016, channel 15 on AMSU-A Metop-B appears to have failed. As of the failure, the GSI rejects the entire footprint in the event of a channel 15 failure (as well as other channels for various instruments). In terms of assimilation methodology, the selection and assimilation of channels 7-14 over water (where ch1,2 < 285 K) has no specific dependency on Ch. 15. Two steps forward have been done/are underway: | |||
** For MERRA-2, a specific hook allowing the assimilation of channels 7-14 over water w/ ch1,2 < 285 K to be assimilated. (implemented in MERRA-2 as of calendar day 28 Oct 2016. Rob has, as of writing, not yet rewound/restarted MERRA-2 w/ the fix. A slight overlap period will be analyzed. | |||
** For FP-onward systems, NCEP has a ticket (#612) relaxing the round-rejection/read cycle in read_bufrtovs. Meta is investigating these changes to ensure that they were not overly-broad. | |||
** It is also noted that no updates to the satinfo.db have yet been committed. For MERRA-2, it shouldn't be necessary w/ the fix (since the changes will be in place prior to the failure. Even if no explicit turn-off is deemed necessary, a comment in the active_channels will likely be useful. | |||