Talk:GEOS-5 ADAS Radiance Monitoring: Difference between revisions
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*''' 28 Oct 2016 ''' Follow up that the A1 detector is still seemingly bad. AMSU-A remains off 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 2016 Metop-B | == October 2016 Metop-B ch. 15 failure/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: | *''' 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 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. | ** 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. | ** 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. | ||