Talk:GEOS-5 ADAS Radiance Monitoring: Difference between revisions
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* The assessment performed by the CrIS Cal/Val Science Team has shown that the anomaly impact is in the form of a cold radiometric bias with an estimated magnitude of about 0.1 K over the LWIR band and 0.2 K over the SWIR band. The performance of the SNPP CrIS SDR data has been evaluated and complies with the JPSS Level-1 requirements. The impact of the anomaly is well-understood and solutions are being developed and tested. See [https://www.ospo.noaa.gov/data/messages/2023/05/MSG_20230526_1205.html NESDIS satellite message] | * The assessment performed by the CrIS Cal/Val Science Team has shown that the anomaly impact is in the form of a cold radiometric bias with an estimated magnitude of about 0.1 K over the LWIR band and 0.2 K over the SWIR band. The performance of the SNPP CrIS SDR data has been evaluated and complies with the JPSS Level-1 requirements. The impact of the anomaly is well-understood and solutions are being developed and tested. See [https://www.ospo.noaa.gov/data/messages/2023/05/MSG_20230526_1205.html NESDIS satellite message] | ||
* '''1 Jun 2023''' The radiance monitoring showed that the radiance bias of the CrIS SNPP data was impacted. The change in bias appears to have mostly stabilized. The bias correction coefficients quickly adjusted to the change in bias. | * '''1 Jun 2023''' The radiance monitoring showed that the radiance bias of the CrIS SNPP data was impacted. The change in bias appears to have mostly stabilized. The bias correction coefficients quickly adjusted to the change in bias. | ||
== AMSU-A MetOp-B ch6 increased noise level == | |||
* '''2 Jun 2023''' Noise levels for AMSU-A MetOp-B channel 6 have been increasing with a substantial jump in the noise levels since November 2022. This has led to scan lines marked as missing data when the noise level is excessive, and the count of radiance data has decreased by half. The lower channels (including ch 6) have not been used since the failure of ch 15 some time ago so this should not affect the current DAS although earlier systems (MERRA2, FPIT) exclude all channels for spots where key channels (such as ch6) are bad. | |||