Talk:GEOS-5 ADAS Radiance Monitoring: Difference between revisions
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CrIS SNPP scan mirror baffle temperature anomaly |
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== GOES-18 replaces GOES-17 as operational GOES West == | == GOES-18 replaces GOES-17 as operational GOES West == | ||
* GOES-18 became the operational GOES-West satellite as of 4 January 2023, 18UTC. | * GOES-18 became the operational GOES-West satellite as of 4 January 2023, 18UTC. | ||
== SNPP CrIS scan mirror baffle temperature anomaly == | |||
* On May 18, 2023, around 14:04:47 UTC SNPP CrIS experienced a sudden drop in the scan baffle temperature reading. The baffle temperature telemetry value is used in the CrIS radiometric calibration. | |||
* 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. | |||
* '''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. | |||