Viewing Tips: Hover over the different colors in the image to see the corresponding temperature value in the Layer List in NASA Worldview. This Geostationary Operational Environmental Satellite-East (GOES-East) Clean Infrared (10.3μm, Band 13) image acquired on September 1, 2019, at 17:00 UTC (1:00PM ET) shows that the cloud-top brightness temperatures near the center of the hurricane are below -70☌ (-94☏). The results from this study highlight the necessity of the constant monitoring of the detector-level gain and its change as a function of scan-angle, as implemented in the MODIS Collection 6 (C6) products.Hurricane Dorian made landfall on the Bahamas at 16:40 UTC (12:40PM ET), on Septemas a Category 5 hurricane (indicating winds greater than 155 mph). Different EV targets are analyzed to accommodate the high-gain ocean bands which tend to saturate over land surfaces. This paper provides a comprehensive assessment of the detector-to-detector calibration differences in the MODIS VIS/NISR spectral bands using the on-board calibrators and earth-view (EV) level 1B (L1B) data products. On-orbit observations show that the changes in the detector response are wavelength, scan-angle and mirror side dependent. Near-monthly lunar observations are also used to track the sensor response versus scan angle (RVS) change on-orbit. MODIS reflective solar bands (RSB) are calibrated on-orbit by a system that consists of a solar diffuser (SD) and a solar diffuser stability monitor (SDSM). Currently, there are two nearly identical MODIS instruments operating in space: one on the Terra spacecraft launched in December 1999 and another on the Aqua spacecraft launched in May 2002. MODIS has 20 reflective solar bands (RSB) with a total of 330 individual detectors.

Modis nasa earthview