The GOES-R ABI Fixed Grid Format: Overview and Case Study

Abstract:

The Advanced Baseline Imager (ABI) aboard the Geostationary Operational Environmental Satellite-R series (GOES-R) will image Earth in 16 spectral channels at channel-specific resolutions of 0.5, 1.0 and 2.0 km. All Level-1b and Level-2+ products created by ABI will be geometrically interpolated to a Fixed Grid; a set of static pixel locations centered on the sub-satellite point. The Fixed Grid represents a new standard in products created by the GOES series of satellites and will aid users by providing continuity in the locations of geographic features throughout mission life. However, detector-level anomalies will be impacted by the resampling process in a variety of ways. Depending on the nature of the anomaly, the proximity of the detector sample to the pixel centers, and the underlying scene phenomenology, the resampling process has the potential to both amplify and mitigate system anomalies. This work will introduce the resampling process and the Fixed Grid, as well as present a case study characterizing the radiometric impacts of detector anomalies to L1b products.