The Ozone Mapping and Profiler Suites (OMPS) are an important payload onboard the Suomi NPP (SNPP) and Joint Polar Satellite System (JPSS)-01 (alias NOAA-20) satellites, which launched on 28 October 2011 and 18 November 2017, respectively. The v 2 reprocessed data are archived in the NOAA CLASS data center with the same format as the operational data.
The normalized radiance differences at the same wavelength between the NM and NP observations are reduced from 0.001 order ( v 1 reprocessing) or 0.01 order (operational processing) to 0.001 order or smaller. It also advances the uniformity of the data over the dichroic range from 300 to 310 nm between the NM and NP. The results demonstrate that the new reprocessing significantly improves the accuracy and consistency of the life-time SNPP OMPS NM and NP SDR data sets. Finally, this study compares the v 2 reprocessed OMPS data sets with the operational and the v 1 reprocessed data sets. This study further analyzes the impact of each improvement on the quality of the OMPS SDR data by taking advantage of the existing OMPS SDR calibration/validation studies. Compared with a previous ( v 1) reprocessing, this new reprocessing includes the improvements associated with the following updated tables or error correction: an updated stray light correction table for the NM, an off-nadir geolocation error correction for the NM, an artificial offset error correction in the NM dark processing code, and biweekly solar wavelength LUTs for the NP. In this study, we present results for the newly ( v 2) reprocessed SNPP OMPS NM and NP SDR data prior to 30 June 2021, which uses consistent calibration tables with improved accuracy. However, the discrepancies of quality remain in the operational OMPS SDR data prior to 28 June 2021 due to changes in calibration algorithms associated with the calibration coefficient look-up tables (LUTs) during this period.
The OMPS NM and NP instruments flying on the Suomi-NPP (SNPP) satellite have provided over ten years of operational Sensor Data Records (SDRs) data sets to support a variety of OMPS Environmental Data Record (EDR) applications. The Nadir Mapper (NM) and Nadir Profiler (NP) within the Ozone Mapping and Profiler Suites (OMPS) are ultraviolet spectrometers to measure Earth radiance and Solar irradiance spectra from 300–380 nm and 250–310 nm, respectively.
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