Intercalibration Of Cross-Track Scanners In Gpm Constellation

Keywords

Advanced Technology Microwave Sounder (ATMS); Global Precipitation Measurement (GPM); GPM Intersatellite Calibration Working Group (XCAL); Microwave Humidity Sounder (MHS); microwave sounders; Sondeur Atmosphérique du Profil d'Humidité Intertropicale par Radiométrie (SAPHIR)

Abstract

This paper discusses the intersatellite radiometric calibration for microwave sounders in support of NASA's Global Precipitation Measurement (GPM) mission. This paper is an extension of previous GPM Intersatellite Calibration Working Group work, which assesses the robustness of the Central Florida Remote Sensing Laboratory 'double difference' technique for sounders intercalibration. In this paper, we will analyze the intercalibration between the Advanced Technology Microwave Sounder on board the National Polar-orbiting Operational Environmental Satellite System Preparatory Project, the Microwave Humidity Sounder on board the MetOp-A and MetOp-B and NOAA-18 and NOAA-19, and the Sondeur Atmosphérique du Profil d'Humidité Intertropicale par Radiométrie sounder onboard the Megha-Tropiques satellite. The sensitivity of the calibration to the geophysical parameters and incidence angles is investigated using two years data. Here, it is observed that a reliable intercalibration can be made only when the path lengths of the two sensors are similar, so when matching the scan angles for the two sensors, the sensitivity of the biases upon the water vapor profiles is significantly reduced.

Publication Date

10-1-2018

Publication Title

IEEE Transactions on Geoscience and Remote Sensing

Volume

56

Issue

10

Number of Pages

5749-5757

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TGRS.2018.2825333

Socpus ID

85047017838 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85047017838

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