Evaluation of V05 precipitation estimates from GPM constellation radiometers using KuPR as the reference

You, Yalei; Petkovic, Veljko; Tan, Jackson; Kroodsma, Rachael; Berg, Wesley; Kidd, Chris; Peters-Lidard, Christa

doi:10.1175/JHM-D-19-0144.1

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Evaluation of V05 precipitation estimates from GPM constellation radiometers using KuPR as the reference

2020
By You, Yalei ; Petkovic, Veljko ; Tan, Jackson ; ...
Source: Journal of Hydrometeorology, 21(4), 705-728

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Journal Title:

Journal of Hydrometeorology
Personal Author:

You, Yalei ; Petkovic, Veljko ; Tan, Jackson ; Kroodsma, Rachael ; Berg, Wesley ; ... More +

You, Yalei ; Petkovic, Veljko ; Tan, Jackson ; Kroodsma, Rachael ; Berg, Wesley ; Kidd, Chris ; Peters-Lidard, Christa Less -
NOAA Program & Office:

CISESS (Cooperative Institute for Satellite Earth System Studies) ; CICS (Cooperative Institute for Climate and Satellites)

CISESS (Cooperative Institute for Satellite Earth System Studies) ; CICS (Cooperative Institute for Climate and Satellites) Less -
Description:

This study assesses the level-2 precipitation estimates from 10 radiometers relative to Global Precipitation Measurement (GPM) Ku-band precipitation radar (KuPR) in two parts. First, nine sensors—four imagers [AdvancedMicrowave Scanning Radiometer 2 (AMSR2) and three Special SensorMicrowave Imager/Sounders (SSMISs)] and five sounders [Advanced Technology Microwave Sounder (ATMS) and four Microwave Humidity Sounders (MHSs)]—are evaluated over the 658S–658N region. Over ocean, imagers outperform sounders, primarily due to the usage of low-frequency channels. Furthermore, AMSR2 is clearly superior to SSMISs, likely due to the finer footprint size. Over land all sensors perform similarly except the noticeably worse performance from ATMS and SSMIS-F17. Second, we include the Sondeur Atmospherique du Profil d’Humidite Intertropicale par Radiometrie (SAPHIR) into the evaluation process, contrasting it against other sensors in the SAPHIR latitudes (308S–308N). SAPHIR has a slightly worse detection capability than other sounders over ocean but comparable detection performance to MHSs over land. The intensity estimates from SAPHIR show a larger normalized root-mean-square-error over both land and ocean, likely because only 183.3-GHz channels are available. Currently, imagers are preferred to sounders when level-2 estimates are incorporated into level-3 products. Our results suggest a sensor-specific priority order. Over ocean, this study indicates a priority order of AMSR2, SSMISs, MHSs and ATMS, and SAPHIR. Over land, SSMIS-F17, ATMS and SAPHIR should be given a lower priority than the other sensors.
Keywords:

[+]

Precipitation (Meteorology) Remote Sensing
Source:

Journal of Hydrometeorology, 21(4), 705-728
DOI:

https://doi.org/10.1175/JHM-D-19-0144.1
Document Type:

Journal Article
Funding:

Grant no. NA19NES4320002 ; Grant no. NA14NES4320003

Grant no. NA19NES4320002 ; Grant no. NA14NES4320003 Less -
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Submitted
Main Document Checksum:

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urn:sha256:cb9187b75a4c44dc57a836d2be92e7f49467a0471d14bb455fe590a1d3815b71
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https://repository.library.noaa.gov/view/noaa/48125/noaa_48125_DS1.pdf
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Evaluation of V05 precipitation estimates from GPM constellation radiometers using KuPR as the reference

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