Validation of the New Algorithm for Rain Rate Retrieval from AMSR2 Data Using TMI Rain Rate Product
A new algorithm is derived for rain rate (RR) estimation from Advanced Microwave Sounding Radiometer 2 (AMSR2) measurements taken at 6.9, 7.3, and 10.65 GHz. The algorithm is based on the numerical simulation of brightness temperatures (TB) for AMSR2 lower frequency channels, using a simplified radi...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2015/492603 |
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| author | Elizaveta Zabolotskikh Bertrand Chapron |
| author_facet | Elizaveta Zabolotskikh Bertrand Chapron |
| author_sort | Elizaveta Zabolotskikh |
| collection | DOAJ |
| description | A new algorithm is derived for rain rate (RR) estimation from Advanced Microwave Sounding Radiometer 2 (AMSR2) measurements taken at 6.9, 7.3, and 10.65 GHz. The algorithm is based on the numerical simulation of brightness temperatures (TB) for AMSR2 lower frequency channels, using a simplified radiation transfer model. Simultaneous meteorological and hydrological observations, supplemented with modeled values of cloud liquid water content and rain rate values, are used for the calculation of an ensemble of AMSR2 TBs and RRs. Ice clouds are not taken into account. AMSR2 brightness temperature differences at C- and X-band channels are then used as inputs to train a neural network (NN) function for RR retrieval. Validation is performed against Tropical Rain Measurement Mission (TRMM) Microwave Instrument (TMI) RR products. For colocated AMSR2-TMI measurements, obtained within 10 min intervals, errors are about 1 mm/h. The new algorithm is applicable for RR estimation up to 20 mm/h. For RR<2 mm/h the retrieval error is 0.3 mm/h. For RR>10 mm/h the algorithm significantly underestimates TMI RR. |
| format | Article |
| id | doaj-art-8abadf0910574f8a9c89b7c68d1e279b |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-8abadf0910574f8a9c89b7c68d1e279b2025-02-03T01:01:38ZengWileyAdvances in Meteorology1687-93091687-93172015-01-01201510.1155/2015/492603492603Validation of the New Algorithm for Rain Rate Retrieval from AMSR2 Data Using TMI Rain Rate ProductElizaveta Zabolotskikh0Bertrand Chapron1Satellite Oceanography Laboratory, Russian State Hydrometeorological University, Malookhtinsky 98, St. Petersburg 195196, RussiaSatellite Oceanography Laboratory, Russian State Hydrometeorological University, Malookhtinsky 98, St. Petersburg 195196, RussiaA new algorithm is derived for rain rate (RR) estimation from Advanced Microwave Sounding Radiometer 2 (AMSR2) measurements taken at 6.9, 7.3, and 10.65 GHz. The algorithm is based on the numerical simulation of brightness temperatures (TB) for AMSR2 lower frequency channels, using a simplified radiation transfer model. Simultaneous meteorological and hydrological observations, supplemented with modeled values of cloud liquid water content and rain rate values, are used for the calculation of an ensemble of AMSR2 TBs and RRs. Ice clouds are not taken into account. AMSR2 brightness temperature differences at C- and X-band channels are then used as inputs to train a neural network (NN) function for RR retrieval. Validation is performed against Tropical Rain Measurement Mission (TRMM) Microwave Instrument (TMI) RR products. For colocated AMSR2-TMI measurements, obtained within 10 min intervals, errors are about 1 mm/h. The new algorithm is applicable for RR estimation up to 20 mm/h. For RR<2 mm/h the retrieval error is 0.3 mm/h. For RR>10 mm/h the algorithm significantly underestimates TMI RR.http://dx.doi.org/10.1155/2015/492603 |
| spellingShingle | Elizaveta Zabolotskikh Bertrand Chapron Validation of the New Algorithm for Rain Rate Retrieval from AMSR2 Data Using TMI Rain Rate Product Advances in Meteorology |
| title | Validation of the New Algorithm for Rain Rate Retrieval from AMSR2 Data Using TMI Rain Rate Product |
| title_full | Validation of the New Algorithm for Rain Rate Retrieval from AMSR2 Data Using TMI Rain Rate Product |
| title_fullStr | Validation of the New Algorithm for Rain Rate Retrieval from AMSR2 Data Using TMI Rain Rate Product |
| title_full_unstemmed | Validation of the New Algorithm for Rain Rate Retrieval from AMSR2 Data Using TMI Rain Rate Product |
| title_short | Validation of the New Algorithm for Rain Rate Retrieval from AMSR2 Data Using TMI Rain Rate Product |
| title_sort | validation of the new algorithm for rain rate retrieval from amsr2 data using tmi rain rate product |
| url | http://dx.doi.org/10.1155/2015/492603 |
| work_keys_str_mv | AT elizavetazabolotskikh validationofthenewalgorithmforrainrateretrievalfromamsr2datausingtmirainrateproduct AT bertrandchapron validationofthenewalgorithmforrainrateretrievalfromamsr2datausingtmirainrateproduct |