A novel algorithm for detection of precipitation in tropical regions using PMW radiometers
A novel algorithm for the detection of precipitation is described and tested. The algorithm is applicable to any modern passive microwave radiometer on board polar orbiting satellites independent of the observation geometry and channel frequency assortment. The algorithm is based on the application...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2015-03-01
|
| Series: | Atmospheric Measurement Techniques |
| Online Access: | http://www.atmos-meas-tech.net/8/1217/2015/amt-8-1217-2015.pdf |
| _version_ | 1817979480118919168 |
|---|---|
| author | D. Casella G. Panegrossi P. Sanò L. Milani M. Petracca S. Dietrich |
| author_facet | D. Casella G. Panegrossi P. Sanò L. Milani M. Petracca S. Dietrich |
| author_sort | D. Casella |
| collection | DOAJ |
| description | A novel algorithm for the detection of precipitation is described and tested.
The algorithm is applicable to any modern passive microwave radiometer on
board polar orbiting satellites independent of the observation geometry and
channel frequency assortment. The algorithm is based on the application of
canonical correlation analysis and on the definition of a threshold to be
applied to the resulting linear combination of the brightness temperatures in
all available channels. The algorithm has been developed using a 2-year data
set of co-located Special Sensor Microwave Imager/Sounder (SSMIS) and
Tropical Rainfall Measuring Mission precipitation radar (TRMM-PR)
measurements and Advanced Microwave Sounding Unit (AMSU) Microwave Humidity
Sounder and TRMM-PR measurements. This data set was partitioned into
four classes depending on the background surface emissivity (vegetated land,
arid land, ocean, and coast) with the same procedure applied for each surface
class. In this paper we describe the procedure and evaluate the results in
comparison with many well-known algorithms for the detection of
precipitation.
<br><br>
The algorithm shows a small rate of false alarms and superior detection
capability; it can efficiently detect (probability of detection between 0.55
and 0.71) minimum rain rate varying from 0.14 mm h<sup>-1</sup> (AMSU over
ocean) to 0.41 (SSMIS over coast) with the remarkable result of
0.25 mm h<sup>-1</sup> over arid land surfaces. |
| first_indexed | 2024-04-13T22:42:24Z |
| format | Article |
| id | doaj.art-fc509612e0e34b6b8a0c68bb2843891e |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-04-13T22:42:24Z |
| publishDate | 2015-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-fc509612e0e34b6b8a0c68bb2843891e2022-12-22T02:26:33ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482015-03-01831217123210.5194/amt-8-1217-2015A novel algorithm for detection of precipitation in tropical regions using PMW radiometersD. Casella0G. Panegrossi1P. Sanò2L. Milani3M. Petracca4S. Dietrich5Consiglio Nazionale delle Ricerche – Istituto di Scienze dell'Atmosfera e del Clima (CNR-ISAC), Rome, ItalyConsiglio Nazionale delle Ricerche – Istituto di Scienze dell'Atmosfera e del Clima (CNR-ISAC), Rome, ItalyConsiglio Nazionale delle Ricerche – Istituto di Scienze dell'Atmosfera e del Clima (CNR-ISAC), Rome, ItalyConsiglio Nazionale delle Ricerche – Istituto di Scienze dell'Atmosfera e del Clima (CNR-ISAC), Rome, ItalyConsiglio Nazionale delle Ricerche – Istituto di Scienze dell'Atmosfera e del Clima (CNR-ISAC), Rome, ItalyConsiglio Nazionale delle Ricerche – Istituto di Scienze dell'Atmosfera e del Clima (CNR-ISAC), Rome, ItalyA novel algorithm for the detection of precipitation is described and tested. The algorithm is applicable to any modern passive microwave radiometer on board polar orbiting satellites independent of the observation geometry and channel frequency assortment. The algorithm is based on the application of canonical correlation analysis and on the definition of a threshold to be applied to the resulting linear combination of the brightness temperatures in all available channels. The algorithm has been developed using a 2-year data set of co-located Special Sensor Microwave Imager/Sounder (SSMIS) and Tropical Rainfall Measuring Mission precipitation radar (TRMM-PR) measurements and Advanced Microwave Sounding Unit (AMSU) Microwave Humidity Sounder and TRMM-PR measurements. This data set was partitioned into four classes depending on the background surface emissivity (vegetated land, arid land, ocean, and coast) with the same procedure applied for each surface class. In this paper we describe the procedure and evaluate the results in comparison with many well-known algorithms for the detection of precipitation. <br><br> The algorithm shows a small rate of false alarms and superior detection capability; it can efficiently detect (probability of detection between 0.55 and 0.71) minimum rain rate varying from 0.14 mm h<sup>-1</sup> (AMSU over ocean) to 0.41 (SSMIS over coast) with the remarkable result of 0.25 mm h<sup>-1</sup> over arid land surfaces.http://www.atmos-meas-tech.net/8/1217/2015/amt-8-1217-2015.pdf |
| spellingShingle | D. Casella G. Panegrossi P. Sanò L. Milani M. Petracca S. Dietrich A novel algorithm for detection of precipitation in tropical regions using PMW radiometers Atmospheric Measurement Techniques |
| title | A novel algorithm for detection of precipitation in tropical regions using PMW radiometers |
| title_full | A novel algorithm for detection of precipitation in tropical regions using PMW radiometers |
| title_fullStr | A novel algorithm for detection of precipitation in tropical regions using PMW radiometers |
| title_full_unstemmed | A novel algorithm for detection of precipitation in tropical regions using PMW radiometers |
| title_short | A novel algorithm for detection of precipitation in tropical regions using PMW radiometers |
| title_sort | novel algorithm for detection of precipitation in tropical regions using pmw radiometers |
| url | http://www.atmos-meas-tech.net/8/1217/2015/amt-8-1217-2015.pdf |
| work_keys_str_mv | AT dcasella anovelalgorithmfordetectionofprecipitationintropicalregionsusingpmwradiometers AT gpanegrossi anovelalgorithmfordetectionofprecipitationintropicalregionsusingpmwradiometers AT psano anovelalgorithmfordetectionofprecipitationintropicalregionsusingpmwradiometers AT lmilani anovelalgorithmfordetectionofprecipitationintropicalregionsusingpmwradiometers AT mpetracca anovelalgorithmfordetectionofprecipitationintropicalregionsusingpmwradiometers AT sdietrich anovelalgorithmfordetectionofprecipitationintropicalregionsusingpmwradiometers AT dcasella novelalgorithmfordetectionofprecipitationintropicalregionsusingpmwradiometers AT gpanegrossi novelalgorithmfordetectionofprecipitationintropicalregionsusingpmwradiometers AT psano novelalgorithmfordetectionofprecipitationintropicalregionsusingpmwradiometers AT lmilani novelalgorithmfordetectionofprecipitationintropicalregionsusingpmwradiometers AT mpetracca novelalgorithmfordetectionofprecipitationintropicalregionsusingpmwradiometers AT sdietrich novelalgorithmfordetectionofprecipitationintropicalregionsusingpmwradiometers |