Evaluation of RISAT-1 data for soil moisture retrieval in semi-arid tropics of India
The selection of better polarisation and incidence angle for soil moisture retrieval using RISAT-1 microwave data was experimented at Hayathnagar research farm of ICAR-CRIDA, Hyderabad. Fine Resolution Sensor (FRS-1) data (spatial resolution of 3 m) and Medium Resolution ScanSAR (MRS) data (spatial...
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| Format: | Article |
| Language: | English |
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Indian Council of Agricultural Research
2022-01-01
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| Series: | The Indian Journal of Agricultural Sciences |
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| Online Access: | https://epubs.icar.org.in/index.php/IJAgS/article/view/120799 |
| _version_ | 1811169081003343872 |
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| author | PUSHPANJALI PUSHPANJALI JOSILY SAMUEL KISHORI LAL SHARMA PRABHAT KUMAR PANKAJ KARUNAKARAN KARTHIKEYAN KOTHA SAMMI REDDY |
| author_facet | PUSHPANJALI PUSHPANJALI JOSILY SAMUEL KISHORI LAL SHARMA PRABHAT KUMAR PANKAJ KARUNAKARAN KARTHIKEYAN KOTHA SAMMI REDDY |
| author_sort | PUSHPANJALI PUSHPANJALI |
| collection | DOAJ |
| description |
The selection of better polarisation and incidence angle for soil moisture retrieval using RISAT-1 microwave data was experimented at Hayathnagar research farm of ICAR-CRIDA, Hyderabad. Fine Resolution Sensor (FRS-1) data (spatial resolution of 3 m) and Medium Resolution ScanSAR (MRS) data (spatial resolution of 25 m) acquired from circular and dual polarised microwave data were used for the retrieval of soil moisture and to identify the best polarisation suitable for the study area. The evaluation was carried out during 2016-17. FRS-1 data was more accurate than MRS data for the extraction of soil moisture in the study area. Circular and dual-Polarisation retrieved soil moisture values were compared with volumetric soil moisture values for assessing the better polarisation. Dual polarisation and the incident angle between 15-20 degrees with R2=0.952 performed better as compared to circular polarisation with more or less than 20 degrees' incident angle. A correction factor of -0.723 was derived and applied to FRS-1 data with less than a 20-degree incident angle for getting real soil moisture values on the spatio-temporal basis to optimize the management of natural ecosystems under climate change threat.
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| first_indexed | 2024-04-10T16:36:22Z |
| format | Article |
| id | doaj.art-114674fa709d4fa28093906539e4ef01 |
| institution | Directory Open Access Journal |
| issn | 0019-5022 2394-3319 |
| language | English |
| last_indexed | 2024-04-10T16:36:22Z |
| publishDate | 2022-01-01 |
| publisher | Indian Council of Agricultural Research |
| record_format | Article |
| series | The Indian Journal of Agricultural Sciences |
| spelling | doaj.art-114674fa709d4fa28093906539e4ef012023-02-08T11:18:02ZengIndian Council of Agricultural ResearchThe Indian Journal of Agricultural Sciences0019-50222394-33192022-01-01911210.56093/ijas.v91i12.120799Evaluation of RISAT-1 data for soil moisture retrieval in semi-arid tropics of IndiaPUSHPANJALI PUSHPANJALI0JOSILY SAMUEL1KISHORI LAL SHARMA2PRABHAT KUMAR PANKAJ3KARUNAKARAN KARTHIKEYAN4KOTHA SAMMI REDDY5ICAR-Central Research Institute for Dryland Agriculture, Hyderabad, Telangana 500 059, IndiaICAR-Central Research Institute for Dryland Agriculture, Hyderabad, Telangana 500 059, IndiaICAR-Central Research Institute for Dryland Agriculture, Hyderabad, Telangana 500 059, IndiaICAR-Central Research Institute for Dryland Agriculture, Hyderabad, Telangana 500 059, IndiaICAR-National Bureau of Soil Survey and Land Use Planning, NagpurICAR-Central Research Institute for Dryland Agriculture, Hyderabad, Telangana 500 059, India The selection of better polarisation and incidence angle for soil moisture retrieval using RISAT-1 microwave data was experimented at Hayathnagar research farm of ICAR-CRIDA, Hyderabad. Fine Resolution Sensor (FRS-1) data (spatial resolution of 3 m) and Medium Resolution ScanSAR (MRS) data (spatial resolution of 25 m) acquired from circular and dual polarised microwave data were used for the retrieval of soil moisture and to identify the best polarisation suitable for the study area. The evaluation was carried out during 2016-17. FRS-1 data was more accurate than MRS data for the extraction of soil moisture in the study area. Circular and dual-Polarisation retrieved soil moisture values were compared with volumetric soil moisture values for assessing the better polarisation. Dual polarisation and the incident angle between 15-20 degrees with R2=0.952 performed better as compared to circular polarisation with more or less than 20 degrees' incident angle. A correction factor of -0.723 was derived and applied to FRS-1 data with less than a 20-degree incident angle for getting real soil moisture values on the spatio-temporal basis to optimize the management of natural ecosystems under climate change threat. https://epubs.icar.org.in/index.php/IJAgS/article/view/120799Microwave remote sensingRISAT-1Soil moisture |
| spellingShingle | PUSHPANJALI PUSHPANJALI JOSILY SAMUEL KISHORI LAL SHARMA PRABHAT KUMAR PANKAJ KARUNAKARAN KARTHIKEYAN KOTHA SAMMI REDDY Evaluation of RISAT-1 data for soil moisture retrieval in semi-arid tropics of India The Indian Journal of Agricultural Sciences Microwave remote sensing RISAT-1 Soil moisture |
| title | Evaluation of RISAT-1 data for soil moisture retrieval in semi-arid tropics of India |
| title_full | Evaluation of RISAT-1 data for soil moisture retrieval in semi-arid tropics of India |
| title_fullStr | Evaluation of RISAT-1 data for soil moisture retrieval in semi-arid tropics of India |
| title_full_unstemmed | Evaluation of RISAT-1 data for soil moisture retrieval in semi-arid tropics of India |
| title_short | Evaluation of RISAT-1 data for soil moisture retrieval in semi-arid tropics of India |
| title_sort | evaluation of risat 1 data for soil moisture retrieval in semi arid tropics of india |
| topic | Microwave remote sensing RISAT-1 Soil moisture |
| url | https://epubs.icar.org.in/index.php/IJAgS/article/view/120799 |
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