The Experts below are selected from a list of 1629 Experts worldwide ranked by ideXlab platform
W. Mccandless - One of the best experts on this subject based on the ideXlab platform.
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Seasat - A 25-year legacy of success
Remote Sensing of Environment, 2005Co-Authors: D.l. Evans, C Elachi, W. Alpers, A. Cazenave, T. Farr, D. Glackin, B. Holt, L. Jones, W. T. Liu, W. MccandlessAbstract:Thousands of scientific publications and dozens of textbooks include data from instruments derived from NASA's Seasat. The Seasat mission was launched on June 26, 1978, on an Atlas-Agena rocket from Vandenberg Air Force Base. It was the first Earth-orbiting satellite to carry four complementary microwave experitnents-the Radar Altimeter (ALT) to measure ocean surface topography by measuring spacecraft altitude above the ocean surface; the Seasat-A Satellite Scatterometer (SASS), to measure wind speed and direction over the ocean; the Scanning Multichannel Microwave Radiometer (SMMR) to measure surface wind speed, ocean surface temperature, atmospheric water vapor content, rain rate, and ice coverage; and the Synthetic Aperture Radar (SAR), to image the ocean surface, polar ice caps, and coastal regions. While originally designed for remote sensing of the Earth's oceans, the legacy of Seasat has had a profound impact in many other areas including solid earth science, hydrology, ecology and planetary science.
Stefan R M Ligtenberg - One of the best experts on this subject based on the ideXlab platform.
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four decades of antarctic surface elevation changes from multi mission satellite altimetry
The Cryosphere, 2019Co-Authors: Ludwig Schroder, Martin Horwath, Reinhard Dietrich, Veit Helm, Michiel R Van Den Broeke, Stefan R M LigtenbergAbstract:Abstract. We developed a multi-mission satellite altimetry analysis over the Antarctic Ice Sheet which comprises Seasat, Geosat, ERS-1, ERS-2, Envisat, ICESat and CryoSat-2. After a consistent reprocessing and a stepwise calibration of the inter-mission offsets, we obtained monthly grids of multi-mission surface elevation change (SEC) with respect to the reference epoch 09/2010 (in the format of month/year) from 1978 to 2017. A validation with independent elevation changes from in situ and airborne observations as well as a comparison with a firn model proves that the different missions and observation modes have been successfully combined to a seamless multi-mission time series. For coastal East Antarctica, even Seasat and Geosat provide reliable information and, hence, allow for the analysis of four decades of elevation changes. The spatial and temporal resolution of our result allows for the identification of when and where significant changes in elevation occurred. These time series add detailed information to the evolution of surface elevation in such key regions as Pine Island Glacier, Totten Glacier, Dronning Maud Land or Lake Vostok. After applying a density mask, we calculated time series of mass changes and found that the Antarctic Ice Sheet north of 81.5 ∘ S was losing mass at an average rate of - 85 ± 16 Gt yr −1 between 1992 and 2017, which accelerated to - 137 ± 25 Gt yr −1 after 2010.
D.l. Evans - One of the best experts on this subject based on the ideXlab platform.
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Seasat - A 25-year legacy of success
Remote Sensing of Environment, 2005Co-Authors: D.l. Evans, C Elachi, W. Alpers, A. Cazenave, T. Farr, D. Glackin, B. Holt, L. Jones, W. T. Liu, W. MccandlessAbstract:Thousands of scientific publications and dozens of textbooks include data from instruments derived from NASA's Seasat. The Seasat mission was launched on June 26, 1978, on an Atlas-Agena rocket from Vandenberg Air Force Base. It was the first Earth-orbiting satellite to carry four complementary microwave experitnents-the Radar Altimeter (ALT) to measure ocean surface topography by measuring spacecraft altitude above the ocean surface; the Seasat-A Satellite Scatterometer (SASS), to measure wind speed and direction over the ocean; the Scanning Multichannel Microwave Radiometer (SMMR) to measure surface wind speed, ocean surface temperature, atmospheric water vapor content, rain rate, and ice coverage; and the Synthetic Aperture Radar (SAR), to image the ocean surface, polar ice caps, and coastal regions. While originally designed for remote sensing of the Earth's oceans, the legacy of Seasat has had a profound impact in many other areas including solid earth science, hydrology, ecology and planetary science.
Ludwig Schroder - One of the best experts on this subject based on the ideXlab platform.
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four decades of antarctic surface elevation changes from multi mission satellite altimetry
The Cryosphere, 2019Co-Authors: Ludwig Schroder, Martin Horwath, Reinhard Dietrich, Veit Helm, Michiel R Van Den Broeke, Stefan R M LigtenbergAbstract:Abstract. We developed a multi-mission satellite altimetry analysis over the Antarctic Ice Sheet which comprises Seasat, Geosat, ERS-1, ERS-2, Envisat, ICESat and CryoSat-2. After a consistent reprocessing and a stepwise calibration of the inter-mission offsets, we obtained monthly grids of multi-mission surface elevation change (SEC) with respect to the reference epoch 09/2010 (in the format of month/year) from 1978 to 2017. A validation with independent elevation changes from in situ and airborne observations as well as a comparison with a firn model proves that the different missions and observation modes have been successfully combined to a seamless multi-mission time series. For coastal East Antarctica, even Seasat and Geosat provide reliable information and, hence, allow for the analysis of four decades of elevation changes. The spatial and temporal resolution of our result allows for the identification of when and where significant changes in elevation occurred. These time series add detailed information to the evolution of surface elevation in such key regions as Pine Island Glacier, Totten Glacier, Dronning Maud Land or Lake Vostok. After applying a density mask, we calculated time series of mass changes and found that the Antarctic Ice Sheet north of 81.5 ∘ S was losing mass at an average rate of - 85 ± 16 Gt yr −1 between 1992 and 2017, which accelerated to - 137 ± 25 Gt yr −1 after 2010.
W. Alpers - One of the best experts on this subject based on the ideXlab platform.
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Seasat - A 25-year legacy of success
Remote Sensing of Environment, 2005Co-Authors: D.l. Evans, C Elachi, W. Alpers, A. Cazenave, T. Farr, D. Glackin, B. Holt, L. Jones, W. T. Liu, W. MccandlessAbstract:Thousands of scientific publications and dozens of textbooks include data from instruments derived from NASA's Seasat. The Seasat mission was launched on June 26, 1978, on an Atlas-Agena rocket from Vandenberg Air Force Base. It was the first Earth-orbiting satellite to carry four complementary microwave experitnents-the Radar Altimeter (ALT) to measure ocean surface topography by measuring spacecraft altitude above the ocean surface; the Seasat-A Satellite Scatterometer (SASS), to measure wind speed and direction over the ocean; the Scanning Multichannel Microwave Radiometer (SMMR) to measure surface wind speed, ocean surface temperature, atmospheric water vapor content, rain rate, and ice coverage; and the Synthetic Aperture Radar (SAR), to image the ocean surface, polar ice caps, and coastal regions. While originally designed for remote sensing of the Earth's oceans, the legacy of Seasat has had a profound impact in many other areas including solid earth science, hydrology, ecology and planetary science.
