Revealing the early ice flow patterns with historical Declassified Intelligence Satellite Photographs back to 1960s
Abstract The reconnaissance ARGON satellites collected the earliest images of Antarctica from space dating back to the 1960s, providing valuable historical baseline information for studying polar ice sheets. Those photographs are underutilized for ice motion mapping, due to lack of sufficient ground...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL068990 |
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| _version_ | 1850134540898533376 |
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| author | Shujie Wang Hongxing Liu Bailang Yu Guoqing Zhou Xiao Cheng |
| author_facet | Shujie Wang Hongxing Liu Bailang Yu Guoqing Zhou Xiao Cheng |
| author_sort | Shujie Wang |
| collection | DOAJ |
| description | Abstract The reconnaissance ARGON satellites collected the earliest images of Antarctica from space dating back to the 1960s, providing valuable historical baseline information for studying polar ice sheets. Those photographs are underutilized for ice motion mapping, due to lack of sufficient ground controls for image orthorectification. In this study, we orthorectified the ARGON photographs by fully exploiting the metric qualities of WorldView satellite images: very high spatial resolution and precise geolocation. Through a case study over Larsen Ice Shelf, we demonstrated that the camera model with bundle block adjustment can achieve geolocation accuracy of better than the nominal resolution (140 m) for orthorectifying ARGON images, with WorldView imagery as ground control source. This allowed us to extend the ice velocity records of Larsen Ice Shelf back into 1960s~1970s for the first time. The retrospective analysis revealed that acceleration of the collapsed Larsen B occurred much earlier than previously thought. |
| format | Article |
| id | doaj-art-e87ab251ce4d4cc8822e029ad6867def |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-e87ab251ce4d4cc8822e029ad6867def2025-08-20T02:31:41ZengWileyGeophysical Research Letters0094-82761944-80072016-06-0143115758576710.1002/2016GL068990Revealing the early ice flow patterns with historical Declassified Intelligence Satellite Photographs back to 1960sShujie Wang0Hongxing Liu1Bailang Yu2Guoqing Zhou3Xiao Cheng4Department of Geography University of Cincinnati Cincinnati Ohio USADepartment of Geography University of Cincinnati Cincinnati Ohio USAKey Laboratory of Geographic Information Science, Ministry of Education East China Normal University Shanghai ChinaGuangxi Key Laboratory for Geospatial Informatics and Geomatics Engineering Guilin University of Technology Guilin ChinaState Key Laboratory of Remote Sensing Science, College of Global Change and Earth System Science Beijing Normal University Beijing ChinaAbstract The reconnaissance ARGON satellites collected the earliest images of Antarctica from space dating back to the 1960s, providing valuable historical baseline information for studying polar ice sheets. Those photographs are underutilized for ice motion mapping, due to lack of sufficient ground controls for image orthorectification. In this study, we orthorectified the ARGON photographs by fully exploiting the metric qualities of WorldView satellite images: very high spatial resolution and precise geolocation. Through a case study over Larsen Ice Shelf, we demonstrated that the camera model with bundle block adjustment can achieve geolocation accuracy of better than the nominal resolution (140 m) for orthorectifying ARGON images, with WorldView imagery as ground control source. This allowed us to extend the ice velocity records of Larsen Ice Shelf back into 1960s~1970s for the first time. The retrospective analysis revealed that acceleration of the collapsed Larsen B occurred much earlier than previously thought.https://doi.org/10.1002/2016GL068990ice velocity mappingDeclassified Intelligence Satellite PhotographyARGONLarsen Ice Shelf |
| spellingShingle | Shujie Wang Hongxing Liu Bailang Yu Guoqing Zhou Xiao Cheng Revealing the early ice flow patterns with historical Declassified Intelligence Satellite Photographs back to 1960s Geophysical Research Letters ice velocity mapping Declassified Intelligence Satellite Photography ARGON Larsen Ice Shelf |
| title | Revealing the early ice flow patterns with historical Declassified Intelligence Satellite Photographs back to 1960s |
| title_full | Revealing the early ice flow patterns with historical Declassified Intelligence Satellite Photographs back to 1960s |
| title_fullStr | Revealing the early ice flow patterns with historical Declassified Intelligence Satellite Photographs back to 1960s |
| title_full_unstemmed | Revealing the early ice flow patterns with historical Declassified Intelligence Satellite Photographs back to 1960s |
| title_short | Revealing the early ice flow patterns with historical Declassified Intelligence Satellite Photographs back to 1960s |
| title_sort | revealing the early ice flow patterns with historical declassified intelligence satellite photographs back to 1960s |
| topic | ice velocity mapping Declassified Intelligence Satellite Photography ARGON Larsen Ice Shelf |
| url | https://doi.org/10.1002/2016GL068990 |
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