Improved BAQ algorithm for Tiangong-2 interferometric imaging radar data compression
Tiangong-2 interferometric imaging radar altimeter (InIRA), the first space-borne radar altimeter in the world, applying a new mechanism of interferometry with short baseline and small incident angle, can achieve wide swath and high accuracy sea surface height measuring. Comparing to traditional alt...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-07-01
|
| Series: | The Journal of Engineering |
| Subjects: | |
| Online Access: | https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0140 |
| _version_ | 1818725822746329088 |
|---|---|
| author | Xiaojin Shi Yunhua Zhang Xiao Dong |
| author_facet | Xiaojin Shi Yunhua Zhang Xiao Dong |
| author_sort | Xiaojin Shi |
| collection | DOAJ |
| description | Tiangong-2 interferometric imaging radar altimeter (InIRA), the first space-borne radar altimeter in the world, applying a new mechanism of interferometry with short baseline and small incident angle, can achieve wide swath and high accuracy sea surface height measuring. Comparing to traditional altimeter, InIRA can obtain SAR image of observation area, which means InIRA needs higher AD sampling rate. Due to the limitation of satellite on-board storage and downlink speed, in order to extend the working time of InIRA, data compression algorithm for InIRA must be studied. Block adaptive quantisation (BAQ) is an efficient and widely adopted approach for space-borne SAR raw data compression. Based on the characters of InIRA echo waveform, this study discusses compressing InIRA raw data by changing quantisation bits and size of blocks of BAQ algorithm to achieve higher compression ratio and less sea surface height error. |
| first_indexed | 2024-12-17T21:48:25Z |
| format | Article |
| id | doaj.art-4669ff9bd76b404c828cfd9a1d57d297 |
| institution | Directory Open Access Journal |
| issn | 2051-3305 |
| language | English |
| last_indexed | 2024-12-17T21:48:25Z |
| publishDate | 2019-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Journal of Engineering |
| spelling | doaj.art-4669ff9bd76b404c828cfd9a1d57d2972022-12-21T21:31:24ZengWileyThe Journal of Engineering2051-33052019-07-0110.1049/joe.2019.0140JOE.2019.0140Improved BAQ algorithm for Tiangong-2 interferometric imaging radar data compressionXiaojin Shi0Yunhua Zhang1Xiao Dong2Chinese Academy of SciencesChinese Academy of SciencesChinese Academy of SciencesTiangong-2 interferometric imaging radar altimeter (InIRA), the first space-borne radar altimeter in the world, applying a new mechanism of interferometry with short baseline and small incident angle, can achieve wide swath and high accuracy sea surface height measuring. Comparing to traditional altimeter, InIRA can obtain SAR image of observation area, which means InIRA needs higher AD sampling rate. Due to the limitation of satellite on-board storage and downlink speed, in order to extend the working time of InIRA, data compression algorithm for InIRA must be studied. Block adaptive quantisation (BAQ) is an efficient and widely adopted approach for space-borne SAR raw data compression. Based on the characters of InIRA echo waveform, this study discusses compressing InIRA raw data by changing quantisation bits and size of blocks of BAQ algorithm to achieve higher compression ratio and less sea surface height error.https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0140altimetersspaceborne radardata compressionradar imagingradar interferometryBAQ algorithmTiangong-2 interferometric imaging radar data compressionTiangong-2 interferometric imaging radar altimeterspace-borne radar altimeterhigh accuracy sea surface height measuringSAR imagesatellite on-board storagedownlink speeddata compression algorithmspace-borne SAR raw data compressionInIRA raw datahigher compression ratiosea surface height error |
| spellingShingle | Xiaojin Shi Yunhua Zhang Xiao Dong Improved BAQ algorithm for Tiangong-2 interferometric imaging radar data compression The Journal of Engineering altimeters spaceborne radar data compression radar imaging radar interferometry BAQ algorithm Tiangong-2 interferometric imaging radar data compression Tiangong-2 interferometric imaging radar altimeter space-borne radar altimeter high accuracy sea surface height measuring SAR image satellite on-board storage downlink speed data compression algorithm space-borne SAR raw data compression InIRA raw data higher compression ratio sea surface height error |
| title | Improved BAQ algorithm for Tiangong-2 interferometric imaging radar data compression |
| title_full | Improved BAQ algorithm for Tiangong-2 interferometric imaging radar data compression |
| title_fullStr | Improved BAQ algorithm for Tiangong-2 interferometric imaging radar data compression |
| title_full_unstemmed | Improved BAQ algorithm for Tiangong-2 interferometric imaging radar data compression |
| title_short | Improved BAQ algorithm for Tiangong-2 interferometric imaging radar data compression |
| title_sort | improved baq algorithm for tiangong 2 interferometric imaging radar data compression |
| topic | altimeters spaceborne radar data compression radar imaging radar interferometry BAQ algorithm Tiangong-2 interferometric imaging radar data compression Tiangong-2 interferometric imaging radar altimeter space-borne radar altimeter high accuracy sea surface height measuring SAR image satellite on-board storage downlink speed data compression algorithm space-borne SAR raw data compression InIRA raw data higher compression ratio sea surface height error |
| url | https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0140 |
| work_keys_str_mv | AT xiaojinshi improvedbaqalgorithmfortiangong2interferometricimagingradardatacompression AT yunhuazhang improvedbaqalgorithmfortiangong2interferometricimagingradardatacompression AT xiaodong improvedbaqalgorithmfortiangong2interferometricimagingradardatacompression |