Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 2015 IEEE 5th Asia-Pacific Conference on Synthetic Aperture Radar |
| Subtitle of host publication | APSAR 2015 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 143-147 |
| Number of pages | 5 |
| ISBN (electronic) | 9781467372961 |
| Publication status | Published - Oct 2015 |
| Event | 5th IEEE Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2015 - Singapore, Singapore Duration: 1 Sept 2015 → 4 Sept 2015 |
Abstract
The image quality of an image processing technique in a real airborne spotlight Synthetic Aperture Radar scenario mainly depends on its capability of correcting motion error effects. Therefore we compare the frequency domain imaging technique rotated Omega-K with explicit range cell migration correction with the time domain algorithm global Backprojection in their imaging quality by taking motion errors and scene size as well as the squint and the depression angles into account. The numerical investigations show that for a squint angle of 20° and a depression angle of 25° up to a limit of 5m motion error magnitude Omega-K yields good image quality in terms of Integrated Side Lobe Ratio for point targets with 200 m ground range distance to the spot center. For larger motion errors or larger scene sizes the Backprojection algorithm should be used to guarantee image quality with the disadvantage of higher computational costs.
Keywords
- Azimuth, Frequency-domain analysis, Image quality, Motion compensation, Spatial resolution, Standards, Synthetic aperture radar
ASJC Scopus subject areas
- Computer Science(all)
- Signal Processing
- Physics and Astronomy(all)
- Instrumentation
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Proceedings of the 2015 IEEE 5th Asia-Pacific Conference on Synthetic Aperture Radar: APSAR 2015. Institute of Electrical and Electronics Engineers Inc., 2015. p. 143-147 7306175.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Comparison of Omega-K and Backprojection regarding Spatial Resolution for Squinted Spotlight SAR with Motion Errors
AU - Sommer, Aron
AU - Nguyen, Minh Phuong
AU - Ostermann, Jörn
PY - 2015/10
Y1 - 2015/10
N2 - The image quality of an image processing technique in a real airborne spotlight Synthetic Aperture Radar scenario mainly depends on its capability of correcting motion error effects. Therefore we compare the frequency domain imaging technique rotated Omega-K with explicit range cell migration correction with the time domain algorithm global Backprojection in their imaging quality by taking motion errors and scene size as well as the squint and the depression angles into account. The numerical investigations show that for a squint angle of 20° and a depression angle of 25° up to a limit of 5m motion error magnitude Omega-K yields good image quality in terms of Integrated Side Lobe Ratio for point targets with 200 m ground range distance to the spot center. For larger motion errors or larger scene sizes the Backprojection algorithm should be used to guarantee image quality with the disadvantage of higher computational costs.
AB - The image quality of an image processing technique in a real airborne spotlight Synthetic Aperture Radar scenario mainly depends on its capability of correcting motion error effects. Therefore we compare the frequency domain imaging technique rotated Omega-K with explicit range cell migration correction with the time domain algorithm global Backprojection in their imaging quality by taking motion errors and scene size as well as the squint and the depression angles into account. The numerical investigations show that for a squint angle of 20° and a depression angle of 25° up to a limit of 5m motion error magnitude Omega-K yields good image quality in terms of Integrated Side Lobe Ratio for point targets with 200 m ground range distance to the spot center. For larger motion errors or larger scene sizes the Backprojection algorithm should be used to guarantee image quality with the disadvantage of higher computational costs.
KW - Azimuth
KW - Frequency-domain analysis
KW - Image quality
KW - Motion compensation
KW - Spatial resolution
KW - Standards
KW - Synthetic aperture radar
UR - http://www.scopus.com/inward/record.url?scp=84957674282&partnerID=8YFLogxK
U2 - 10.1109/apsar.2015.7306175
DO - 10.1109/apsar.2015.7306175
M3 - Conference contribution
AN - SCOPUS:84957674282
SP - 143
EP - 147
BT - Proceedings of the 2015 IEEE 5th Asia-Pacific Conference on Synthetic Aperture Radar
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 5th IEEE Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2015
Y2 - 1 September 2015 through 4 September 2015
ER -