| Highly Accurate DSM Reconstruction Using Ku-Band Airborne InSAR |
| Citation: |
Yu Okada, Chie Hirao, Takeshi Horiuchi, Yoshihisa Hara, Jonathan Yedidia, Ali Azarbayejani, Noboru Oishi, Masatada Furuhata, Nobuo Kumagai, Shouji Morioka, Yoshihiko Kato, "Highly Accurate DSM Reconstruction Using Ku-Band Airborne InSAR", IGARSS 2007, August 2007 |
| Date: | August 2007 |
| MERL Contacts: | Jonathan Yedidia,
Ali Azarbayejani |
We present a newly developed airborne InSAR system incorporating a novel phase unwrapping algorithm, capable of retrieving a highly accurate Digital Surface Model (DSM). The SAR sensor system, with a spatial resolution of 30 cm, is carried on an airborne platform which has two antennas placed at a baseline length of 1 meter. We have established a DSM reconstruction processing technique, which includes the new "Iterated Conditional Modes-Minimum Cost Flow" (ICM-MCF) phase-unwrapping algorithm. The ICM-MCF algorithm finds a locally optimal configuration of unwrapped phases under a well-characterized statistical model of the terrain and noise. An experimental field observation was carried out in Tsukuba, Japan. The DSM was generated, and the height accuracy of the SAR-DSM was evaluated by comparing with laser pro-filer data. For 50 cm X 50 cm mesh an accuracy of better than 50 cm in height was confirmed. |
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