|
|
|
| Study of Effect of Raw Data Compression on Space-borne InSAR Interferometry Based on Real Data |
| Qi Hai-ming①② Yu Wei-dong① |
| ①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100080, China) ②(Graduate School, Chinese Academy of Sciences, Beijing 100039, China) |
|
|
|
|
Abstract In order to study the effect of raw data compression on space-borne InSAR interferometry. This paper utilizes 4 typical ERS-1/2 raw data of different altitude to evaluate Block Adaptive Quantization (BAQ) and Amplitude-Phase (AP) algorithm. The numerical experiments results show that when BAQ is used, the block size should be chosen carefully. At the same time, 4 bit/sample is the least bit rate for precise SAR interferometry when the vertical baseline is short. When AP algorithm is used, the quantization bits should be distributed suitably. When the average bit rate is 3 bit/sample, the best choice of AP is 2 bits for amplitude quantization and 4 bits for phase quantization which performance is between 3 bit BAQ and 4 bit BAQ.
|
|
Received: 28 May 2007
|
|
|
|
Corresponding Authors:
Qi Hai-ming
|
|
|
|
|
|
|
2008, Vol. 30 
