中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 24 No. 3 March 2014 |
（1. School of Geoscience and Info-Physics Engineering, Central South University, Changsha 410083, China;
2. Geology Surveying and Mapping Institute of Guangdong Province, Guangzhou 510800, China）
Abstract:Empirical functional models for the maximum and minimum detectable deformation gradient of PALSAR interferometry were established based on coherence and discrete look numbers. Then, a least square regression method was used to fit the model coefficients and thus obtain the generalized functional models for both coherence and look numbers. The experimental results with ALOS PALSAR data of Wenchuan earthquake of China show that the new model works well for judging whether the deformation gradient can be detected by the D-InSAR technology or not. The results can help researchers to choose PALSAR data and to configure processing parameters, and also benefit the interpretation of the measured surface deformation.
Key words: PALSAR; D-InSAR; deformation gradient; coherence; multilook number; functional model
