2012 Vol. 41, No. 5
2012, 41(5): 1113-1118.
It is always a difficult problem to analyze the infrared radiation of space target. Sinda/G and Matlab were advanced to analyze the infrared radiation of space target. Firstly, the working principle of Sinda/G was introduced and the method used to analyze the infrared radiation of space target was explained in detail. In order to analyze the usefulness of the method in detail, Sinda/G and Matlab were used to analyze the infrared radiation intensity emitted from a spherical shell target. Besides, the infrared radiation intensity accepted by the detector was emulated both in different time and in different directions. The emulation results show that the method is of great significance to analyze the infrared radiation of the space target, to detect and track the space target.
2012, 41(5): 1119-1125.
The in-flight radiometric calibration for thermal bands of HJ-1B was described using the test site, Qinghai-lake based on the calibration of the thermal-infrared field radiometer CE312. Because of the instability of the onboard calibration, the high temperature point was hard to obtain, the single-point and two-point calibration methods were used to calculate the calibration coefficients respectively. The results were validated by the data of June 29, 2010 at the Dali-lake test site. It shows that the calibration coefficients calculated by the data of Qinghai-lake have high reliability. And the comparison between the methods of single-point calibration and two-point calibration show that the accuracy of two-point calibration method is better than the single-point one.
