[Simulation Analysis & Experimental Study of the Effects of Satellite Vibration Frequency and Amplitude on Hyperspectral Image].

In the imaging process of satellite-based pushbroom hyperspectral imager, attitude motions of satellite platform, represented by vibrations, will cause aliasing of the object information comes from different sub-areas of the detector, leading to degradation of hyperspectral image quality. In order to suppress and correct the imaging errors caused by satellite vibrations more effectively, spatial and spectral degradation mechanisms of typical dispersive pushbroom imaging spectrometer caused by satellite vibration are studied in this paper, including theoretical simulation and experimental study. With the analysis of spectral mixing process during exposure, the relationship between spectrum of ground object and satellite attitude is obtained, and a degradation model of pushbroom spectral imaging is presented.

[A Method for Retrieving Thermospheric O/N2 from Measurements of OI 130.4 nm Dayglow].

Thermospheric O/N2 can be retrieved from the radiance of OI 130.4 nm dayglow. In the paper, the algebraic relationship between the two variables is established, and the characteristics of the radiance varying with observing angle and solar zenith angles are discussed, based on which the look-up tables of the regularization factors are made up, thus putting up a method for retrieving thermospheric O/N2 from measurements of OI 130.

[Simulation of pseudo cross-correlation degraded by the hyperspectral imaging of satellite complex motion].

The present paper proposed a spectral degradation theory based on the point spread matrix, which is developed from the simulation algorithm of degradation based on differential dynamic spectral imaging for moving imaging. According to the eight neighborhood mixing model, considering the varying movement with time of the satellite platform, the situation that different object pixel has different point spread matrix is corresponding to the concept of the pseudo cross-correlation theory. Thus, the pseudo cross-correlation degradation theory of moving spectral imaging is presented.

[Research on retrieving thermospheric O/N2 from FUV remote sensing].

Magnetic storms usually cause significant departures of thermospheric O and N2 from their normal values. To study the effects on thermospheric neutral species caused by magnetic storms, a method to retrieve thermospheric O/N2 based on the data obtained from global ultraviolet imager on board TIMED is presented. With the help of AURIC, the normalizations of observing angles and SZAs were preformed to the measurements and a relationship between 135.