Analysis of SNR for High-Orbit Target Detected by Ground-Based Photoelectric System.

Featured Application: 1. By calculation, the signal-to-noise ratio of some infrared bands imaging for high-orbit extended spacecrafts is sufficient under the right conditions. 2. Successfully build a K-band infrared imaging terminal applied on a 1.23 m photoelectric telescope. 3. Through the observational imaging experiment, the results of high-orbit objects verified the simulation calculation. To determine the feasibility of observing high-orbit targets with a large aperture telescope, we created a simulation based on electronics to evaluate the signal-to-noise ratio (SNR) model for an infrared ground-based photoelectric system. Atmosphere transmission and sky background radiation data were obtained using MODTRAN software, then the SNRs of the high-orbit target (HOT) in different temperatures and orbit heights were calculated separately. The results showed that the observation of the HOT in a short band was possible, and the effect of short-wave was excellent at low temperatures. On the basis of this model, some space targets were observed by a K-band photoelectric telescope for verification and had constructive results. Thus, the model can be used as a basis for whether a HOT can be detected. [ABSTRACT FROM AUTHOR]