Open AccessPredictive filtering-based fast reacquisition approach for space-borne acquisition, tracking, and pointing systems
Author(s) -
Shan Bai,
Yunlong Wang,
Jia Qiang,
Liang Zhang,
Juanjuan Wang
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.026462
Subject(s) - tracking (education) , filter (signal processing) , computer science , trajectory , process (computing) , tracking system , free space optical communication , computer vision , control theory (sociology) , artificial intelligence , laser , optics , physics , psychology , pedagogy , control (management) , astronomy , operating system
We propose a novel approach for recapturing targets as quickly as possible after the space-borne ATP (Acquisition, Tracking, and Pointing) system target loss in free-space laser communication. The approach uses past angular information to predict the target trajectory. An optimized finite memory filter is designed as the prediction algorithm. To obtain optimal prediction performance, the designed filter determines the filter parameters of different curve parts during offline training, and the parameters are adjusted according to the curve characteristics during predictive filtering. Simulation results indicate prediction accuracy above 0.1 degrees within 5 seconds. An experimental system was constructed in the lab to simulate the reacquisition process using a dynamic target and a real ATP system. Experimental results show that, compared with the classical orbit prediction method, this approach can effectively yield shorter acquisition times.