3D TRUMP - A GBI Launch Window Tool

Steven N. Karels, John Hancock and Gary Matchett

Abstract:	A new GPS and communication link software analysis tool, called 3D TRUMP, has recently been developed for the Ground Based Interceptor (GBI) SD1 program. 3D TRUMP uses a computationally efficient analysis tool which pro- vides key GPS-based performance measures for an entire GBI mission (reentry vehicle and interceptor trajectories)for variable launch window times (i.e., a 3 hour window at one minute steps). Easy to understand color graphics show dilution of precision (DOP) conditions as a function of trajectory and window times. Communication link performance is considered for the GPS translator-based GBI mission in teh computation of satellite vehicle (SV) and ground transmitter (GT) signal availability. Weighted DOPs are computed to reference receiver (RR) visible SVs and non-RR visible SVs and GTs. The significance of this tool lies in the computationally efficient algorithms developed for 3D TRUMP. Typical execution times for a GBI mission (2 trajectories - total of 200 points; 3 hour launch window - 181 times steps) are under three minutes on a 486 PC. Algorithms and sample outputs are presented.
Published in:	Proceedings of the 1992 National Technical Meeting of The Institute of Navigation January 27 - 29, 1992 Catamaran Resort Hotel San Diego, CA
Pages:	401 - 406
Cite this article:	Karels, Steven N., Hancock, John, Matchett, Gary, "3D TRUMP - A GBI Launch Window Tool," Proceedings of the 1992 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 1992, pp. 401-406.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In