U.S. Automated Rendezvous and Capture Capabilities Review Category I - Hardware Systems Abstract Title: Author: Stanley C. Maki ,J 2/_ 7 7 Affiliation: General Dynamics, Space Systems Division P.O. Box 85990,San Diego, Ca. 92186-5990 MZ 24-8710 (619) 547-5364 (619) 974-4000 (FAX) Technical De!;ails: A different type of differential GPS (DGPS) configuration is described and compared to the standard DGPS configuration. Implementation options for either configuration for space and return are discussed. Historical Background: DGPS has been studied by numerous organizations as a highly sought after accuracy improvement to standard GPS, particularly with selective availabilitv applied. Flight tests of DGPS have been conducted by NASA LaRC and NAS,_, JSC. Technology Maturity: This is a first look at a different type of DGPS configuration. Promising anaivsis =w results should be followed up with experimental field testing. Implementation options will address use of current and near term technology. Sponsorship and Funding: Currently, the development of the DGPS For Space And Return is being pursued on IR&D funding. Biography: - Stanley C. Maki, as Advanced Avionics senior engineering specialist, is performing studies pertaining to low-cost application of the Global Positioning System (GPS)/Inertial Navigation System to space boosters. He was responsible for the Orbital Transfer V_hicle (OTV) avionics predesign with GPS application; more recently, he has been involved in Centaur GPS experiments and system analysis for the Multi-Path Redundant Avionics Suite (MPRAS) study, including a GPS element. Mr. Maki has been continuously engaged in space vehicle guidance and control since 1956, starting with design of the first space-flown solid-state digital flight sequencer for the Atlas intercontinental ballistic missile. He has a BSEE from the University of Minnesota and an MS in Engineering from the University of California at Los Angeles. P 6O w