@misc{indiciaed961d8ee5ec2, title = {VIGIL--A GPS Based Target-Tracking System}, author = {Suddarth, S. and Brown, D. and Wysocky, T. and Howard, A. and Brenner, M. and Padgett, C. and Udomkesmalee, S. and Brown, K. and Liebe, C.}, year = {1998}, url = {https://ntrs.nasa.gov/citations/20210005321}, note = {Source identifier: 20210005321} }