TY - RPRT TI - Differential Very Long Baseline Interferometry (delta VLBI) spacecraft tracking system demonstration. Part 2: Data acquisition and processing AU - Christensen, C. S. AU - Moultrie, B. AU - Callahan, P. S. AU - Donivan, F. F. AU - Wu, S. C. PY - 1980 UR - https://ntrs.nasa.gov/citations/19810004704 ID - 19810004704 ER -