title: Interferometric observations of an artificial satellite.
abstract: Very-long-baseline interferometric observations of radio signals from the TACSAT synchronous satellite, even though extending over only 7 hours, have enabled an excellent orbit to be deduced. Precision in differenced delay and delay-rate measurements reached 0.15 nanosecond ( approximately 5 centimeters in equivalent differenced distance) and 0.05 picosecond per second ( approximately 0.002 centimeter per second in equivalent differenced velocity), respectively. The results from this initial three-station experiment demonstrate the feasibility of using the method for accurate satellite tracking and for geodesy. Comparisons are made with other techniques.
authors.forename: R A
authors.initials: RA
authors.lastname: Preston
authors.forename: R
authors.initials: R
authors.lastname: Ergas
authors.forename: H F
authors.initials: HF
authors.lastname: Hinteregger
authors.forename: C A
authors.initials: CA
authors.lastname: Knight
authors.forename: D S
authors.initials: DS
authors.lastname: Robertson
authors.forename: I I
authors.initials: II
authors.lastname: Shapiro
authors.forename: A R
authors.initials: AR
authors.lastname: Whitney
authors.forename: A E
authors.initials: AE
authors.lastname: Rogers
authors.forename: T A
authors.initials: TA
authors.lastname: Clark