Proceedings of the IEEE · 1973 · 30 citations · 11 references
EngineeringAerospace EngineeringElectrical EngineeringAntennasMicrowave EngineeringRadio AstronomyBeamformingCommunications SubsystemsMicrowave AntennasMicrowave MeasurementsRadar AntennasReceiver SystemsDeep Space Communication LinksExploration MissionsGlobal Navigation Satellite System AntennasSpace Communication SystemsVery Long Baseline InterferometryVery Long Baseline Interferometry (Vlbi)
The Deep‑Space Network is a worldwide system of 25‑ and 64‑m antennas spaced roughly 120° apart, providing precision communications with unmanned spacecraft at interplanetary distances and must remain state‑of‑the‑art as mission complexity and ranges increase. To achieve this, a long‑term development program has been pursued on large antennas, low‑noise maser receivers, phase‑locked receiving systems, and high‑power transmitters. The program concentrates on building low‑noise microwave receiving systems—including maser receivers and phase‑locked loops—and high‑power transmitters for the DSN antennas. Recent advances in antenna and maser receiver performance have enhanced radio‑science projects such as planetary radar, very long baseline interferometry, pulsar, and other astronomical observations, and these measurements have been used to evaluate the antenna‑receiver system performance.
The Deep-Space Network (DSN) consists of a world-wide network of 25- and 64-m antennas spaced approximately 120° around the world. The DSN is a precision communications system designed to communicate with and control unmanned spacecraft traveling at interplanetary ranges. The ever increasing complexity and distances of spacecraft missions require that the network capability be kept at the state of the art of telecommunications. To meet this objective, a continuing development program on large antennas, low-noise maser, phase-locked receiving systems, and high-power transmitters has been underway for some years. Recent developments in the performance and evaluation of the antennas and maser receivers are discussed, and developments which have contributed to radio science projects, such as planetary radar astronomy, very long baseline interferometry, pulsar, and other astronomical observations are described. It is also shown how these radio science measurements have been used to evaluate the performance of the antenna-receiver systems.
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Occultation Experiment: Results of the First Direct Measurement of Mars's Atmosphere and Ionosphere
A. J. Kliore, D. L. Cain, G. S. Levy et al. · Science · 1965 · 345 citations
Quasars Revisited: Rapid Time Variations Observed Via Very-Long-Baseline Interferometry
A. R. Whitney, I. I. Shapiro, A. E. E. Rogers et al. · Science · 1971 · 178 citations
Natural Sciences, Astronomy, Physics +13
Atmosphere and Ionosphere of Venus from the Mariner V S-Band Radio Occultation Measurement
A. J. Kliore, G. S. Levy, D. L. Cain et al. · Science · 1967 · 163 citations
Quasars: Millisecond-of-Arc Structure Revealed by Very-Long-Baseline Interferometry
C. A. Knight, D. S. Robertson, A. E. E. Rogers et al. · Science · 1971 · 63 citations
Natural Sciences, Astronomy, Physics +12