DSS subsystem implementation by time-shared computer
Multiprogramming subsystem implementation by time sharing computer in tracking station
Tausworthe, R. C.↗
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Refractivity influence on DSS Doppler data
Examination of deep space Doppler data for terrestrial media contamination
Leavitt, R. K.↗
DSS 14 operating noise temperature during Helios 1 near-sun tracking
When spacecraft are tracked near the line-of-sight of the sun, the ground antenna sidelobes see the solar noise. The solar noise increases the ground system operating noise temperature and degrades the downlink RF reception performance. At specific antenna azimuthal angles relative to the sun, noise peaks and nulls occur periodically throughout a day's tracking pass due to the quadripod support leg-generated sidelobes. This article documents this effect while tracking Helios 1, illustrates the time of the peaks, and compares the predicted time of the noise temperature peaks with the measured data.
Stelzried, C. T.↗
Terminology of ranging measurements and DSS calibrations
A set of basic terminology related to deep space ranging measurements is proposed. Calibration equations are derived for the dish-mounted zero delay device method for 26-m antenna systems and the translator method for 64-m antenna systems.
Komarek, T. A.↗
The 64-meter antenna pedestal tilt at DSS 43, Tidbinbilla, Australia
The present and possible future effects of pedestal tilt at the deep space tracking station are discussed. Topics include causes of the tilt, its amplitude and rate of change, and the method of measurement used. The degree of confidence in the measurements made is also examined.
Gale, G.↗
DSS 13 antenna subsystem automation
Unattended station operation was implemented that permitted full operational control from the network operations center (NOCC). Sensors were installed in the mechanical subsystem to monitor critical functions and to permit automated premission checkout of the subsystem, automated reaction to component failure, and identification of failed components under control of the antenna pointing computer. This monitoring installation is a prototype for monitoring equipment to be installed throughout the DSN.
Phillips, H.↗
The DSS radio science subsystem: Data handling of Very Long Baseline Interferometry (VLBI) data
The key characteristics functional requirements, and operation of the radio science subsystem are discussed as they pertain to usage of deep radio sources by the DSN VLBI system.
Berman, A. L.↗
Initial economic and operations data base for DSS 13 automation test
A summary is given of the data base collected for nine weeks of Deep Space Station II. Life cycle cost parameters on efficiency and productivity ratios, costs, and telemetry were calculated from this data base.
Remer, D. S.↗
Geotechnical investigation report for proposed array of six 40-meter diameter antennas, Pioneer site, DSS 11, Goldstone, California tracking complex
The geotechnical investigation was conducted in three disciplines: (1) geological field reconnaissance of the general area of proposed construction; (2) geophysical seismic refraction survey of the localized area surrounding the six proposed antenna sites, including shear wave velocity determination; and (3) detailed foundation engineering investigation of each of the six sites. The investigations indicate that the six sites selected are relatively free from geologic hazards which would inhibit the proposed construction or future antenna operations.
Sweitzer, J. S.↗
X-band atmospheric noise temperature data and statistics at Goldstone, DSS 13, 1977 - 1978
Sample data and cumulative distributions of atmospheric noise temperature increase above the quiescent baseline for the calendar years 1977 and 1978 are presented. Comparison is made with the existing Deep Space Network noise temperature statistics.
Slobin, S. D.↗
Utilization of the Venus Station (DSS 13) 26 meter antenna during CY 1979
The various activities for which the Venus Station's 26 m antenna was used are described and the number of manned tracking hours devoted to each activity are given. A brief description of the goal of each activity supported is provided, and, where appropriate, the observing technique is summarized. Projects involving spacecraft tracking, advanced systems development, and radio astronomy are included.
Jackson, E. B.↗
A prototype DSN X/S-band feed: DSS 13 application status
A prototype X/S-band common aperture horn feed for future use at various DSN sites and the Network Consolidation Program is discussed. The final design and fabrication of the second generation feedhorn and combiner is dealt with. The results of the measurements obtained with the second generation, full scale feed configuration are presented.
Williams, W.↗
DSS command software update
The modifications, additions, and testing results for a version of the Deep Space Station command software, generated for support of the Voyager Saturn encounter, are discussed. The software update requirements included efforts to: (1) recode portions of the software to permit recovery of approximately 2000 words of memory; (2) correct five Voyager Ground data System liens; (3) provide capability to automatically turn off the command processor assembly local printer during periods of low activity; and (4) correct anomalies existing in the software.
Stinnett, W. G.↗
DSS 14 64-meter antenna. Computed RF pathlength changes under gravity loadings
Using a computer model of the reflector structure and its supporting assembly of the 64-m antenna rotating about the elevation axis, the radio frequency (RF) pathlengths changes resulting from gravity loadings were computed. A check on the computed values was made by comparing the computed foci offsets with actual field readings of the Z or axial focussing required for elevation angle changes.
Katow, M. S.↗
X-band atmospheric noise temperature statistics at Goldstone, DSS 13, 1979 and 1980, and clear air noise temperature models for Goldstone
Superhigh frequency (X band) noise temperature data are presented which illustrate the noise temperature increase above quiescent baseline for the years 1979 and 1980. Clear air models are also given which shows the seasonal noise temperature effects of changing surface water vapor densities for a particular atmospheric model.
Slobin, S. D.↗
Evaluation of DSS-14 pedestal-review of top surface repair procedures
Proposed repair procedures for the top surface of the pedestal supporting the hydrostatic bearing runner for the 64m Antenna are presented. These procedures included: (1) removal of existing grout and concrete to approximately 8 in. below original concrete surface using a presplitting technique with expansive cement followed by secondary breaking; (2) preparation of exposed concrete surface including an epoxy bonding agent; and (3) replacement of material removed with 8 in. of new concrete surface including an epoxy bonding agent; and (4) replacement of material removed with 8 in. of new concrete and 4 in. of new grout.
Oesterle, R. G.↗
Repair of the DSS-14 Pedestal Concrete
About three years after the Goldstone Deep Space Station antenna was dedicated, grout under the hydrostatic bearing runner was found to be interacting with the runner, causing rust to form between the runner and the sole plates upon which it rests. The rust formed unevenly and the runner could not be kept flat so in 1969 the grout was removed and replaced with a Portland cement and sand dry pack grout that was less likely to produce rust. In the years that followed, oil leaking from the runner assembly caused progressive deterioration of the drypack grout. In 1982 over one thousand hours of spacecraft tracking time were lost due to this deterioration. A plan was developed to rehabilitate the bearing. The plan called for raising the rotating structure free from the concrete pedestal and placing it on three pairs of external support columns. With the weight of the structure transferred to the columns, the pads and runner could be removed and the repair started. The very successful repair included the replacement of a significant portion of the antenna pedestal.
Mcclure, D.↗
DSS 43 64-meter antenna S- and X-band efficiency and system noise temperature calibrations, January 1987
The Deep Space Network (DSN) 64-meter antenna in Australia has been calibrated prior to its upgrading to a 70-meter configuration in preparation for the Voyager Neptune encounter in August 1989. The S-band (2285 MHz) and X-band (8420 MHz) antenna area efficiency and system noise temperature calibrations were carried out during December 1986 and January 1987 to establish a baseline system performance for this station.
Slobin, S. D.↗