Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994slrr.work..101d&link_type=abstract
In its Satellite Laser Ranging in the 1990s: Report of the 1994 Belmont Workshop p 101-106 (SEE N95-14274 03-46)
Astronomy and Astrophysics
Astronomy
Charge Coupled Devices, Geophysical Observatories, Ground Support Systems, Laser Range Finders, Optical Tracking, Prototypes, Satellite Tracking, Signal Reception, Tracking Networks, Transponders, Azimuth, Electron Energy, Energy Levels, Flight Hazards, Geodesy, Mtbf, Personnel, Stability, Supports, Telescopes, Wharves
Scientific paper
SLR 2000 is a concept for a totally automated subcentimeter SLR system presently being studied at GSFC. If funding permits, a prototype would be installed and tested at the Goddard Geophysical and Astronomical Observatory (GCAO) in FY98 and a small number of automated stations would be fielded by the year 2000. Unlike present systems, the "SLR 2000" system is being designed to: 1) operate autonomously without the need for onsite operators; 2) present no hazards (i.e., optical, electrical, and/or chemical) to personnel in the vicinity or to overflying aircraft; and 3) have a mean time between failures (MTBF) of at least three months. It is assumed that the systems are located at "friendly" sites where some level of security is provided and where certain low level service functions (e.g. commercial power, communications, heat pump service cleaning, etc.) are available or can be contracted for locally on an as-needed basis. The main system consists of two parts - an optical head and electronics rack. The optical head contains the laser transmitter and power supply, transmit/receive switch, optical telescope, tracking angle sensor (intensified CCD camera), detector and power supply, two angular encoders, azimuth and elevation motors, and a protective dome. The optical head mounts directly to the top of a concrete pier which contains the geodetic monument and forms part of the environmental housing for the hardware and servicing personnel. It is equipped with electronic levels for leveling the mount and monitoring its stability.
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