Astronomy and Astrophysics – Astronomy
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983lsas.rept...61h&link_type=abstract
In NASA. Langley Research Center Large Space Antenna Systems Technol., Pt. 1 p 61-80 (SEE N83-26853 16-15)
Astronomy and Astrophysics
Astronomy
Antenna Arrays, Astronomical Observatories, Heat Exchangers, Structural Design, Surface Roughness, Very Long Base Interferometry, Cooling, Cryogenics, Error Signals, Field Effect Transistors, Mathematical Models, Noise Temperature, Space Shuttle Payloads, Star Trackers
Scientific paper
Since it is not economically feasible to construct steerable antennas much larger than 100 meters on Earth (400 meters for fixed telescopes), radio interferometry became a very useful technique for high resolution astronomy observations of quasars, galactic nuclei, and interstellar hydroxyl (OH) and water vapor (H2O) masers. The subsystems necessary to do the space VLBI experiment appear are available but require space qualifications. There are several 50-meter antenna concepts that could be used. Certainly there are problems to be solved. Feed positioning with respect to reflector, pointing such a large structure to accuracy indicated, and integration into the Shuttle control system are all significant engineering challenges. However, there are no problems that are insurmountable in the latter part of this decade.
Hamilton Charles E.
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