Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.213..101r&link_type=abstract
In ESA QUASAT: A VLBI Obs. in Space p 101-110 (SEE N85-16700 07-88)
Astronomy and Astrophysics
Astronomy
Image Resolution, Quasat, Radio Sources (Astronomy), Spaceborne Astronomy, Very Long Base Interferometry, Astronomical Maps, Satellite Ground Support, Satellite Orbits, Signal To Noise Ratios, Systems Simulation
Scientific paper
The orbit, ground array, and sensitivities of the space and ground systems of the QUASAT spaceborne astronomy mission were studied. Parameters which yield images in which the noise is within a factor of three of the thermal noise limit were derived. With a very large ground array QUASAT should produce images as complex as the best of the VLA. At 22 GHz the resolution will be 0.1 milliarcsec, the field of view 15 milliarcsec, and it will be possible to make noise limited maps of complex objects. The QUASAT is essential for mapping southern declination objects. Without QUASAT, even the simple core-jet source cannot be mapped at declination minus 60 deg. It will be possible with QUASAT to make maps with observing times as short as 6 hr although the very best maps will require 48 hr observations.
Bolton Scott
Burke Bernard F.
Dhawan Vivek
Evans Franklin K.
Johnston Ken J.
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