Reduction of Tropospheric Noise Fluctuations at Centimetre Wavelengths

Details Reduction of Tropospheric Noise Fluctuations at Centimetre Wavelengths Reduction of Tropospheric Noise Fluctuations at Centimetre Wavelengths

Oct 1966

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1966natur.212..494b&link_type=abstract

Nature, Volume 212, Issue 5061, pp. 494-495 (1966).

Astronomy and Astrophysics

Astronomy

14

Scientific paper

SOME time ago, Conway1 suggested the use of a special technique for radio astronomical observations at centimetre wavelengths. It should eliminate the influence of radiation fluctuations from the troposphere on the sensitivity of the radio telescope. This communication reports the success of tests at wavelengths of 9.5 mm and 2 and 6 cm on a 140 ft. telescope. The radiometer is switched between two feed horns, both located close to the focal point of the paraboloid, and the difference in power is recorded. Two similar beams are projected on the sky separated by some angle. Close to the antenna (in the Fresnel region) the cylindrical beams overlap partially. By keeping the source in one of the beams only, we can measure its flux density and simultaneously cancel the atmospheric noise, because it enters the two overlapping beams. The method is restricted to observations of sources with angular extent less than the beam separation.

Affiliated with

Also associated with

No associations

Rating

Reduction of Tropospheric Noise Fluctuations at Centimetre Wavelengths does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Reduction of Tropospheric Noise Fluctuations at Centimetre Wavelengths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduction of Tropospheric Noise Fluctuations at Centimetre Wavelengths will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1343735