Beam Pattern Measurements and Observational Evaluations of the ALMA/ACA 12-m Antenna

Details Beam Pattern Measurements and Observational Evaluations of the ALMA/ACA 12-m Antenna Beam Pattern Measurements and Observational Evaluations of the ALMA/ACA 12-m Antenna

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009pasj...61..451s&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.61, No.3, pp.451--459

Physics

Optics

1

Instrumentation: Optics, Millimeter/Submillimeter, Telescopes

Scientific paper

We have evaluated the beam pattern of the ALMA/ACA 12-m antenna with total power observations of Jupiter and the Moon. Models of the expected beam pattern as it passes across Jupiter and the Moon were derived in consideration of the radiation pattern of the actual receiving system and the surface error of the main reflector. Since the profiles of the measured beam patterns were consistent with those of the models within the range from the peak to -20dB, we confirmed that the antenna achieved the beam pattern expected from its optical design. After this confirmation, we performed astronomical observations. In addition to the detection of the CS J = 3--2 (146.969026GHz) spectrum toward Orion KL, the change in the Moon intensity was successfully detected during the total lunar eclipse during 2008 February 20--21. A time lag longer than 10min in the millimeter-wave eclipse relative to the corresponding optical eclipse ephemeris was detected. Mapping observations of the Sun revealed the structure of the chromospheric networks at 147GHz. These astronomical observations confirmed that the ACA 12-m antenna could be successfully operated under various operating conditions.

Affiliated with

Also associated with

No associations

Rating

Beam Pattern Measurements and Observational Evaluations of the ALMA/ACA 12-m Antenna 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 Beam Pattern Measurements and Observational Evaluations of the ALMA/ACA 12-m Antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Beam Pattern Measurements and Observational Evaluations of the ALMA/ACA 12-m Antenna will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1644120