Effective for period between Nov. 2004 - May 2006 (Measured in Nov. 2004 and in Dec. 2005)
In Dec. 2005 we measured the beam size and the efficiencies only at 110 GHz using S80 and S100, though the data are rather limited due to the system troubles in autumn and to poor weather conditions. The measured values were similar (no significant changes) to the values measured in 2004. From this result, it is also thought that the beam sizes and the efficiencies are the same as those of 2001 in lower frequency bands.
In Nov. 2004 we measured the beam size and the efficiencies only at 110 GHz and 115 GHz using S80 and S100. The measured values were in good agreement with the values measured in 2001, 2002 and 2003. From this result, it is also thought that the beam sizes and the efficiencies are the same as those of 2001 in lower frequency bands.
Measured in Nov.2004
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Receiver Frequency HPBW Aperture Main beam Calib. EL. comment
(GHz) (arcsec) effic(%) effic(%) source
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S80 110 15.0+-0.2 30+-3 38+-3 Saturn 55-66
3C273 20-30
115 14.6+-0.2 23+-2 30+-2 Saturn 33-50
3C279 26-39
S100 110 15.0+-0.2 35+-3 45+-3 Saturn 55-66
3C273 20-30
115 14.6+-0.1 29+-2 39+-3 Saturn 33-50
3C279 26-39
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*The details of a measuring method are the same as the last year.
Refer to Antenna Efficiency(2001-2002) for the values in all frequency bands.
