The Efficiencies of the 45-m Radiotelescope in 2012-2013 Observing Seasons

Measured between December 2012 - April 2013

The error of the efficiencies is mainly due to uncertainty of brightness temperature of the planet.

Brightness Temperatures (T_b) of the Source (We used temperatures compiled by Shibata 1990)
Saturn
- 115 GHz: 155+-11 K (Interpolation of the values at 2.1 mm and 3.1 mm)
- 110 GHz: 153+-11 K (Interpolation of the values at 2.1 mm and 3.1 mm)
- 86 GHz: 153+-5 K
Jupiter
- 43, 49 GHz 152.4+-4.8 K (temperature at 31.4 GHz by Ulich 1981)
Diameter of the Planet
The value is taken from the ASTRONOMICAL ALMANAC.
For example, the diameter of Saturn, 17.791 (arcsec), was used for the measurements of TZ1 (April 1, 2013).
References
- Shibata, Internal Memorandum: Brightness temperatures of Venus, Mars, and Saturn (1990)
- THE ASTRONOMICAL ALMANAC(2012)
- THE ASTRONOMICAL ALMANAC(2013)
- Ulich, Astron. J. 86, 1619 (1981)

2013-05-30

Reciver	Frequency [GHz]	HPBW [arcsec]	Main Beam Effic [%]	Aperture Effic [%]	Calib. source	EL	comments

S40	43	39.6+-0.1	76+-5	56+-4	Jupiter	31 - 30
					3C279	30 - 31
	49	34.2+-0.3	74+-5	56+-4	Jupiter	65 - 68
					3C279	34 - 37

S80	86	19.1+-0.1	34+-2	27+-2	Saturn	71 - 69
					3C279	41 - 44
	110	16.0+-0.2	27+-2	19+-1	Saturn	59 - 55
					3C279	27 - 31

S100	86	18.5+-0.1	39+-3	33+-2	Saturn	71 - 69
					3C279	41 - 44
	110	15.2+-0.2	36+-3*	28+-2	Saturn	59 - 55
					3C279	27 - 31
	115	15.3+-0.8	27+-2	19+-1	Saturn	47 - 43
					3C279	34 - 38

TZ(H)	86	19.2+-0.2	36+-3	28+-2	Saturn	57 - 60
					3C279	41 - 60
	110	16.1+-0.1	31+-2	21+-2	Saturn	39 - 42
					3C279	40 - 43
	115	15.4+-0.1	31+-2	19+-2	Saturn	44 - 46
					3C279	44 - 46

TZ(V)	86**	---	---	---	---	---
					---	---
	110	16.1+-0.1	31+-2	21+-2	Saturn	39 - 42
					3C279	40 - 43
	115	15.4+-0.1	31+-2	19+-2	Saturn	44 - 46
					3C279	44 - 46

The Efficiencies of the 45-m Radiotelescope during 2012-2013