The Efficiencies of the 45-m Radiotelescope in 2014-2015 Observing Seasons

Measured between March - May 2015


    
    
    Reciver

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

      
    
    S100
    86
    19.0+-0.4
    43+-1
    35+-1
    Saturn
    23.1 - 28.7
    	
    
    110
    17.1+-0.4
    38+-1
    23+-1
    Saturn
    26.8 - 29.4
    	
    
    115
    16.7+-0.3
    36+-2
    21+-1
    Saturn
    21.3 - 24.6
    	
    
    

    	

      
    
    TZ1(H)
    86
    20.4+-0.4
    49+-2
    34+-1
    Saturn
    24.6 - 34.4
    	
    
    110
    16.6+-0.4
    41+-3
    26+-2
    Saturn
    35.0 - 35.1
    	
    
    115
    15.1+-0.3
    39+-3
    27+-2
    Saturn
    35.0 - 34.3
    	
    
    

    	

      
    
    TZ1(V)
    86
    20.4+-0.4
    48+-2
    34+-2
    Saturn
    24.6 - 34.4
    	
    
    110
    16.6+-0.4
    42+-3
    27+-2
    Saturn
    35.0 - 35.1
    	
    
    115
    15.6+-0.3
    40+-2
    27+-2
    Saturn
    35.0 - 34.3
    	
    
    

    	

      
    
    TZ2(H)
    86
    19.5+-0.5
    45+-1
    34+-1
    Saturn
    24.6 - 27.7
    	
    
    110
    17.0+-0.4
    39+-3
    24+-2
    Saturn
    34.6 - 33.5
    	
    
    115
    16.0+-0.4
    38+-3
    23+-2
    Saturn
    32.7 - 30.8
    	
    
    

    	

      
    
    TZ2(V)
    86
    19.6+-0.4
    44+-1
    33+-1
    Saturn
    24.6 - 27.7
      
    
    110
    16.9+-0.4
    41+-3
    25+-2
    Saturn
    34.6 - 33.5
      
    
    115
    16.3+-0.4
    39+-3
    23+-2
    Saturn
    32.7 - 30.8
      
    
    

      

      
    
    T70(H)
    75
    21.7+-0.4
    48+-2
    38+-1
    Saturn
    33.6 - 34.6
      
    
    86
    20.7+-0.5
    45+-1
    30+-1
    Saturn
    26.2 - 29.0
      
    
    

      

      
    
    T70(V)
    75
    21.6+-0.4
    48+-2
    39+-1
    Saturn
    33.6 - 34.6
      
    
    86
    20.7+-0.5
    46+-1
    31+-1
    Saturn
    26.2 - 29.0
      
    
    

      

      
    
    FOREST
    115
    16.0+-0.4
    39+-3
    24+-2
    Saturn
    18.6 - 25.6
    an average of Beam 1H and 1V

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
Diameter of the Planet
The value is taken from the ASTRONOMICAL ALMANAC.
References
- Shibata, Internal Memorandum: Brightness temperatures of Venus, Mars, and Saturn (1990)
- THE ASTRONOMICAL ALMANAC(2014)
- THE ASTRONOMICAL ALMANAC(2015)
- Ulich, Astron. J. 86, 1619 (1981)

2015-05-26

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

S100	86	19.0+-0.4	43+-1	35+-1	Saturn	23.1 - 28.7
	110	17.1+-0.4	38+-1	23+-1	Saturn	26.8 - 29.4
	115	16.7+-0.3	36+-2	21+-1	Saturn	21.3 - 24.6

TZ1(H)	86	20.4+-0.4	49+-2	34+-1	Saturn	24.6 - 34.4
	110	16.6+-0.4	41+-3	26+-2	Saturn	35.0 - 35.1
	115	15.1+-0.3	39+-3	27+-2	Saturn	35.0 - 34.3

TZ1(V)	86	20.4+-0.4	48+-2	34+-2	Saturn	24.6 - 34.4
	110	16.6+-0.4	42+-3	27+-2	Saturn	35.0 - 35.1
	115	15.6+-0.3	40+-2	27+-2	Saturn	35.0 - 34.3

TZ2(H)	86	19.5+-0.5	45+-1	34+-1	Saturn	24.6 - 27.7
	110	17.0+-0.4	39+-3	24+-2	Saturn	34.6 - 33.5
	115	16.0+-0.4	38+-3	23+-2	Saturn	32.7 - 30.8

TZ2(V)	86	19.6+-0.4	44+-1	33+-1	Saturn	24.6 - 27.7
	110	16.9+-0.4	41+-3	25+-2	Saturn	34.6 - 33.5
	115	16.3+-0.4	39+-3	23+-2	Saturn	32.7 - 30.8

T70(H)	75	21.7+-0.4	48+-2	38+-1	Saturn	33.6 - 34.6
T70(H)	86	20.7+-0.5	45+-1	30+-1	Saturn	26.2 - 29.0

T70(V)	75	21.6+-0.4	48+-2	39+-1	Saturn	33.6 - 34.6
T70(V)	86	20.7+-0.5	46+-1	31+-1	Saturn	26.2 - 29.0

FOREST	115	16.0+-0.4	39+-3	24+-2	Saturn	18.6 - 25.6	an average of Beam 1H and 1V

The Efficiencies of the 45-m Radiotelescope during 2014-2015