The Efficiencies of the 45-m Radiotelescope in 2015-2016 Observing Season

(These values should be used also the 2016-2017 observing season)

Measured between March - May 2016


        
            
                Reciver

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

            
            
            
            
                FOREST(H)
                86
                17.9+-0.2
                56+-3
                50+-2
                Mars
                40.9 - 44.2
                
            
            
                110
                14.4+-0.3
                43+-2
                36+-2
                Mars
                40.3 - 43.6
                
            
            
                115
                14.1+-0.1
                45+-2
                37+-2
                Mars
                49.9 - 50.1
                
            
            
                

            

            
            
                FOREST(V)
                86
                17.9+-0.2
                55+-3
                49+-2
                Mars
                40.9 - 44.2
                
            
            
                110
                14.4+-0.4
                43+-2
                37+-2
                Mars
                40.3 - 43.6
                
            
            
                115
                14.2+-0.1
                45+-2
                36+-2
                Mars
                50.1 - 49.9
                
            
            
                

            

            
            
                TZ1(H)
                86
                18.2+-0.1
                54+-3
                47+-2
                Mars
                50.1 - 51.1
                
            
            
                110
                14.2+-0.1
                42+-2
                37+-2
                Mars
                50.0 - 53.7
                
            
            
                115
                13.5+-0.1
                41+-2
                36+-2
                Mars
                47.8 - 51.2
                
            
            
                

            

            
            
                TZ1(V)
                86
                18.2+-0.1
                53+-3
                46+-2
                Mars
                50.1 - 51.1
                
            
            
                110
                14.5+-0.1
                42+-2
                35+-2
                Mars
                50.0 - 53.7
                
            
            
                115
                13.6+-0.1
                43+-2
                37+-2
                Mars
                47.8 - 51.2
                
            
            
                

            

            
            
                TZ2(H)
                86
                18.8+-0.2
                54+-3
                44+-2
                Mars
                52.8 - 54.7
                
            
            
                110
                14.7+-0.2
                46+-2
                38+-2
                Mars
                38.0 - 42.2
                
            
            
                115
                13.9+-0.1
                37+-2
                31+-4
                Mars
                26.8 - 29.2
                
            
            
                

            

            
            
                TZ2(V)
                86
                18.8+-0.3
                56+-3
                45+-2
                Mars
                52.8 - 54.7
                
            
            
                110
                14.9+-0.1
                47+-2
                38+-2
                Mars
                38.0 - 42.2
                
            
            
                115
                13.9+-0.1
                37+-2
                31+-4
                Mars
                26.8 - 29.2
                
            
            
                

            

            
            
                T70(H)
                75
                20.3+-0.3
                54+-3
                49+-2
                Mars
                45.6 - 48.8
                
            
            
                86
                19.1+-0.3
                54+-3
                42+-2
                Mars
                29.8 - 34.4
                
            
            
                

            

            
            
                T70(V)
                75
                20.1+-0.5
                56+-3
                52+-3
                Mars
                45.6 - 48.8
                
            
            
                86
                19.0+-0.2
                55+-3
                44+-2
                Mars
                29.8 - 34.4
                
            
            
                

            

            
            
                Z45(H)
                43
                37.3+-0.2
                72+-3
                59+-3
                Mars
                32.5 - 32.4
                
            

            
                

            

            
            
                Z45(V)
                43
                36.8+-0.2
                70+-3
                59+-3
                Mars
                32.5 - 32.5
                
            

            
                

            

            
            
                H40
                43
                38.7+-0.1
                69+-3
                53+-3
                Mars
                26.6 - 30.1
                
            

            
                

            

            
            
                H22(ch1)
                23
                74.4+-0.3
                83+-4
                61+-3
                Jupiter
                47.0 - 42.4
                
            

            
                

            

            
            
                H22(ch2)
                23
                73.9+-0.3
                84+-4
                61+-3
                Jupiter
                47.0 - 42.4

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

Brightness Temperatures (Tb) of the Source (We used temperatures compiled by Shibata 1990)
Mars
- Mars 210 K (assumed based on compiled data by Shibata, 5 % error is also assumed)
- The brightness temperature of Mars is known to change depending on the distance to the Sun (R). According to Ulich (1981), the approximate formula to obtain effective Tb is Tb(effective) = Tb x (1.524 AU / R)1/2. The value of R is taken from Japanese Ephemeris.
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(2015)
- THE ASTRONOMICAL ALMANAC(2016)
- Ulich, Astron. J. 86, 1619 (1981)

2016-06-12

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

FOREST(H)	86	17.9+-0.2	56+-3	50+-2	Mars	40.9 - 44.2
	110	14.4+-0.3	43+-2	36+-2	Mars	40.3 - 43.6
	115	14.1+-0.1	45+-2	37+-2	Mars	49.9 - 50.1

FOREST(V)	86	17.9+-0.2	55+-3	49+-2	Mars	40.9 - 44.2
	110	14.4+-0.4	43+-2	37+-2	Mars	40.3 - 43.6
	115	14.2+-0.1	45+-2	36+-2	Mars	50.1 - 49.9

TZ1(H)	86	18.2+-0.1	54+-3	47+-2	Mars	50.1 - 51.1
	110	14.2+-0.1	42+-2	37+-2	Mars	50.0 - 53.7
	115	13.5+-0.1	41+-2	36+-2	Mars	47.8 - 51.2

TZ1(V)	86	18.2+-0.1	53+-3	46+-2	Mars	50.1 - 51.1
	110	14.5+-0.1	42+-2	35+-2	Mars	50.0 - 53.7
	115	13.6+-0.1	43+-2	37+-2	Mars	47.8 - 51.2

TZ2(H)	86	18.8+-0.2	54+-3	44+-2	Mars	52.8 - 54.7
	110	14.7+-0.2	46+-2	38+-2	Mars	38.0 - 42.2
	115	13.9+-0.1	37+-2	31+-4	Mars	26.8 - 29.2

TZ2(V)	86	18.8+-0.3	56+-3	45+-2	Mars	52.8 - 54.7
	110	14.9+-0.1	47+-2	38+-2	Mars	38.0 - 42.2
	115	13.9+-0.1	37+-2	31+-4	Mars	26.8 - 29.2

T70(H)	75	20.3+-0.3	54+-3	49+-2	Mars	45.6 - 48.8
T70(H)	86	19.1+-0.3	54+-3	42+-2	Mars	29.8 - 34.4

T70(V)	75	20.1+-0.5	56+-3	52+-3	Mars	45.6 - 48.8
T70(V)	86	19.0+-0.2	55+-3	44+-2	Mars	29.8 - 34.4

Z45(H)	43	37.3+-0.2	72+-3	59+-3	Mars	32.5 - 32.4

Z45(V)	43	36.8+-0.2	70+-3	59+-3	Mars	32.5 - 32.5

H40	43	38.7+-0.1	69+-3	53+-3	Mars	26.6 - 30.1

H22(ch1)	23	74.4+-0.3	83+-4	61+-3	Jupiter	47.0 - 42.4

H22(ch2)	23	73.9+-0.3	84+-4	61+-3	Jupiter	47.0 - 42.4

The Efficiencies of the 45-m Radiotelescope during 2015-2016