Measured in November 2004 and December 2005
In December. 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.
Following values are measured in November 2004:
| Reciver |
Frequency [GHz] |
HPBW [arcsec] |
Main Beam Effic [%] |
Aperture Effic [%] |
Calib. source |
EL | comments |
| S80 | 110 | 15.0+-0.2 | 38+-3 | 30+-3 | Saturn | 55 - 66 | |
| 3C273 | 20 - 30 | ||||||
| 115 | 14.6+-0.2 | 30+-2 | 23+-2 | Saturn | 33 - 50 | ||
| 3C279 | 34 - 37 | ||||||
| S100 | 110 | 15.0+-0.2 | 45+-3 | 35+-3 | Saturn | 55 - 66 | |
| 3C273 | 20 - 30 | ||||||
| 115 | 14.6+-0.1 | 39+-3 | 29+-2 | Saturn | 30 - 50 | ||
| 3C279 | 26 - 39 | ||||||
Refer to Antenna Efficiency(2001-2002) for the values in all frequency bands.
Scroll back to Page TopMeasured in November 2003
We measured the beam size and the efficiencies only at 115GHz using S100. The measured values were in good agreement with the values measured in 2001. From this result, it is also thought that the beam size and the efficiencies are the same as those of the last year in lower frequency bands.
| Reciver |
Frequency [GHz] |
HPBW [arcsec] |
Main Beam Effic [%] |
Aperture Effic [%] |
Calib. source |
EL | comments |
| S100 | 115 | 14.7+-0.3 | 38+-3 | 28+-3 | Saturn | 72 | |
| 3C279 | 35 - 36 | ||||||
Refer to Antenna Efficiency(2001-2002) for the values in all frequency bands.
Scroll back to Page TopMeasured in November 2002
We measured the beam size and the efficiencies only at 115GHz using S100. The measured values were in good agreement with the values measured in 2001. From this result, it is also thought that the beam size and the efficiencies are the same as those of the last year in lower frequency bands.
| Reciver |
Frequency [GHz] |
HPBW [arcsec] |
Main Beam Effic [%] |
Aperture Effic [%] |
Calib. source |
EL | comments |
| S100 | 115 | 14.8+-0.1 | 40+-3 | 29+-2 | Saturn | 62 - 67 | |
| 3C273 | 38 - 54 | ||||||
Refer to Antenna Efficiency(2001-2002) for the values in all frequency bands.
Scroll back to Page TopMeasured between October and November 2001
*Based on the measurements in November 2002 only at high frequency (115 GHz), the following measured values were judged to be effective till June 2003.
| Reciver |
Frequency [GHz] |
HPBW [arcsec] |
Main Beam Effic [%] |
Aperture Effic [%] |
Calib. source |
EL | comments |
| H22(ch1) | 23 | 73.2+-0.2 | 84+-5 | 63+-4 | NGC7027 | 62 - 55 | |
| H22(ch2) | 23 | 72.4+-0.1 | 81+-4 | 62+-3 | NGC7027 | 62 - 55 | |
| H30 | 32 | 51.6+-0.1 | 79+-3 | 61+-1 | Saturn | 64 - 68 | |
| 3C454.3 | 70 | ||||||
| H40 | -- | --- | --- | --- | --- | --- | |
| S40 | 43 | 38.4+-0.1 | 77+-3 | 60+-3 | Saturn | 60 - 64 | * |
| 3C454.3 | 42 - 37 | ||||||
| 49 | 35.0+-0.3 | 73+-3 | 53+-2 | Saturn | 72 - 68 | * | |
| 3C273 | 46 - 50 | ||||||
| S80 | 86 | 18.5+-0.1 | 49+-2 | 41+-2 | Saturn | 70 - 67 | |
| 3C273 | 43 - 48 | ||||||
| 100 | 16.1+-0.1 | 47+-4 | 39+-4 | Saturn | 45 - 50 | ||
| 3C279 | 31 - 34 | ||||||
| 115 | 14.8+-0.1 | 32+-3 | 23+-2 | Saturn | 70 - 72 | ||
| 3C279 | 30 - 36 | ||||||
| S100 | 86 | 18.2+-0.1 | 51+-2 | 44+-2 | Saturn | 70 - 67 | |
| 3C273 | 43 - 48 | ||||||
| 100 | 16.1+-0.1 | 52+-4 | 42+-4 | Saturn | 45 - 50 | ||
| 3C279 | 31 - 34 | ||||||
| 115 | 14.8+-0.1 | 40+-3 | 29+-3 | Saturn | 70 - 72 | ||
| 3C279 | 30 - 36 | ||||||
| *): The beam sizes of the S40 receiver at 43 and 49 GHz are elongated for about 3.5 and 5.1 arcsec, respectively, in elevation. The beam size in the table is the average of the values in azimuth and elevation scans. | |||||||
The error of the efficiencies is mainly due to uncertainty of brightness temperature of the planet or flux density of NGC 7027. The error of the efficiencies and beam sizes corresponds to one sigma.
Appendix
