This is a 2-channel system used for spectroscopy. The 2.5cm part is realized by a new filter. The calibration parameters are still somewhat uncertain (about 10%). The lower part of the band at 12.1 GHz is affected by RFI from TV satellites which might also explain the higher Tsys.
Frequency [GHz] | Channel | Polarisation | Tcal [K] | Tsys [K] | Sensitivity [K/Jy] | SEFD [Jy] | Aperture Eff. [%] | TMB/S [K/Jy] | Main Beam Eff. [%] | FWHM [arcsec] | Last update |
---|---|---|---|---|---|---|---|---|---|---|---|
12.10 | A | LCP | 6.5 | 128 | 1.4 | 93 | 48 | 1.9 | 71 | 65.0 | Dec 2009 |
12.10 | A | RCP | 5.6 | 210 | 1.4 | 155 | 48 | 1.9 | 70 | 65.0 | Dec 2009 |
12.18 | A | LCP | 5.2 | 79 | 1.4 | 57 | 47 | 1.9 | 75 | 65.0 | Dec 2009 |
12.18 | A | RCP | 4.5 | 102 | 1.4 | 78 | 47 | 1.9 | 71 | 65.0 | Dec 2009 |
13.09 | A | LCP | 2.0 | 64 | 1.45 | 44 | 51 | 1.9 | 78 | 62.0 | Aug 2009 |
13.09 | B | RCP | 2.0 | 65 | 1.45 | 45 | 51 | 1.9 | 78 | 62.0 | Aug 2009 |
13.39 | A | LCP | 1.8 | 61 | 1.4 | 42 | 50 | 1.9 | 74 | 59.3 | Sep 2005 |
13.39 | B | RCP | 2.1 | 63 | 1.4 | 44 | 50 | 1.9 | 74 | 59.3 | Sep 2005 |
normalized Gain curve (G = A0 + A1·Elv + A2·Elv2) | Observed in | confirmed | ||
---|---|---|---|---|
A0 = 0.9644 | A1 = 2.1838E-03 | A2 = -3.3018E-05 | Dec 2009 |
Comments:
RX Name | Wavelength [cm] | Frequency (center) [GHz] | Nr. of Horns |
---|---|---|---|
P22mm 4-Box (12,1- 13,6 GHz) | 2.2-2.5 | 12.1-13.6 (13.1) | 1 |
Version: | Comment | ||
1. Cont./Line: 12,1-12,25 GHz (2,5 cm) (BW: 100 MHz) | Continuum and spectroscopy at 2.5cm | ||
2. Cont./Line: 12,9-13,6 GHz (2,2 cm) (BW: 100 MHz) | Continuum and spectroscopy at 2.2cm | ||
Horn offsets [arcsec] | -1155.5, 1066.7 |
Note that the narrow line and VLBA IF channels are usually only available when the specific line version of the receiver was selected. In addition for most receivers with narrow line channels the cables at the patch board need to be connected by the receiver group.
To select different channel numbers in OBSINP, the online plot, or the toolbox the numbers have to be specified like c(1)+c(2) to add channel 1 and 2. E.g. channel 1 and 2 contain the LCP and RCP broadband channels, then "OnlPlot pen='c(1)+c(2)'" or "toolbox use='c(1)+c(2)'" will select these channels. In OBSINP the pen can be directly specified in the receiver selection menu.
Abbreviations:
SB: narrow band channel (Schmalband-Kanal), 100 MHz band width
BB: digital broad band channel (Breitband-Kanal), band width varies for different receivers
VLBA: VLBA IF, 500 MHz band width
BW: band width
TP: total power
2.2cm/2.5cm PFK (Multi-RX-Box II) | |||
---|---|---|---|
Channel | IF | Pol. | Comment |
1 | SB | LCP | 2.2cm, TP A |
2 | SB | RCP | 2.2cm, TP B |
3 | SB | cross | 2.2cm, cos AB |
4 | SB | cross | 2.2cm, sin AB |
5 | SB | LCP | 2.5cm, TP A |
6 | SB | RCP | 2.5cm, TP B |
BW | nchan | nu | Df | Dv | dv |
---|---|---|---|---|---|
MHz | MHz | kHz | km/s | km/s | |
100 | 32768 | 12100 | 3.1 | 0.076 | 0.088 |
100 | 32768 | 12150 | 3.1 | 0.075 | 0.087 |
100 | 32768 | 12200 | 3.1 | 0.075 | 0.087 |
100 | 32768 | 12250 | 3.1 | 0.075 | 0.087 |
100 | 32768 | 12900 | 3.1 | 0.071 | 0.082 |
100 | 32768 | 13000 | 3.1 | 0.070 | 0.082 |
100 | 32768 | 13100 | 3.1 | 0.070 | 0.081 |
100 | 32768 | 13200 | 3.1 | 0.069 | 0.080 |
100 | 32768 | 13300 | 3.1 | 0.069 | 0.080 |
100 | 32768 | 13400 | 3.1 | 0.068 | 0.079 |
100 | 32768 | 13500 | 3.1 | 0.068 | 0.079 |
100 | 32768 | 13600 | 3.1 | 0.067 | 0.078 |
BW … band width
nchan … number of spectral channels
nu … center frequency
Df … Channel separation (in frequency)
Dv … Channel separation (in velocity)
dv … Velocity resolution (dv=1.16*Dv)
TODO