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information_for_astronomers:rx:s45mm
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Table of Contents
4.5cm broad band C/X secondary focus receiver (4000-9300 MHz)
This is a broad-band receiver with two orthogonal linear polarizations (at a 45°-angle with the horizon). The receiver delivers 4 basebands (each with two polarizations):
| Baseband | Center Frequency | Bandwidth | Comment |
|---|---|---|---|
| 1 | 5.250 GHz | 2500 MHz | beware of strong RFI at frequencies < 4.5 GHz! |
| 2 | 6.750 GHz | 2500 MHz | |
| 3 | 6.668 GHz | 200 MHz | for methanol observations |
| 4 | 4.829 GHz | 200 MHz | for formaldehyde observations |
Calibration Information
| Frequency [GHz] | Channel | Polarisation | Tcal [K] | Tsys [K] | Sensitivity [K/Jy] | SEFD [Jy] | Aperture Eff. [%] | TMB/S [K/Jy] | Main Beam Eff. [%] | HPBW [arcsec] | Last update |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 5.250 | 1+2 | lin | 3.1 | 35 | 1.60 | 22 | 56 | 2.2 | 63 | 140 | Oct 2019 |
| 6.750 | 1+2 | lin | 4.5 | 37 | 1.40 | 26 | 49 | 2.2 | 63 | 105 | Oct 2019 |
| 6.668 | 1+2 | lin | 3.6 | 34 | 1.39 | 24 | 49 | 2.2 | 63 | 109 | Oct 2019 |
| 4.829 | 1+2 | lin | 2.8 | 42 | 1.59 | 26 | 56 | 2.2 | 63 | 146 | Oct 2019 |
| normalized Gain curve (G = A0 + A1·Elv + A2·Elv2) | Observed in | confirmed | ||
|---|---|---|---|---|
| A0 = 0.9928 | A1 = 4.212E-4 | A2 = -6.158E-6 | Jun 2016 | Oct 2019 |
Comments:
- The gain curve was corrected for opacity (though it is small, < 0.02 throughout the band).
Version description for OBSINP
Channel assignment in the MBFITS data files
Tcal and Tsys measurements
information_for_astronomers/rx/s45mm.1570612764.txt.gz · Last modified: 2019/10/09 11:19 by akraus
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