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--- information_for_astronomers:rx:s20mmnew [2020/01/28 21:11]
akraus
+++ information_for_astronomers:rx:s20mmnew [2024/11/29 12:24] (current)
akraus
@@ Line 1: / Line 1: @@
 ====== 2cm double beam secondary focus receiver (12000-18000 MHz) ======
-This receiver replaced the old 2cm secondary focus system. It is a two horn system for continuum, spectroscopy and VLBI observations. The system is currently tested and all values are preliminary. \\
+This receiver is a two horn system for continuum, spectroscopy and VLBI observations. \\
-**Note, that for technical reasons, no spectroscopic frequency-switch observations are possible!**
+==== Overview ====
+^ RX Name ^ [[information_for_astronomers:rx:bands|Band]] ^ Frequency range [GHz] ^ Polarisation^Nr. of Horns ^Horn position relativ to center of focus cabin^
+| **S20mm** | K | 12.0-18.0 | dual-circular| 2 | Horn 1: Az: -525 arcsec, Elv: 63 arcsec,\\ Horn 2: Az: -762 arcsec, Elv: 63 arcsec|
 ==== Calibration Information ====
 ^ Frequency [GHz] ^ Feed ^ Polarisation ^ Tcal [K] ^ Tsys [K] ^ Sensitivity [K/Jy] ^ SEFD [Jy] ^ Aperture Eff. [%] ^ TMB/S [K/Jy] ^ Main Beam Eff. [%] ^ FWHM [arcsec] ^ Last update ^
-| 13.0 | 1 | LCP | 4.25 | 54.52 | 1.42 | 77.42 | 49.8 | 2.13 | 66.4 | 58.3 | Nov 2019 |
+| 14.25 | 1 | LCP | 2.1 | 34 | 1.36 | 25 | 48 | 2.18 | 62 | 52.5 | Jun 2024 |
-| 13.0 | 1 | RCP | 4.51 | 55.18 | 1.42 | 78.36 | 49.9 | 2.14 | 66.4 | 58.3 | Nov 2019 |
+| 14.25 | 1 | RCP | 2.1 | 34 | 1.36 | 25 | 48 | 2.18 | 62 | 52.5 | Jun 2024 |
-| 15.0 | 1 | LCP | 2.49 | 59.00 | 1.31 | 77.29 | 45.9 | 1.97 | 66.2 | 52.7 | Nov 2019 |
+| 16.75 | 1 | LCP | 2.8 | 45 | 1.30 | 35 | 46 | 2.22 | 59 | 44.3 | Jun 2024 |
-| 15.0 | 1 | RCP | 2.43 | 61.42 | 1.30 | 79.85 | 45.6 | 1.96 | 66.2 | 52.5 | Nov 2019 |
+| 16.75 | 1 | RCP | 2.8 | 45 | 1.30 | 35 | 46 | 2.22 | 59 | 44.3 | Jun 2024 |
-| 17.0 | 1 | LCP | 4.07 | 64.06 | 1.19 | 76.23 | 41.7 | 1.80 | 65.7 | 48.4 | Nov 2019 |
-| 17.0 | 1 | RCP | 4.52 | 64.85 | 1.17 | 75.87 | 41.3 | 1.79 | 65.8 | 48.6 | Nov 2019 |
 ^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in ^ confirmed ^
-|A0 = 0.97099 |A1 = 1.8327E-3 |A2 = -2.8674E-5 | (from old S20mm) | ---  |
+|A0 = 0.9818 |A1 = 1.179E-3 |A2 = -1.906E-5 | Dec 2022 | ---  |
 **Comments:**
-   * Note that the system temperature at this frequency depends strongly on weather conditions!
+   * Note that the system temperature at this frequency depends on weather conditions!
-   * Zenith tau values can range from ??? to ???.
+   * For technical reasons, no spectroscopic frequency-switch observations are possible!
+   * Below 13 GHz, there is strong interference due to communication with satellites.
+==== Available receiver versions (for OBSINP) ====
+^Version^Description^Details^
+|continuum_5ghz|standard continuum backend with 2 basebands| 13.0-15.5 GHz & 15.5-18.0 GHz|
+|cont_spec_5ghz|includes the WFFTS with 2x2x64k channels | 13.0-15.5 GHz & 15.5-18.0 GHz|
+**Below here: Information is currently updated.**
 ==== Version description for OBSINP ====
@@ Line 28: / Line 43: @@
 | **Version:** |   **Comment**   |||
 |1. Continuum (BW: 2 GHz) | Broad Band Continuum |||
-| **Horn offsets** [arcsec]| Horn 1:TBD; 2:TBD |||
+| **Horn offsets** (Azi, Elv, from center of SFK)| Horn 1: -525" ; 63" -- Horn 2: -762" ; 63" |||
+|relative offset of horn 2 from 1 (Azi, Elv)| -237" ; 0"|||
@@ Line 96: / Line 112: @@
 ==== Tcal measurements ====
+=== Mar 2020 ===
+== Tcal and Tsys ==
+{{:information_for_astronomers:rx:effbg_s20mm_kuband_2020mar27_ngc7027_wrv_tcal_from_specpointing_using_tau_spec.png?365 |}}
+{{:information_for_astronomers:rx:effbg_s20mm_kuband_2020mar27_ngc7027_wrv_tsys0_from_specpointing_using_tau_spec.png?365 |}}
+== Opacity and Tebb (WVR+AATM) ==
+{{:information_for_astronomers:rx:effbg_s20mm_kuband_2020mar27_ngc7027_wrv_tau_from_specpointing_using_tau_spec.png?365 |}}
+{{:information_for_astronomers:rx:effbg_s20mm_kuband_2020mar27_ngc7027_wrv_tebb_from_specpointing_using_tau_spec.png?365 |}}
+== T0 ==
+{{:information_for_astronomers:rx:effbg_s20mm_kuband_2020mar27_ngc7027_wrv_t0_from_specpointing_using_tau_spec.png?365 |}}
+== Antenna model ==
+{{:information_for_astronomers:rx:effbg_s20mm_kuband_2020mar27_ngc7027_wrv_taper_from_specpointing.png?365 |}}
+{{:information_for_astronomers:rx:effbg_s20mm_kuband_2020mar27_ngc7027_wrv_hpbw_from_specpointing.png?365 |}}
+{{:information_for_astronomers:rx:effbg_s20mm_kuband_2020mar27_ngc7027_wrv_gamma_from_specpointing.png?365 |}}
+{{:information_for_astronomers:rx:effbg_s20mm_kuband_2020mar27_ngc7027_wrv_gammamb_from_specpointing.png?365 |}}
+{{:information_for_astronomers:rx:effbg_s20mm_kuband_2020mar27_ngc7027_wrv_eta_from_specpointing.png?365 |}}
+{{:information_for_astronomers:rx:effbg_s20mm_kuband_2020mar27_ngc7027_wrv_etamb_from_specpointing.png?365 |}}
 === Nov 2019 ===
 == Tcal and Tsys ==

Effelsberg 100m Teleskop

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