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--- information_for_astronomers:rx:s14mm [2015/06/25 14:33]
ubach [Calibration Information]
+++ information_for_astronomers:rx:s14mm [2024/07/10 16:23] (current)
akraus
@@ Line 1: / Line 1: @@
 ====== 1.3cm double beam secondary focus receiver (18000-26000 MHz) ======
-** The receiver is in commissioning. It is not yet available! **
+This is a two horn system especially for continuum, spectroscopy and VLBI observations.
-This is a two horn system for continuum, spectroscopy and VLBI observations. The system is currently tested and all values are preliminary. \\
+==== Overview ====
+^ RX Name ^ [[information_for_astronomers:rx:bands|Band]] ^ Frequency range [GHz] ^ Polarisation^Nr. of Horns ^Horn position relativ to center of focus cabin^
+| **S14mm** | K | 18.0-26.0 | dual-circular| 2 | Horn 1: Az: -95.6 arcsec, Elv: 734.2 arcsec,\\ Horn 2: Az: 95.6 arcsec, Elv: 734.2 arcsec|
 ==== Calibration Information ====
 ^ 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 ^
-| 19.0 | 1 | LCP | 49 | 39 | 1.05 | 37 | 37 | 1.56 | 67 | 41.9 | Jan 2014 |
+| 19.25 | 1/2 | LCP/RCP | 13.1 | 47 | 1.09 | 43 | 38 | 1.56 | 67 | 40.4 | Jul 2024 |
-| 21.0 | 1 | LCP | 37 | 51 | 1.07 | 48 | 38 | 1.74 | 61 | 39.5 | Jan 2014 |
+| 21.15 | 1/2 | LCP/RCP | 9.2 | 67 | 1.05 | 64 | 37 | 1.74 | 61 | 37.8 | Jul 2024 |
-| 22.35 | 1 | LCP | 9.1 | 70 | 1.03 | 68 | 36 | 1.6 | 64 | 39.1 | Jun 2015* |
+| 22.85 | 1/2 | LCP/RCP | 9.0 | 74 | 1.03 | 72 | 36 | 1.41 | 79 | 36.8 | Jul 2024 |
-| 22.35 | 1 | RCP | 9.6 | 71 | 1.06 | 67 | 37 | 1.6 | 67 | 39.3 | Jun 2015* |
+| 24.75 | 1/2 | LCP/RCP | 8.0 | 72 | 1.01 | 71 | 36 | 1.57 | 71 | 34.5 | Jul 2024 |
-| 23.0 | 1 | LCP | 9.5 | 58 | 1.12 | 52 | 39 | 1.41 | 79 | 37.6 | Jan 2014 |
+| 22.25 | 1/2 | LCP/RCP | 8.4 | 72 | 1.05 | 71 | 36 | 1.57 | 71 | 36.8 | Jul 2024 |
-| 25.0 | 1 | LCP | 8.0 | 59 | 1.12 | 53 | 39 | 1.57 | 71 | 35.6 | Jan 2014 |
+| 23.77 | 1/2 | LCP/RCP | 8.0 | 72 | 1.03 | 71 | 36 | 1.57 | 71 | 35.2 | Jul 2024 |
 ^ normalized Gain curve (G = A0 + A1·Elv + A2·Elv2)^^^ Observed in ^ confirmed ^
-|A0 = 0.954 |A1 = 3.19E-3 |A2 = -5.42E-5 | Jun 2015 | Jun 2015 |
+|A0 = 0.981 |A1 = 1.08E-3 |A2 = -1.52E-5 | Jul 2024 | Jul 2024 |
-|A0 = 0.955 |A1 = 3.1E-3 |A2 = -5.3E-5 | Jan 2014 | Jan 2014 |
 **Comments:**
    * Note that the system temperature at this frequency depends strongly on weather conditions!
-   * Zenith tau values can range from 0.05 to 0.2.
+   * Zenith tau values can range from 0.05 to more than 0.2.
-   * (*) tau=0.12, Temp. from 10-15C, Hum. 98% to 70%
+The receiver delivers the data by default in four 2.5GHz-wide IF-subbands:
+^Band^Frequency Range^
+|4|18.0-20.5 GHz|
+|3|19.9-22.4 GHz|
+|2|21.6-24.1 GHz|
+|1|23.5-26.0 GHz|
+Additionally, there are several receiver versions (see below) which
+allow to observe two 300 MHz-wide bands, e.g. for 22.25 GHz (i.e., the
+water line) and 23.77 GHz (NH3 (1,1)-(3,3)).
+==== Available receiver versions (for OBSINP) ====
+^Version^Description^Details^
+|dualpix_dualpol_cont_OPTOCBE|standard continuum backend with 4 basebands| 4x 2.5 GHz|
+|dualpix_dualpol_hires_h2o_nh3 |spectroscopic mode with two basebands, centered at 22.25 and 23.77 GHz | bandwidth is 300 MHz per baseband|
+**Below here: Information is currently updated.**
-==== Version description for OBSINP ====
+==== Receiver Bands ====
-^ RX Name ^ Wavelength [cm] ^ Frequency (center) [GHz] ^ Nr. of Horns ^
-| **S13mm Double Beam RX ** | 1.3 | 18.0-26.0 (22.0) | 2 |
-| **Version:** |   **Comment**   |||
-|1. Continuum (BW: 2 GHz) | Broad Band Continuum |||
-| **Horn offsets** [arcsec]| Horn 1:-95.6,734.2; 2: 95.6,734.2 |||
@@ Line 106: / Line 122: @@
 ==== Tcal measurements ====
+=== February 2019 ===
+== Tcal and Tsys ==
+{{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_tcal_from_specpointing_using_tau_spec.png?365 |}}
+{{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_tsys0_from_specpointing_using_tau_spec.png?365 |}}
+== Opacity and Tebb (WVR+AATM) ==
+{{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_tau_from_specpointing_using_tau_spec.png?365 |}}
+{{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_tebb_from_specpointing_using_tau_spec.png?365 |}}
+== T0 ==
+{{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_t0_from_specpointing_using_tau_spec.png?365 |}}
 === April 2014 ===
 Note, that in April the Tcal was changed in the receiver. Gaps in the curves are entirely due to measurement uncertainties. T0 and Tsys were deduced from spectroscopic skydip measurements and are subject to fitting errors caused by the low signal-to-noise ratio in the spectral bins.
@@ Line 120: / Line 147: @@
 == Tcal and Tsys ==
 {{:information_for_astronomers:rx:s14mm_jan14_ngc7027b_tcal_from_specpointing_using_tau_spec.png?365 |}}
 {{:information_for_astronomers:rx:s14mm_jan14_ngc7027b_tsys0_from_specpointing_using_tau_spec.png?365 |}}
@@ Line 127: / Line 155: @@
 == Antenna model ==
-{{:information_for_astronomers:rx:s14mm_jan14_ngc7027b_taper_from_specpointing.png?365 |}}
+{{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_taper_from_specpointing.png?365 |}}
-{{:information_for_astronomers:rx:s14mm_jan14_ngc7027b_hpbw_from_specpointing.png?365 |}}
+{{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_hpbw_from_specpointing.png?365 |}}
+{{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_gamma_from_specpointing.png?365 |}}
+{{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_gammamb_from_specpointing.png?365 |}}
+{{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_eta_from_specpointing.png?365 |}}
+{{:information_for_astronomers:rx:EFFBG_S14mm_Kband_2019Feb23_NGC7027_aatm_etamb_from_specpointing.png?365 |}}
-{{:information_for_astronomers:rx:s14mm_jan14_ngc7027b_gamma_from_specpointing.png?365 |}}
-{{:information_for_astronomers:rx:s14mm_jan14_ngc7027b_gammamb_from_specpointing.png?365 |}}
-{{:information_for_astronomers:rx:s14mm_jan14_ngc7027b_eta_from_specpointing.png?365 |}}
-{{:information_for_astronomers:rx:s14mm_jan14_ngc7027b_etamb_from_specpointing.png?365 |}}

Effelsberg 100m Teleskop

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