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--- information_for_astronomers:rx:s14mm [2015/06/25 14:33]
ubach [Calibration Information]
+++ information_for_astronomers:rx:s14mm [2020/01/27 10:48] (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 receiver replaced the old 1.3cm secondary focus system. However, some modes, especially
+for broad-band observations are still under commissioning and are not yet available!
 This is a two horn system for continuum, spectroscopy and VLBI observations. The system is currently tested and all values are preliminary. \\
+**Note, that for technical reasons, no spectroscopic frequency-switch observations are possible!**
 ==== 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 | 17 | 47 | 1.09 | 43 | 38 | 1.56 | 67 | 40 | Jan 2020 |
-| 21.0 | 1 | LCP | 37 | 51 | 1.07 | 48 | 38 | 1.74 | 61 | 39.5 | Jan 2014 |
+| 21.15 | 1/2 | LCP/RCP | 14 | 67 | 1.05 | 64 | 37 | 1.74 | 61 | 37 | Jan 2020 |
-| 22.35 | 1 | LCP | 9.1 | 70 | 1.03 | 68 | 36 | 1.6 | 64 | 39.1 | Jun 2015* |
+| 22.35 | 1 | LCP | 9.1 | 70 | 1.03 | 68 | 36 | 1.6 | 64 | 39.1 | Jun 2015 |
-| 22.35 | 1 | RCP | 9.6 | 71 | 1.06 | 67 | 37 | 1.6 | 67 | 39.3 | Jun 2015* |
+| 22.35 | 1 | RCP | 9.6 | 71 | 1.06 | 67 | 37 | 1.6 | 67 | 39.3 | Jun 2015 |
-| 23.0 | 1 | LCP | 9.5 | 58 | 1.12 | 52 | 39 | 1.41 | 79 | 37.6 | Jan 2014 |
+| 22.85 | 1/2 | LCP/RCP | 9.2 | 74 | 1.03 | 72 | 36 | 1.41 | 79 | 36 | Jan 2020 |
-| 25.0 | 1 | LCP | 8.0 | 59 | 1.12 | 53 | 39 | 1.57 | 71 | 35.6 | Jan 2014 |
+| 24.75 | 1/2 | LCP/RCP | 8.0 | 72 | 1.01 | 71 | 36 | 1.57 | 71 | 34 | Jan 2020 |
 ^ 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 = 0.955 |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% (should be summer)
 ==== Version description for OBSINP ====
 ^ RX Name ^ Wavelength [cm] ^ Frequency (center) [GHz] ^ Nr. of Horns ^
-| **S13mm Double Beam RX ** | 1.3 | 18.0-26.0 (22.0) | 2 |
+| **S14mm 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 |||
+==== Receiver Bands ====
+The receiver delivers the data 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|
 ==== Channel assignment in the MBFITS data files ====
@@ Line 106: / Line 116: @@
 ==== 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 141: @@
 == 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 149: @@
 == 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 |}}

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