Differences

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--- nyrad35 [2026/06/01 08:19] – kerstin
+++ nyrad35 [2026/06/01 09:41] (current) – kerstin
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-====== NYRAD35 35 GHz cloud rada ======
+====== NYRAD35 35 GHz cloud radar ======
 //Mentor: [[https://geomet.uni-koeln.de/institut/beschaeftigte/mech|M. Mech]], Data: [[https://geomet.uni-koeln.de/institut/beschaeftigte/ebell|K. Ebell]] //
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 ===== Principle =====
-NYRAD35 is a dual-polarization simultaneous transmission and simultaneous reception (STSR; also referred to as hybrid-mode, or STAR, simultaneous transmission and reception) radar, with elevation-scanning capabilities. The scanner can perform full 180° scans in elevation and is operated at a constant azimuth of approximately 27°, i.e., along the north-north-east to south-south-west direction. STSR radars receive at horizontal and vertical polarization but transmit a signal that is linearly polarized along the 45° direction between vertical and horizontal directions. This allows both for linear depolarization ratio (LDR) observations in zenith and typical dual-polarization variable observations at low elevations, such as differential reflectivity (ZDR) or specific differential phase (KDP). Matching Ka- and W-band observations in zenith allows for the calculation of the DWR, in order to obtain information on the characteristics size of the ice particle population.
+The NYRAD35 is a dual-polarization simultaneous transmission and simultaneous reception (STSR; also referred to as hybrid-mode, or STAR, simultaneous transmission and reception) radar, with elevation-scanning capabilities. The scanner can perform full 180° scans in elevation and is operated at a constant azimuth of approximately 27°, i.e., along the north-north-east to south-south-west direction. STSR radars receive at both horizontal and vertical polarization but transmit a linearly polarized signal at 45° (between the vertical and horizontal polarization planes). This allows both for linear depolarization ratio (LDR) observations in zenith and typical dual-polarization variable observations at low elevations, such as differential reflectivity (ZDR) or specific differential phase (KDP). Matching Ka- and W-band observations at zenith allows calculation of the DWR, providing information on the characteristic size of the ice particle population.
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 | Antenna gain | 48.0 dB |  |
 | Beam Width | 0.8° FWHM |  |
-| Polarisation | V |  |
+| Polarisation | Dual-polarization (STSR) | receives V/H polarised radiation and emits at 45° (between vertical and horizontal directions) linearly polarized radiation (="simultaneous transmission simultaneous reception" (STSR)) |
 | Dynamic Range | -43 dBZe to +30 dBZ | valid for 5 km distance, 30 m resolution, and 10 s sampling time  |
 | Ranging | 50 m to 12 km | maximum 18 km |
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 | Passive Channels | 31.4 GHz | for integral liquid water (LWP) detection (200 MHz BW) |
 | Passive Channel Noise Figure | 3.7 dB |  |
-| Data Products | Raw spectra, Spectral polarimetric parameters,Reflectivity, Mean Doppler velocity, Doppler width, Skewness, Kurtosis, Differential reflectivity, Differential phase shift, Correlation coefficient |  |
+| Data Products | Raw spectra, Spectral polarimetric parameters, Reflectivity, Mean Doppler velocity, Doppler width, Skewness, Kurtosis, Differential reflectivity, Differential phase shift, Correlation coefficient |  |
-| Data Formats | proprietary binary, netCDF (conformity with CF convention), ASCII (only moment profiles) |  |
+| Data Formats | proprietary binary, netCDF (conformity with CF convention) |  |
-| Rain / Snow Mitigation System | Super blower for rec. / transm. radome (2000 m³/h each) |Optional heater modules (2 kW to 4 kW) |
+| Rain/Snow/Dew Mitigation System | Strong dew blower (4000 m3/h ), radomes with hydrophobic coating | |
-| Weight | Radar main body: 100 kg, Table: 130 kg, Air conductors: 25 kg |  |
+| Weight | Radar main body: 160 kg, Table: 35 kg, Blower: 109 kg |  |
-| Power Consumption | 220 V AC, 50-60 Hz, Radar: 400 W, Blowers: 1000 W |  |
+| Maximum Power Consumption | Radar: max. 1100 W, Blower: 850 W, Scanner: 800 W, 230 V AC, 50-60 Hz |  |
+| Elevation Scanning | zenith mode, 30° low-elevation mode | azimuth direction fixed to 27° (along north-north-east to south-south-west direction); elevation angle adjustable; alternating continuous zenith/low-elevation measurements with 1°/sec elevation scan  in-between |
 | Manufacturer | [[http://www.radiometer-physics.de/|RPG]] |