Index of /arm-iop-file/2022/guc/sailcorsipp/kalesse-los-wrad

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Leipzig University W-Band Cloud Radar, Gothic (Colorado), SAIL Campaign Second Winter (15.11.2022 - 05.06.2023)

Overview:

The instrument is a polarimetric W-Band simultaneous transmission simultaneous reception (STSR) Doppler Cloud Radar manufactured by Radiometer Physics GmbH (RPG, instrument type RPG-FMCW-94-DP). It was deployed about 500m away from the ARM M1 facility in Gothic (CO) near the Ore House between Nov 15, 2022 and Jun 5, 2023 at an altitude of 2913 m. The Doppler cloud radar was mounted on a prototype of a cold temperature scanner manufactured by RPG. The dataset contains common radar variables like equivalent radar reflectivity factor, mean Doppler velocity, Doppler spectrum width as well as common polarimetric radar variables like differential phase shift (PhiDP), specific differential phase shift (KDP), correlation coefficient (RHV) and differential reflectivity (ZDR). Between Nov 15, 2022, and Feb 7, 2023 the radar was operated at 40° constant elevation and 151° azimuth (towards the KAZR at the AMF1). Between Feb 7 and Mar 15, 2023 the following scan cycle was repeated in 15min intervals: zenith pointing measurements, RHI scans from 0° to 90° and 90° to 0° elevation at 151° azimuth, constant elevation measurements at 40° elevation and 151° azimuth and PPI scans at 85° elevation for wind retrievals (one PPI per hour). Between Mar 15 18:18 UTC and Apr 8, 2023 11:04 UTC, the scanner was stuck at 72° elevation, which resulted in corrupted files for this period. For that period, the files containing data are uploaded but should be treated with care. Between Apr 8 and Apr 14, 2023 the scanning pattern described above was performed again. Afterwards, except for May 17 and May 18, 2023 where scanning patterns as described above were performed, measurements continued at 40° elevation and 151° azimuth until May 22, 2023 09:00 UTC. The scanning pattern was then started again, but without hourly PPI measurements until May 31, 2023. Between May 31 and Jun 5, 2023 solely zenith-pointing observations were performed. The data provided here are the RPG Level 1 (L1) files, Doppler spectra Level 0 (L0) files are available upon request. 

Metadata Creator:
Name: Anton Kötsche
Email: ak52faca@studserv.uni-leipzig.de Phone: 017641411031
Street: City:
State: Postal:
Contact Info:
Name: Heike Kalesse-Los
Email: heike.kalesse@uni-leipzig.de Phone: +49 314 97 36650
Street: City:
State: Postal:
Investigator(s): Heike Kalesse-Los 0000-0001-6699-7040
Maximilian Maahn 0000-0002-2580-9100
Anton Kötsche
Veronika Ettrichrätz 0000-0002-0071-5415
Isabelle Steinke
Related Publications/References:
doi: 10.1109/TGRS.2023.3320287
Data Citation:https://doi.org/10.5439/2229846
Data Format:netcdf
File Naming Convention:(sss)(inst)(qqq)(Fn).(dl).YYYMMDD.hhmmss.nc eg. gucwcloudradarcelM1.c0.20230202.020009.nc Following arm file format. qqq depicts if measurements are constant elevation (CEL), vertical (ZEN), range-height-indicator (RHI) or plane-position-indicator(PPI).
Abstract:

The instrument is a polarimetric W-Band simultaneous transmission simultaneous reception (STSR) Doppler Cloud Radar manufactured by Radiometer Physics GmbH (RPG, instrument type RPG-FMCW-94-DP). It was deployed about 500m away from the ARM M1 facility in Gothic (CO) near the Ore House between Nov 15, 2022 and Jun 5, 2023 at an altitude of 2913 m. The Doppler cloud radar was mounted on a prototype of a cold temperature scanner manufactured by RPG. The dataset contains common radar variables like equivalent radar reflectivity factor, mean Doppler velocity, Doppler spectrum width as well as common polarimetric radar variables like differential phase shift (PhiDP), specific differential phase shift (KDP), correlation coefficient (RHV) and differential reflectivity (ZDR). Between Nov 15, 2022, and Feb 7, 2023 the radar was operated at 40° constant elevation and 151° azimuth (towards the KAZR at the AMF1). Between Feb 7 and Mar 15, 2023 the following scan cycle was repeated in 15min intervals: zenith pointing measurements, RHI scans from 0° to 90° and 90° to 0° elevation at 151° azimuth, constant elevation measurements at 40° elevation and 151° azimuth and PPI scans at 85° elevation for wind retrievals (one PPI per hour). Between Mar 15 18:18 UTC and Apr 8, 2023 11:04 UTC, the scanner was stuck at 72° elevation, which resulted in corrupted files for this period. For that period, the files containing data are uploaded but should be treated with care. Between Apr 8 and Apr 14, 2023 the scanning pattern described above was performed again. Afterwards, except for May 17 and May 18, 2023 where scanning patterns as described above were performed, measurements continued at 40° elevation and 151° azimuth until May 22, 2023 09:00 UTC. The scanning pattern was then started again, but without hourly PPI measurements until May 31, 2023. Between May 31 and Jun 5, 2023 solely zenith-pointing observations were performed. The data provided here are the RPG Level 1 (L1) files, Doppler spectra Level 0 (L0) files are available upon request. 
Purpose:

Data were collected to help improve the understanding of precipitation formation in orographically influenced terrain. 
Data Usage:
Data Credit:DFG (German Research Foundation) ,SPP-Prom (https://www2.meteo.uni-bonn.de/spp2115/doku.php?id=home)
Arm Sites: guc
Content Time Range: Begin: 2022-11-15 End: 2023-06-05
Data Type:Characterization of orography-influenced riming
Scientific Measurements(s):
Measurement nameVariables
Radar reflectivitydifferential_reflectivity
specific_differential_phase
differential_phase
uncorrected_copol_correlation_coeff
MeanDopplerVelocity
spectrum_skewness
doppler_spectrum_width
spectrum_kurtosis
Stratum Keyword(s):
Troposphere
Data Quality:
Attribute Accuracy: No formal uncertainty assessments were conducted and no estimates of uncertainty are reported.
Positional Accuracy: No formal positional accuracy tests were conducted
Consistency and Completeness Report: The chirp table was extended by a fourth chirp on Apr 17, 2023. The radar was impacted by power outages in the town of Gothic (CO). During that time, data is missing. Between Mar 15 18:18UTC and Apr 8, 2023 11:04UTC, the scanner was stuck, which resulted in corrupted files for this period. The corrupted data was removed. The only remaining files are constant elevation measurements at 77.72°. The rest of the data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Use Restrictions: No use constraints are associated with this data.
Distribution Info:
Organization Name: ARM Archive User Services
Email: armarchive[at]ornl.gov Phone: 1-888-ARM-DATA
Street: Oak Ridge National Laboratory City: Oak Ridge
State: Tennessee Postal: 37831-6290