Other language confidence: 0.7801288252324061
The data set contains daily files of microwave radiation measurements by the MiRAC-P (also called LHUMPRO-243-340) microwave radiometer (see Mech et al., 2019, doi:10.5194/amt-12-5019-2019) during a surface-observation mode onboard the RV Polarstern during cruise PS131 (ATWAICE expedition, see Kanzow, 2023, doi:10.57738/BzPM_0770_2023). The instrument was installed at about 22 m height at the top deck on starboard site. Via a mirror construction the radiometers were observing the surface, i.e, ocean and sea ice, at a viewing angle of about 53° off nadir for 15 min each hour. The actual viewing angle could vary by a few degrees because of ship motion. Also, on six occasions the mirror position was changed to observe at different viewing angles. The data covers the range July 7, 2022 to August 12, 2022. The radiation measurements are given as brightness temperatures in six double side band averaged G band (183.31 +/- 0.6 to 183.31 +/- 7.5 GHz), predominantly-vertical polarization at 53° zenith angle, and one higher frequency (243 GHz) channel, predominantly-horizontal polarization at at 53° zenith angle. The 340 GHz channel was malfunctioning. During the cruise the instrument was calibrated with liquid nitrogen on July 7 and July 30. The data is processed with the mwr_pro software (doi:10.5281/zenodo.7973552). Quality flags characterizing the instrument and retrieval performance are set and described. The brightness temperatures are provided for all available times so that it is up to the user to decide whether or not to use the values if quality flags are set. The sanity_receiver_band1, sanity_receiver_band2 and rain_flag are rather strict and data quality might still be satisfying despite the flag being set. However, we recommend to exclude data where visual_inspection_filter_band_1, visual_inspection_filter_band_2 or visual_inspection_filter_band_3 are set. In addition the following times should be dealt with with caution as the radom of the radiometer was likely wet during these periods: 2022-07-19T22:52 - 2022-07-19T23:59, 2022-07-23T06:12 - 2022-07-23T07:15, 2022-07-26T22:30 - 2022-07-26T23:59, 2022-07-27T06:00 - 2022-07-27T12:00, 2022-07-27T20:00 - 2022-07-27T23:59, 2022-07-28T00:00 - 2022-07-28T00:30, 2022-07-28T12:00 - 2022-07-28T15:00 .
The data set contains daily files of microwave radiation measurements by the HATPRO microwave radiometer (see Rose et al., 2015, doi:doi:10.1016/j.atmosres.2004.12.005) during a surface-observation mode onboard the RV POLARSTERN during cruise PS131 (ATWAICE expedition, see Kanzow, 2023, doi:10.57738/BzPM_0770_2023). The instrument was installed at about 22 m height at the top deck on starboard site. Via a mirror construction the radiometers were observing the surface, i.e, ocean and sea ice, at a viewing angle of about 53° off nadir for 15 min each hour. The actual viewing angle could vary by a few degrees because of ship motion. Also, on six occasions the mirror position was changed to observe at different viewing angles. The data covers the range July 7, 2022 to August 12, 2022. The radiation measurements are given as brightness temperatures in seven K band channels (22.24 - 31.4 GHz), predominantly-vertical polarization at the viewing angle, and seven V band (51.26 - 58 GHz) channels, predominantly-horizontal polarization at the viewing angle. During the cruise the instrument was calibrated with liquid nitrogen on July 7 and July 30. The data is processed with the mwr_pro software (doi:10.5281/zenodo.7973552). Quality flags characterizing the instrument and retrieval performance are set and described. The brightness temperatures are provided for all available times so that it is up to the user to decide whether or not to use the values if quality flags are set. The sanity_receiver_band1, sanity_receiver_band2 and rain_flag are rather strict and data quality might still be satisfying despite the flag being set. However, we recommend to exclude data where visual_inspection_filter_band_1, visual_inspection_filter_band_2 or visual_inspection_filter_band_3 are set.
The Halo Microwave Package (HAMP), deployed onboard the High Altitude and LOng range research aircraft (HALO), performed measurements over the Arctic ocean and sea-ice during the HALO-(AC)³ campaign in March and April 2022. After the transfer flight (RF01) from Oberpfaffenhofen (Germany), 17 research flight (RF) days started from Kiruna, Sweden and heading northwards to the Fram Strait and central Arctic. Here, HAMP measurements were taken in different weather conditions comprising high impact synoptic events such as warm air intrusions, atmospheric rivers, cold air outbreaks or polar lows. We provide a dataset of active and passive microwave HAMP measurements, i.e. from the cloud and precipitation radar and the radiometers respectively. The radar operates at a frequency of 35 GHz while the microwave radiometer measurements comprise 25 channels in the frequency range between 22 and 190 GHz. Our dataset delivers time-series of brightness temperatures from the radiometers, and the radar reflectivity factor and linear depolarization ratio from the radar in a unified format. The unified and processed dataset provides the post-calibrated and quality-controlled measurements from both devices in a collocated temporal 1 Hz resolution applicable for joint analysis. An adherent surface mask distinguishes between three predominant overpassed surface types (land, sea, and sea-ice). The radar measurements are further unified in a vertical grid having 30 m resolution. Our unified dataset allows for wide-spread analysis of evolving arctic cloud and moisture properties over the remote Arctic ocean.
The Halo Microwave Package (HAMP), deployed onboard the High Altitude and LOng range research aircraft (HALO), performed measurements over the Arctic ocean and sea-ice during the HALO-(AC)³ campaign in March and April 2022. After the transfer flight (RF01) from Oberpfaffenhofen (Germany), 17 research flight (RF) days started from Kiruna, Sweden and heading northwards to the Fram Strait and central Arctic. Here, HAMP measurements were taken in different weather conditions comprising high impact synoptic events such as warm air intrusions, atmospheric rivers, cold air outbreaks or polar lows. We provide a dataset of active and passive microwave HAMP measurements, i.e. from the cloud and precipitation radar and the radiometers respectively. The radar operates at a frequency of 35 GHz while the microwave radiometer measurements comprise 25 channels in the frequency range between 22 and 190 GHz. Our dataset delivers time-series of brightness temperatures from the radiometers, and the radar reflectivity factor and linear depolarization ratio from the radar in a unified format. The unified and processed dataset provides the post-calibrated and quality-controlled measurements from both devices in a collocated temporal 1 Hz resolution applicable for joint analysis. An adherent surface mask distinguishes between three predominant overpassed surface types (land, sea, and sea-ice). The radar measurements are further unified in a vertical grid having 30 m resolution. Our unified dataset allows for wide-spread analysis of evolving arctic cloud and moisture properties over the remote Arctic ocean.
The dataset contains daily nc-files of the integrated water vapour and liquid water content from the OCEANET microwave radiometer Haptro (Rose et al., 2005: doi:10.1016/j.atmosres.2004.12.005) during Polarstern cruise PS106. The data is calibrated within the Cloudnet (Illingworth, 2007 doi:10.1175/BAMS-88-6-883 ) processing scheme.
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