Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Greetings all, This past February Radio Occultation data from UCAR's COSMIC program was added to the IDD. This data was provided by Spire Global as part of the NOAA Commercial Data Program Delivery Order 5 (DO5). That above project has run its course, and the data from Spire Global has ceased. Through a new partnership with PlanetIQ <https://planetiq.com/>, COSMIC has resumed processing and sharing this data, which is available on the IDD now; data is on the EXP feed with a typical volume of 80-110MB per hour. Data formats and sizes should be about the same as the previous data set, however the product IDs have changed slightly. Below is a statement from COSMIC providing additional details on the new delivery order and the data, complete with LDM patterns and examples. The NOAA Commercial Data Program <https://www.space.commerce.gov/business-with-noaa/commercial-weather-data-pilot-cwdp/> Radio Occultation Data Buy 2 (RODB-2) Delivery Order 2 (DO2) implements unrestricted data rights for the radio occultation data processed by UCAR <https://www.ucar.edu/> COSMIC <https://cosmic.ucar.edu/>’s CDAAC <https://www.cosmic.ucar.edu/what-we-do/data-processing-center> in near real time, with the goal of making data products available to a wider audience. For DO2 PlanetIQ <https://planetiq.com/> provides observation data from its satellite constellation for processing into higher level neutral atmosphere (up to 3100 profiles/day) and ionosphere products (total electron content). The RODB-2 DO2 data <https://data.cosmic.ucar.edu/gnss-ro/planetiq/noaa/> are made available on a next day basis at CDAAC and will additionally be distributed via Unidata <https://www.unidata.ucar.edu/>’s Internet Data Distribution (IDD) <https://www.unidata.ucar.edu/projects/index.html#idd> service in near-real time. The available IDD products are: 1) Atmospheric profile without moisture information (atmPrf) Full resolution profiles of physical parameters including bending angle, refractivity, dry pressure, dry temperature, impact parameter, etc. versus geometric height above mean sea level. Reference: https://cdaac-www.cosmic.ucar.edu/cdaac/cgi_bin/fileFormats.cgi?type=atmPrf. 2) Atmospheric occultation profile with moisture information included (wetPf2) Atmospheric occultation profile with moisture information included. A gridded analysis or short-term forecast is used to separate the pressure, temperature and moisture contributions to refractivity. This file is interpolated to 100 meter height levels. References: https://cdaac-www.cosmic.ucar.edu/cdaac/cgi_bin/fileFormats.cgi?type=wetPf2 and https://doi.org/10.3390/rs14215614. 3) WMO BUFR (bfrPrf) A low resolution (200 meter) atmospheric profile in the BUFR format. Contains data taken from the atmPhs, atmPrf and wetPrf files, including: header information, occultation location and time; bending angle versus impact parameter profiles; refractivity versus mean sea level geometric height; pressure, temperature, and moisture versus geopotential height profiles. References: https://cdaac-www.cosmic.ucar.edu/cdaac/cgi_bin/fileFormats.cgi?type=bfrPrf and https://preop.romsaf.org/romsaf_bufr.pdf. 4) Absolute total electron content (podTec) Absolute total electron content (TEC) and auxiliary data in netCDF format. Each file contains a TEC track data from one receiver-transmitter satellite pair. Reference: https://cdaac-www.cosmic.ucar.edu/cdaac/cgi_bin/fileFormats.cgi?type=podTec 5) Electron density profiles (ionPrf) An ionospheric data profile for a single occultation in netCDF format. Reference: https://cdaac-www.cosmic.ucar.edu/cdaac/cgi_bin/fileFormats.cgi?type=ionPrf Details for accessing this data on the IDD These products will be added to the IDD EXP feed, with a typical data volume of 80-110MB per hour. You will need to configure your LDM to receive these products; sample Product IDs, REQUEST lines and PQACT entries are below: 1) atmPrf Example LDM/IDD Product ID: gnomesbrt/level2/atmPrf/2023.213/atmPrf_GN03.2023.213.14.54.E12_0001.0001_nc Example LDM Configuration file REQUEST line: REQUEST EXP “gnomesbrt/level2/atmPrf” upstream_IDD_relay Example LDM pattern-action file action: EXP gnomesbrt/level2/atmPrf/([0-9]{4}).([0-9]{3})/(atmPrf.*_nc) FILE -close -overwrite /data/ldm/pub/native/COSMIC/gnomesbrt/atmPfr/\3 2) wetPf2 Example LDM/IDD Product ID: gnomesbrt/level2/wetPf2/2023.213/wetPf2_GN03.2023.213.14.55.E33_0001.0001_nc Example LDM Configuration file REQUEST line: REQUEST EXP “gnomesbrt/level2/wetPf2” upstream_IDD_relay Example LDM pattern-action file action: EXP gnomesbrt/level2/wetPf2/([0-9]{4}).([0-9]{3})/(wetPf2.*_nc) FILE -close -overwrite /data/ldm/pub/native/COSMIC/gnomesbrt/wetPf2/\3 3) bfrPrf Example LDM/IDD Product ID: gnomesbrt/level2/bfrPrf/2023.213/bfrPrf_GN02.2023.213.15.45.C26_0001.0001_bufr Example LDM Configuration file REQUEST line: REQUEST EXP “gnomesbrt/level2/bfrPrf” upstream_IDD_relay Example LDM pattern-action file action: EXP gnomesbrt/level2/bfrPrf/([0-9]{4}).([0-9]{3})/(bfrPrf.*_bufr) FILE -close -overwrite /data/ldm/pub/native/COSMIC/gnomesbrt/bfrPrf/\3 4) podTec Example LDM/IDD Product ID: gnomesbrt/level1b/podTec/2023.213/podTec_GN03.2023.213.14.55.0009.C45.01_0001.0001_nc Example LDM Configuration file REQUEST line: REQUEST EXP “gnomesbrt/level1b/podTec” upstream_IDD_relay Example LDM pattern-action file action: EXP gnomesbrt/level1b/podTec/([0-9]{4}).([0-9]{3})/(podTec.*_nc) FILE -close -overwrite /data/ldm/pub/native/COSMIC/gnomesbrt/podTec/\3 5) ionPrf Example LDM/IDD Product ID: gnomesbrt/level2/ionPrf/2023.214/ionPrf_GN02.2023.214.20.39.G03_0001.0001_nc Example LDM Configuration file REQUEST line: REQUEST EXP “gnomesbrt/level2/ionPrf” upstream_IDD_relay Example LDM pattern-action file action: EXP gnomesbrt/level2/ionPrf/([0-9]{4}).([0-9]{3})/(ionPrf.*_nc) FILE -close -overwrite /data/ldm/pub/native/COSMIC/gnomesbrt/ionPrf/\3 6) All available data If you would like to request all products on one REQUEST line: REQUEST EXP “gnomesbrt” upstream_IDD_relay If you need assistance in configuring your LDM, or have other questions/comments regarding the LDM or IDD, please contact support-idd@xxxxxxxxxxxxxxxx. For additional information regarding the data, please contact COSMIC at cosmicops@xxxxxxxx. Best, -Mike *Mike Zuranski* Data Engineer II Unidata Program Center University Corporation for Atmospheric Research
ldm-users archives: