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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Greetings, We are partnering with UCAR's COSMIC <https://cosmic.ucar.edu/> program to provide radio occlusion data provided by Spire Global <https://www.spire.com/>. We are planning on making these products available on the IDD beginning tomorrow morning (2/8/2023), data will be on the EXP feed with a typical volume of 80-110MB per hour. Here is a statement from COSMIC detailing these products, with additional information on how to access the data on the IDD below: The NOAA Commercial Data Program <https://www.space.commerce.gov/business-with-noaa/commercial-weather-data-pilot-cwdp/> Delivery Order 5 (DO5) 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 DO5 Spire Global <https://www.spire.com> provides observation data from its satellite constellation for processing into higher level neutral atmosphere (about 3300 profiles/day) and ionosphere products. The DO5 data <https://data.cosmic.ucar.edu/gnss-ro/spire/noaa/> are made available on a next day basis at CDAAC and will now 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 DO5 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. *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:* spireert/level2/atmPrf/2023.031/atmPrf_S115.2023.031.17.59.G07_0001.0001_nc *Example LDM Configuration file REQUEST line:* REQUEST EXP “spireert/level2/atmPrf” *upstream_IDD_relay* *Example LDM pattern-action file action:* EXP spireert/level2/atmPrf/([0-9]{4}).([0-9]{3})/(atmPrf_.*_nc) FILE -close -overwrite /data/ldm/pub/native/COSMIC/spireert/atmPfr/\3 2) wetPf2: *Example LDM/IDD Product ID:* spireert/level2/wetPf2/2023.031/wetPf2_S115.2023.031.17.59.G07_0001.0001_nc *Example LDM Configuration file REQUEST line:* REQUEST EXP “spireert/level2/wetPf2” *upstream_IDD_relay* *Example LDM pattern-action file action:* EXP spireert/level2/wetPf2/([0-9]{4}).([0-9]{3})/(wetPf2.*_nc) FILE -close -overwrite /data/ldm/pub/native/COSMIC/spireert/wetPf2/\3 3) bfrPrf: *Example LDM/IDD Product ID:* spireert/level2/bfrPrf/2023.031/bfrPrf_S115.2023.031.17.59.G07_0001.0001_bufr *Example LDM Configuration file REQUEST line:* REQUEST EXP “spireert/level2/bfrPrf” *upstream_IDD_relay* *Example LDM pattern-action file action:* EXP spireert/level2/bfrPrf/([0-9]{4}).([0-9]{3})/(bfrPrf.*_nc) FILE -close -overwrite /data/ldm/pub/native/COSMIC/spireert/bfrPrf/\3 4) podTec: *Example LDM/IDD Product ID:* spireert/level1b/podTec/2023.031/podTec_S149.2023.031.18.45.0014.G23.00_0001.0001_nc *Example LDM Configuration file REQUEST line:* REQUEST EXP “spireert/level1b/podTec” *upstream_IDD_relay* *Example LDM pattern-action file action:* EXP spireert/level1b/podTec/([0-9]{4}).([0-9]{3})/(podTec.*_nc) FILE -close -overwrite /data/ldm/pub/native/COSMIC/spireert/podTec/\3 OR, if you would like to request all four products on one REQUEST line: REQUEST EXP “spireert” *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
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