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
