JPL's Final, Rapid, Ultra and Real-Time GNSS orbit and clock products can be found at the following URL:

https://sideshow.jpl.nasa.gov/pub/JPL_GNSS_Products/

Product types/file types

There are up to ten different types whose formats are described in the following links (or appropriate text files in $GCORE/file_formats), further detail on the file content is given with the actual product definitions.

Piecewise Constant Model Parameter Format for .pcm files containing antenna offsets (file_formats/PiecewiseConstantModel.pcm.dox)
quaternions format for .quat files containing quaternions (file_formats/quaternions.dox)
gdcov format for .gdcov files containing covariances of estimated parameters (file_formats/gdcov.dox)
pos_goa format for .pos files containing satellite orbits (file_formats/pos_goa.dox)
Time Dependent Parameters (tdp files) for .tdp files containing clocks (file_formats/TimeDependentParameter.tdp.dox)
GEOP File Format for .eo files containing Earth Orientation (file_formats/GEOP.dox)
Shadow History file format for .shadhist files (file_formats/shadowHistory.dox)
meta file format for .meta files (file_formats/meta.dox)
WLPB list file format for .wlpb files (file_formats/wlpb.dox)
xfile format for .x files (file_formats/xfile.dox)

A .done file may also appear after a given set of Ultra_Rapid and/or Rapid products are delivered. Although these files may be visible externally, they are intended for internal house-keeping only and are subject to change without notice.

General naming and storage conventions

The following description of these products adopts the convention:

YYYY = 4-digit Year
MM   = 2-digit Month
DD   = 2-digit Day

All products provided on the https site are in compressed (.gz) form.

The Products and https storage

Final Products

Final products are available at: https://sideshow.jpl.nasa.gov/pub/JPL_GNSS_Products/Final/ and are organized in yearly ("YYYY") subdirectories.

The Final product for a day is typically available with a latency of 14-days. The products cover a 30-hour window centered on noon of each day.

Final products for each day include:

# "Fiducial" solution in the frame specified by the meta file
YYYY-MM-DD.meta.gz         - Contains specification of transmitter and receiver
                             antenna calibration file used to generate orbit and
                             clock solutions as well as frame information
YYYY-MM-DD.shadhist.gz     - Shadow events
YYYY-MM-DD.pcm.gz          - Transmitter antenna offsets in PCM format 
YYYY-MM-DD.quat.gz         - Satellite attitude quaternions in quat format
YYYY-MM-DD.pos.gz          - Orbits of all satellites in pos_goa format
YYYY-MM-DD.tdp.gz          - Clocks (5-minute) and Yaw Rates of all satellites in 
                             tdp format
YYYY-MM-DD_hr.tdp.gz       - High-Rate (30-second) Clocks and Yaw Rates of all 
                             satellites in tdp format
YYYY-MM-DD.eo.gz           - Earth orientation parameters in GEOP format 
YYYY-MM-DD.wlpb.gz         - Global set of wide lane and phase biases, which maybe
                             used in ambiguity resolution when using fiducial products
YYYY-MM-DD.x.gz            - X-file provided 7 parameter transformation to convert
                             fiducial-free solution into the frame defined in .meta file
YYYY-MM-DD.gdcov.gz        - Position and EOP estimates with full covariance information
                             in gdcov format

# No-net rotation solution                             
YYYY-MM-DD_nnr.pos.gz      - Orbits of all satellites in pos_goa format
YYYY-MM-DD_nnr.tdp.gz      - Clocks (5-minute) and Yaw Rates of all satellites in tdp
                             format
YYYY-MM-DD_nnr_hr.tdp.gz   - High-Rate (30-second) Clocks and Yaw Rates of all
                             satellites in tdp format
YYYY-MM-DD_nnr.eo.gz       - Earth orientation parameters in GEOP formatfor 
YYYY-MM-DD_nnr.wlpb.gz     - Global set of wide lane and phase biases, which maybe used
                             in ambiguity resolution when using no-net-rotation products
YYYY-MM-DD_nnr.x.gz        - X-file provided 7 parameter transformation to convert
                             no-net-rotation solution into the frame defined in the
                             .meta file.
YYYY-MM-DD_nnr.gdcov.gz    - Position and EOP estimates with full covariance information
                             based on no-net-rotation estimates in gdcov format

# Non-fiducial / fiducial-free solution
YYYY-MM-DD_nf.pos.gz       - Orbits of all satellites in pos_goa format
YYYY-MM-DD_nf.tdp.gz       - Clocks (5-minute) and Yaw Rates of all satellites in tdp
                             format
YYYY-MM-DD_nf_hr.tdp.gz    - High-Rate (30-second) Clocks and Yaw Rates of all 
                             satellites in tdp format
YYYY-MM-DD_nf.eo.gz        - Earth orientation parameters in GEOP format 
YYYY-MM-DD_nf.wlpb.gz      - Global set of wide lane and phase biases, which maybe
                             used in ambiguity resolution when using fiducial-free products
YYYY-MM-DD_nf.gdcov.gz     - Position and EOP estimates with full covariance information
                             based on fiducial-free estimates in gdcov format

Rapid and Rapid_GE Products

Rapid and Rapid_GE products are available at: https://sideshow.jpl.nasa.gov/pub/JPL_GNSS_Products/Rapid/ https://sideshow.jpl.nasa.gov/pub/JPL_GNSS_Products/Rapid_GE/ and are organized in yearly ("YYYY") subdirectories.

The Rapid product for a day is typically available by 16:00 UTC of the following day. The products cover a 30-hour window centered on noon of each day.

Rapid "fiducial" products for each day are the same as the Final "fiducial" products, except that no .x file is provided. A .done file may also appear:

YYYY-MM-DD.hh.mm.done     - hh,mm = hour, minute of the last data point for the 
                            current day.

Ultra Products

Ultra products are available at: https://sideshow.jpl.nasa.gov/pub/JPL_GNSS_Products/Ultra/ and are organized in yearly ("YYYY") subdirectories.

They are very similar to Rapid products except for the absence of a high-rate clock (_hr.tdp.gz) product and a faster update cadence.

Ultra products are typically available within 2-hours of the last data point used in the solution (also the last solution epoch) with a data span of 29 hours and 55 minutes. In order to meet a sub-daily latency with daily products, the last one or two days of products will be updated with each hourly delivery.

The data files (YYYY-MM-DD) will eventually span from 21:00 on the day before to 02:55 on the next day.

If there are any data on a given day, the products will exist for that day. Thus, the first ultra product for a given day is the arc ending at 00:55 on that day.

The ultra products from the current/previous day will be updated until it roughly aligns with our standard 30-hour Final and Rapid arcs (i.e. starts at 21:00 on previous day, ends at 02:55 on the next day).

As a result of the above, both the current and previous day are updated for the arcs ending at 00:55, 01:55, and 02:55.

Real-time Products

JPL computes real-time obits and clocks (latency from real-time of a few seconds) and posts the results with about a one-minute latency to:

https://sideshow.jpl.nasa.gov/pub/JPL_GNSS_Products/RealTime

at the top level there are sub-directories for each constellation, currently:

gps
galileo
glonnass

below each constellation directory, there are sub-directories with two character ids, <centerId>, corresponding to the JPL processing center, for eaample, dn = Denver, then sub-directories by year.

https://sideshow.jpl.nasa.gov/pub/JPL_GNSS_Products/RealTime/<constellation>/<centerId>/<YYYY>

Example:

https://sideshow.jpl.nasa.gov/pub/JPL_GNSS_Products/RealTime/gps/dn/2024

within the year directory there are daily data files and a sub-directory,

https://sideshow.jpl.nasa.gov/pub/JPL_GNSS_Products/RealTime/<constellation>/<centerId>/<YYYY>/minute

The current active day is appended every minute and can be constructed locally with low bandwidth and latency by accessing the minute directory.

Real-time daily file naming convention

C_YYYY-MM-DD_JJJ_SSI_RRR.EXT.gz, daily file names

where:

C = “G” for GPS, ”R” for GLONASS, “E” for Galileo, etc.
YYYY = Year
MM = Month of year
DD = Day of month
JJJ = 3-digit day of year
Note: The date and time is associated with seconds since J2000 GPS(continuous seconds past Jan. 1 11:50:47 UTC), not UTC
SS = Source location (two character id specfifying the JPL processing center, examples: “dn”, “oc”, ”ca”, “nv” )
I = Integer, constellations with the same SSI, are guaranteed to come from the same POD/clock process and thus share a common reference time
RRR = 3-digit sampling interval in seconds (e.g., ”001” for 1 s data, “300” for 5 min data, etc.) for “pos”, “tdp”, and “quat” files
EXT = file extension (“pos”, “quat”, “tdp”, “eo”, “meta”, “pcm”), see "Product types/file types" section above for formats, content.

Example:

  G_2024-01-01_001_dn2_060.pos.gz
  G_2024-01-01_001_dn2_001.tdp.gz
  G_2024-01-01_001_dn2_060.tdp.gz

note the clocks are given at multiple rates to support high rate navigation.

the files in the minute directory have an added field in there names for the hour and minute of the day:

C_YYYY-MM-DD_JJJ_hhmm_SSI_RRR.EXT.gz, minute files

hhmm, hh=hour, mm=minute