Link to our Data Products Page:

• The Plug and Play Portal with Lists of all data products

Quick Links to Data Products:

• Map Browse GPS Stations
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• All Stations Processed
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• MAGNET GPS network
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• Direct link to MAGNET RINEX data
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• Publications
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• Guide to QA Files
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• GPS Data Processing Strategy IGS14
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• New!: GPS Data Processing Strategy IGS20
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Citation of Data Products


Henceforth please use the following for citation of our data products:

Blewitt, G., W. C. Hammond, and C. Kreemer (2018), Harnessing the GPS data explosion for interdisciplinary science, Eos, 99, https://doi.org/10.1029/2018EO104623.
Please also note that many stations have an original data citation that should also be referenced.

When possible we have provided links to the original data dois on our station pages.



Browse Lists of Stations



• All Stations Processed
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• Stations with rapid 5 minute sample rate solutions (latency 24 hours)
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Above lists have links to station pages.



Tectonic Plates


Each GPS station is associated with one or more tectonic plates, as defined by Bird, 2002. Every station is on at least one plate, but some stations can have more than one plate associated with them if the second plate is close (<200 km). For every station there is at least one large plate in the set assigned to it (the large plates being PA, NA, SA, EU, AF, AN, AU). A text file that gives the plate associated with each station is available HERE.
This directory also contains files for each frame ("plate_??.txt" where ?? is the 2-character plate designation) that list the stations assocaited with each plate.

The plate velocity frames are defined using Euler rotation poles found in the supplement of Kreemer et al., 2014. and also at this link.
To be entirely consisent with the assumed kinematic model, plate velocity at any latitude and longitude can be computed using the formulas (B1) and (B2) in Kreemer et al., 2014, where Earth’s radius R = 6371 km.



MIDAS Velocity Fields


Please note: The links below are for the new solutions in IGS20. For the previously available IGS14 solutions click: HERE

• MIDAS Velocities:


• IGS20 Reference Frame
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• Plate Reference Frames:


• AF - Africa
• AN - Antarctica
• AR - Arabia
• AU - Australia
• BG - Bering
• BU - Burma
• CA - Caribbean
• CO - Cocos
• EU - Eurasian
• IN - Indian
• MA - Mariana
• NA - North America
• NB - North Bismark
• NZ - Nazca
• OK - Okhotsk
• ON - Okinawa
• PA - Pacific
• PM - Panama
• PS - Philippine Sea
• SA - South America
• SB - South Bismark
• SC - Scotia
• SL - Shetland
• SO - Somalia
• SU - Sunda
• WL - Woodlark

• MIDAS rates in other legacy reference frames:
• In NA12 Reference Frame
• In IGS08 Reference Frame
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• More Information:
• MIDAS velocity file format README
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• Download the MIDAS code and examples
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• MIDAS software release notes
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Vertical Land Motion (VLM) Using GPS Imaging:

• Global VLM page, with focus on tide gauges
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• File with GPS constraints at tide gagues (text)
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Downloadable Lists of GPS Data Holdings:

• Download list of GPS station latitude, longitude, and heights
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• Download list of GPS stations sorted (in reverse order) by date added to NGL system (yyyy_ddd)
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• Stations with 24 hour sample rate solutions, final orbits, 2 week latency.
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• Stations with 24 hour sample rate solutions, rapid orbits, 24 hour latency.
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• Stations with 5 minute sample rate solutions, rapid orbits, 24 hour latency.
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The linked text files above are updated daily and include: Station Name, Latitude, Longitude, Height, XYZ coordinates, data begin and end dates, number of solutions and station operator original site name.

Database of Potential Step Discontinuities

• Link to master steps database.
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• README for steps database.

Troposphere Products

Link to directory with all troposphere files.

README file explaining troposphere files.

Link to IGS SINEX format description.

Decimal Year Convention:

• Explanation and translation file
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Monuments

For about half of all GPS stations processed at NGL we have been able to extract and tabulate information about the station monuments from the IGS log files. This information includes description of the monument, its foundation construction, height, depth, and geologic enviroment when available. This information can be used to assess the factors contributing to station stability, error checking and tracking down issues in the time series, studies of noise characteristics, etc.

This information is now posted in the: Monument Table

Loading Predictions

We now provide displacement predictions from models of geophysical surface loading. Three-component displacement predictions from non-tidal atmospheric, non-tidal ocean, hydrological model, and GRACE mascon-based equivalent water height, and reservoirs within the continentnal united states are included for all days for which we provide 24 hour solutions.

The data are provided as east, north, up triplets concatenated to the end of lines in our .tenv3 files. The new files with the appended triplets can be found linked from every station page and also en masse at this link.

See this Readme File for an explanation of the columns in the extended .tenv3 files.

Plots of the predictions for vertical motions are also available via a tab on the station pages next to the time series plots, or for all stations in this directory.

System Status Notes

We are beginning to transition our GPS station pages to solutions based on the IGS20 framework, new GipsyX software, orbit and clock products from JPL. During this period of transition some issues may briefly affect products on our web pages.

The last final solutions available in IGS14 framework are August 24, 2024. They will be found in this directory: https://geodesy.unr.edu/gps_timeseries/IGS14.