Plug and Play For Earth Science

A Free GPS Data Processing and Data Products System

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Citation:

• Henceforth please use the following for citation of data products obtained on our web site:
• 
  
• 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.

Access GPS Time Series:

• Graphical MAP BROWSE with links to station pages.

• Find links to station pages and metadata using station name lists and/or text files:

• Stations with final solutions (24 hours sample rate, ~2 week latency):  ( HTML / TXT )
• Stations with rapid solutions (24 hours sample rate, 24 hour latency):  ( HTML / TXT )
• Stations with rapid solutions (5 minute sample rate, 24 hour latency):  ( HTML / TXT )
• Stations with ultra rapid solutions (5 minute sample rate, ~2 hour latency):  ( HTML / TXT )
• All time series are provided in a global (IGS08) reference frame and in a North America frame (NA12) for stations on the North American Plate.

• Go directly to a station's page:

• http://geodesy.unr.edu/NGLStationPages/stations/<ssss>.sta
• where <ssss> is the station 4-character ID (use caps).

• Search using lat/lon, time period, data type, format, etc.: UNAVCO GSAC

• Find/Access stations and data using UNAVCO web services

• Time series files direct access:

• env format: http://geodesy.unr.edu/gps_timeseries/tenv3/<frame>/<ssss>.<frame>.tenv3
• xyz format: http://geodesy.unr.edu/gps_timeseries/txyz/<frame>/<ssss>.<frame>.txyz2
• where <ssss> is the station 4-character ID (use caps) and <frame> is NA12 or IGS08.
• File formats: README xyz README env

Time Series Plot Files:

• Plots of all available time series are availalbe on the station pages.
• Plots can also be accessed directly if the station 4 character ID and desired reference frame are known, e.g.:
• For station P090 solutions in the IGS08 reference frame are plotted at:
• http://geodesy.unr.edu/tsplots/IGS08/TimeSeries/P090.png
• "Cleaned" time series (outliers removed) are also available, e.g.:
• http://geodesy.unr.edu/tsplots/IGS08/TimeSeries_cleaned/P090.png
• For 5 minute rapid plots:
• http://geodesy.unr.edu/tsplots/rapid5min/P090.png
• And 5 minute ultra rapid plots:
• http://geodesy.unr.edu/tsplots/ultra5min/P090.png

Velocity Fields:

• MIDAS velocities are provided for all stations with over 1 year of data. Files are provided in two reference frames:
• NA12
• IGS08
• README for MIDAS file data format
• Citation for these files available here (open access!) (Blewitt et al., 2016)

Steps Database:

• File includes known equipment change events and potential earthquake steps
• Database (large text file)
• Steps file README

Data Processing Quality Assurance Files:

Useful for assessing solution quality and debugging issues with processing
• ftp access files by station
• ftp access files by date
• ftp access The Whole Burrito (as one big tar file)
• Detailed Documentation

Decimal Year Convention

• Translation file (text with DDMMMYY yyyy.yyyy)
• Explanation of the convention

Access Using Your Own Software and Workflow

• Most data products (e.g. time series, summary files, steps) are available as text files and are updated daily to weekly.
• In many cases files are machine readable, and can be obtained using wget/curl commands in scripts for incorporation into your local analyses.

NA12 Reference Frame

• Link to frame definition and publications.
• Link to transformation files.

Troposphere Products

• Link to ftp directory with all troposphere files.
• Link to README file with brief explanation of troposphere files.
• Link to IGS SINEX troposphere file format

GPS Data Processing Strategy

• Summary Description

Acknowledgements

• Plug and Play GPS is funded by NASA under project NNX14AJ52A, Plug and Play GPS for Earth Scientists: Providing Immediate Access to Low-Latency Geodetic Products for Rapid Modeling and Analysis of Natural Hazards
• Also see our Acknowledgements Page