Derived Data Products
Derived products (also referred to as Level 2 Products) are created from raw data and other lower level products such as RINEX. Please see our Data Products definitions at UNAVCO. The GAGE GPS Analysis Centers (AC’s) at New Mexico Tech and Central Washington University, and the GAGE GPS Analysis Center Coordinator (ACC) at MIT, analyze data and generate products from more than 2,000 GPS stations in the PBO, COCONet and SCIGN networks as well as NGS CORS and other regional stations in middle and eastern North America. Key reference: Reviews of Geophysics Publication on PBO GPS Data Analysis Methods and Products (Herring et al., 2016).
Quick Links to GPS Data Products
- GPS Data Products via FTP Site
UNAVCO’s primary direct data access point. Subdirectories contain time series, velocities, offsets, earthquake event files, hydrologic loading displacements, etc.
- GPS Data and Products via Data Archive Interface (DAIv2)
UNAVCO’s primary interactive data access point. NOTE: the DAIv2 requires Flash to be installed and working in your browser.
- GPS Site Coordinates via ASCII File
List of site coordinates for all active stations processed by the GAGE AC’s and ACC for the most recent epoch (full 24 hour day) available. List is generated dynamically via web services and is continuously updated. Available in IGS08 and NAM08 reference frames.
- GPS Time Series via DAI Interactive Plotter
Plots north-south, east-west, and vertical GPS positions over time, for one or more stations on a single plot, and provides site event information such as equipment changes. Also provides easy and direct access to the time series as a simplified, downloadable CSV file. After launching the viewer, enter one or more GPS site 4-char ID(s) in the white field in the upper left (if more than one site then use spaces or commas between 4-char ID’s (e.g., P160, p161). The interactive time series tool is also accessible from within the DAIv2 (by selecting a set of stations and right-clicking). NOTE: the DAIv2 requires Flash to be installed and working in your browser.
- GPS Time Series via Web Services
Retrieves the daily position time series for the station identified by four character id, reference frame, and date range.
- GPS Time Series via Network Monitoring Station Pages (UNAVCO Operated Stations Only)
NOTE: intended for station status only. Some data and products are linked from these station pages but this is NOT a primary data access point as only a subset of existing stations/data are available from this interface. The primary data access points for UNAVCO data are the DAIv2 and the FTP site. See also: Nearby timeseries plots.
- GPS Site Velocities via ASCII file
Long term GPS velocity field solutions. Estimates of offsets from antenna changes, equipment problems (such as broken radomes), and earthquakes are incorporated. Solutions are from the most recent “snapshot” velocity solution, generated approximately monthly. Available in IGS08 and NAM08 reference frames.
- GPS Velocities via KMZ
Long term GPS velocity field solutions for the PBO network. Estimates of offsets from antenna changes, equipment problems (such as broken radomes), and earthquakes are incorporated. NOTE: Best used with Google Earth Pro desktop.
- GPS Velocities via Web Services
Retrieves the daily velocity time series for the station identified by four character id, reference frame, and date range.
Analysis Information and Resources
Quarterly technical reports describing GAGE GPS analysis activities are provided by the Analysis Center Coordinator at MIT. These reports summarize statistics for all stations analyzed during the period as well as processing notes, station offsets, etc.
User Notices and Advisories
The following ZIP/tar files include all the processing files currently used by the ACC/AC’s to generate GAGE GPS data products.
Last modified: Tuesday, 26-Jun-2018 15:56:09 UTC