GNSS Data

The NGF archives and distributes GNSS data in a variety of product levels, formats and access methods. Product levels distinguish between raw data (Level 0), pre-processed data (Level 1), and post-processed/derived (Level 2) data products. In addition to direct file server access, web based graphical user interfaces, command line clients, and web services are available.

GNSS Data Products				Access Method / Product Format
Data Product Level	Description	Generation Frequency	Creator	File Server	Web Graphical Interface	Web Service
Level 1	Standard rate data (15-sec)	Daily, varies	NGF	RINEX	RINEX	n/a
	High rate data (1-, 2-, 5-sps)	Varies	NGF	RINEX	RINEX	n/a
	Survey-mode (campaign) data	Daily, varies	NGF	n/a	RINEX	n/a
Level 2	Position solution time series	Daily	MIT	ASCII, CSV	ASCII, CSV	ASCII, CSV
	Velocity solutions	Monthly	MIT	ASCII	ASCII	ASCII, CSV
	Position offsets (e.g. coseismic)	Varies	MIT	ASCII	n/a	n/a
	Events (e.g. coseismic)	Varies	MIT	ASCII	n/a	n/a
	Tropospheric parameter estimates	Daily	CWU	ASCII	n/a	n/a
	Position solution QA parameters	Daily, varies	UNR	ASCII	ASCII	n/a
	Position solutions (loose)	Daily	CWU	SINEX	SINEX	n/a
Position solutions (constrained)	Daily	MIT	SINEX	SINEX	n/a

NOTE: We provide Seafloor Geodesy data collections as assembled data sets that include GNSS and other data.

Data Access Methods

Data Access Methods include GUI and command line tools for site search and data access, direct HTTPS File Server access for browsing and command line scripts, REST web services, real-time data access streams, derived products access, and custom data requests. Please review the Data policy for data archived at the NGF.

Data Formats

Community Data Formats have been developed and are hosted at the GAGE Data Center. GAGE (formerly UNAVCO) has helped develop GNSS data and metadata standards, like BINEX, in collaboration with the NGF geosciences community. NGF hosts documentation about the BINEX data and metadata standard developed by the NGF community and GNSS receiver manfacturers.

Data Operations

A collection of Data Operations pages for monitoring of archiving and QC.

Seafloor Geodesy

Seafloor geodesy monitors the precise movements and deformations of the Earth's crust beneath the oceans. Using acoustic signals, GNSS, and specialized seafloor instruments, measurements of shifts in tectonic plates, underwater volcanic activity, and seafloor spreading are possible.

We provide Previously collected seafloor geodesy data as assembled data sets that include GNSS and other data.