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Archive of NOAA Continuously Operating Reference Stations (CORS) Network (NCN)
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The National Geodetic Survey's (NGS) NOAA Continuously Operating Reference Stations
(CORS) Network (NCN) provides Global Navigation Satellite System (GNSS) data consisting
of carrier phase and code range measurements in support of three dimensional positioning,
meteorology, space weather, and geophysical applications throughout the United States,
its territories, and a few foreign countries. Surveyors, GIS users, engineers, scientists,
and the public at large that collect GPS data can use CORS data to improve the precision
of their positions. CORS enhanced post-processed coordinates approach a few centimeters
relative to the National Spatial Reference System (NSRS), both horizontally and vertically.
The CORS network is a multi-purpose cooperative endeavor involving government, academic,
and private organizations. The sites are independently owned and operated. Each agency
shares their data with NGS, and NGS in turn analyzes and distributes the data free
of charge.
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Archive of NOAA Continuously Operating Reference Stations (CORS) Network (NCN) |
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10.25921/wc4r-ee36
NCEI Metadata ID: gov.noaa.ngdc.stp.terrestrial:G10019
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Continuously Operating Reference Station (CORS) |
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Continuously Operating Reference Station (CORS) Coordinate Update Policy |
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Getty Thesaurus of Geographic Names |
Getty Thesaurus of Geographic Names |
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GCMD Data Center Keywords |
Global Change Master Directory (GCMD) Data Center Keywords |
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GCMD Instrument Keywords |
Global Change Master Directory (GCMD) Instrument Keywords |
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GCMD Platform Keywords |
Global Change Master Directory (GCMD) Platform Keywords |
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GCMD Project Keywords |
Global Change Master Directory (GCMD) Project Keywords |
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GCMD Science Keywords |
Global Change Master Directory (GCMD) Science Keywords |
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International DOI Foundation (IDF) |
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NOAA National Centers for Environmental Information |
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NOS Data Explorer Themes |
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http://geodesy.noaa.gov/INFO/Policy/CORS-coordinate-policyv4_20Dec2011.pdf |
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Reference frames are updated periodically according to the policy. |
information |
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http://www.getty.edu/research/tools/vocabularies/tgn/index.html |
Getty Thesaurus of Geographic Names Online Page |
This page provides an interface to search the Getty Thesaurus of Geographic Names. |
information |
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https://doi.org/10.25921/wc4r-ee36 |
Metadata Landing Page |
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information |
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https://www.class.noaa.gov/saa/products/search?sub_id=0&datatype_family=CORS |
CLASS Data Search and Order |
Search the CORS data archive and submit an order for the dataset via the interface. |
order |
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https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords |
Global Change Master Directory (GCMD) Keywords |
The information provided on this page seeks to define how the GCMD Keywords are structured,
used and accessed. It also provides information on how users can participate in the
further development of the keywords. |
information |
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https://www.ncei.noaa.gov/contact |
NCEI Contact Information |
Information for contacts at NCEI. |
information |
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https://www.ngs.noaa.gov/CORS/ |
National Geodectic Survey - Continuously Operating Reference Stations (CORS) |
Home page for CORS main facility in Silver Spring, MD |
information |
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Latitude Real |
Latitude is measured from the equator, with positive values going north and negative
values going south |
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Longitude Real |
Longitude is measured from the Prime Meridian (which is the longitude that runs through
Greenwich, England), with positive values going east and negative values going west |
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Orthometric height (m) Real |
Distance along a plumb line, from the geoid to a point. The plumb line is a line regarded
as directed exactly toward the earth's center of gravity. The geoid is the equipotential
surface of the Earth's gravity field which best fits, in a least squares sense, global
mean sea level. |
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Ellipsoid or geodetic height (m) Real |
Distance along ellipsoid normal, from ellipsoid to a point. Due to rotation, the earth
assumes the shape of a sphere that is flattened at the poles and bulging at the equator
(an ellipse). Cartesian coordinates have their origin at the center of ellipsoid. |
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1994-02-01T00:00:00 |
INGEST: NGS has automated daily routines that harvests daily observational files in
either binary or RINEX format at the original sampling rate, the daily broadcast ephemeris
files, orbit files, and any corresponding meteorological files. For the special case
use of FAA and USCG streaming data that are used as input to NOAA models, the streaming
feed is harvested to a binary, incrementally-built hourly file.
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1994-02-01T00:00:00 |
PROCESSING: Data ingested by NGS are processed into RINEX format and made available
online in either an hourly or daily cadence. Aside from positioning, processing includes
the insertion of NGS headers, quality checks, and the production of quality control
files (teqc summary files). Other scheduled routines retrieve higher level orbit files
as they are made available.
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1994-02-01T00:00:00 |
DISTRIBUTION: NGS makes hourly and daily files available online. For the special case
of binary FAA and USCG data, NGS pushes these files to the Data Center every 5 minutes.
The Data Center stages the data for internal NOAA groups, who harvests the data at
a predetermined sub-hourly period as input to their algorithms. The completed binary
hourly file at the Data Center is kept locally. At the end of the day, a daily tar
file consisting of the hourly data are created and staged for archive.
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1994-02-01T00:00:00 |
RETENTION: NGS retains the data at the original at-sampling rate for 30 days. After
30 days, NGS decimates its online holdings to a 30-second sampling rate.
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1994-02-01T00:00:00 |
ARCHIVE: Prior to the 30-day mark, the RINEX at-sampling rate data is copied to NCEI.
Aftter 30 days, NCEI then stages, archives, and distributes the CORS data via the
CLASS infrasturcture. For the special use case, the daily binary files from 4 days
ago are archived by NCEI to CLASS.
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2015-04-22T00:00:00 |
NOAA created the National Centers for Environmental Information (NCEI) by merging
NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC),
and National Oceanographic Data Center (NODC), including the National Coastal Data
Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations
Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
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