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NOAA CLASS archive: Continuously Operating Reference Stations (CORS)

NOAA CLASS archive: Continuously Operating Reference Stations (CORS) - The National Geodetic Survey (NGS), an office of NOAA's National Ocean Service (NOS), coordinates a network of geodetic-quality CORS stations that provide Global Positioning System (GPS) carrier phase and code range measurements in support of 3-dimensional positioning activities throughout the United States and its territories. The positions of these CORS sites help define the National Spatial Reference System (NSRS). NGS defines and manages the NSRS - the framework for latitude, longitude, height, scale, gravity, orientation and shoreline throughout the U.S. The NSRS provides a consistent national coordinate system to support mapping, charting, navigation, boundary determination, property delineation, infrastructure development, resource evaluation surveys, and scientific applications. The CORS system enables positional accuracies that approach a few centimeters relative to the NSRS, both horizontally and vertically.<br/><br/> While every effort is made to retain data in the original at-sampling rate, there may be cases where only the 30-second decimated rate data exists. Data availability (note latency from present day) for RINEX data is archive start date on 1994:112 and current date at 32-days before present; for raw GPS data (selected sites) is archive start date on 2004:193 and current date at 5 days before present.
Cite this dataset when used as a source.
  • ID not available.
Order Data
  • CLASS Homepage (order)
    Order options for NGS Continuously Operating Reference Stations (CORS) datasets archived and distributed at CLASS.
Distribution Formats
  • ASCII (Version: 2.11)
    • File Specification: Receiver Independent Exchange Format (RINEX)
    • File Compression: GNU zip compression (gzip)
Distributor DOC/NOAA/CLASS > Comprehensive Large Array-data Stewardship System, NOAA, U.S. Department of Commerce
(828) 271-4850 x3183
info@class.noaa.gov
Time Period: 2010-10 to Present
Spatial Reference System: NAD83ITRF00
Spatial Bounding Box Coordinates:
N: 90
S: -90
E: 180
W: -180
Documentation links not available.
Date(s)
  • publication: 2010-10
Dataset Progress Status Under development
Data Update Frequency: Daily
Supplemental Information:
The United States operates the Global Positioning System (GPS).
The term Global Navigation Satellite Systems (GNSS) has been created to
reference all navigation satellite systems. GNSS encompasses the U.S. GPS
system, the Russian Federation GLONASS system, and any future systems such as
Europe's Galileo or China's Compass.
Purpose: NGDC archives the CORS data set as per the NOAA/NOS Records Disposition Schedule, section 1602-12.
Originator(s)
  • DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Resource Provider(s)
  • DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce
Publisher(s)
  • DOC/NOAA/CLASS > Comprehensive Large Array-data Stewardship System, NOAA, U.S. Department of Commerce
Acknowledgment(s)
  • NGS coordinates a network of CORS stations from over 200 organizations such as federal, state, and local governments, academia, the private sector, and international groups.
Theme keywords NASA/GCMD Earth Science Keywords
  • EARTH SCIENCE > Solid Earth > Geodetics/Gravity > Reference Systems
  • EARTH SCIENCE > Solid Earth > Geodetics/Gravity > Control Surveys
  • EARTH SCIENCE > Solid Earth > Geodetics/Gravity > Crustal Motion
  • EARTH SCIENCE > Solid Earth > Tectonics > Plate Tectonics
  • EARTH SCIENCE > Sun-earth Interactions > Solar Energetic Particle Properties > Total Electron Content
GCMD Platform Keywords
  • NAVSTAR > NAVSTAR Global Positioning System
  • GPS > Global Positioning System Satellites
  • GROUND-BASED OBSERVATIONS
  • GROUND STATIONS
  • GNSS > Global Navigation Satellite Systems
  • GLONASS > Global'naya Navigatsionnaya Sputnikovaya Sistema
Place keywords NASA/GCMD Location Keywords
  • Geographic Region > Global
Stratum keywords None
  • Crust
  • Troposphere
  • Ionosphere
Use Constraints
  • Access Constraints: None; Use Constraints: None; Distribution Liability: While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Access Constraints
  • Access Constraints: None; Use Constraints: None; Distribution Liability: While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Fees
  • None
Lineage information for: series
Processor
  • DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce
Source Datasets
  • NOAA CLASS archive: Continuously Operating Reference Stations (CORS)
    • Description of Source: Source Contribution: GNSS data in RINEX format (ASCII) and station metadata (ASCII) digital files via FTP
    • Temporal extent used: 2010-11 to Present
Lineage information for: series
Processing Steps
  • 1993-12-08T00:00:00 - U.S. Air Force Space Command (AFSC) formally declared the GPS satellite constellation consisting of 24 GPS satellites (Block I and Block II/IIA) as having met the requirement for Initial Operational Capability (IOC).
  • 1995-04-27T00:00:00 - The U.S. Air Force Space Command (AFSC) formally declared the GPS satellite constellation as having met the requirement for Full Operational Capability (FOC) as of April 27, 1995. Requirements include 24 operational satellites (Block II/IIA) functioning in their assigned orbits and successful testing completed for operational military functionality.
Acquisition Information (collection)
Instrument
  • GPS Receiver
  • GNSS receiver
Platform
  • GPS > Global Positioning System
  • GLONASS > Global'naya Navigatsionnaya Sputnikovaya Sistema
Operation
  • GNSS > Global Navigation Satellite System
Last Modified: 2013-08-05
For questions about the information on this page, please email: Francine.Coloma@noaa.gov