Global Navigation Satellite System Orbit Products from NASA CDDIS
Entry ID: GNSS_orbits1

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Summary
Abstract: Global Navigation Satellite System data consists of the U.S. Global Positioning System (GPS) and the Russian GLObal NAvigation Satellite System (GLONASS) data sets. The satellites transmit the ranging codes on two radio-frequency carriers, allowing the locations of GNSS receivers to be determined with varying degrees of accuracy, depending on the receiver and post-processing of the data.

Analysis Centers (ACs) of the International GNSS Service (IGS) retrieve GNSS data on regular schedules to produce precise orbits identifying the position and velocity of the GNSS satellites. These orbits are determined sub-daily (ultra-rapid generation), daily (rapid generation), and weekly (final IGS product). The IGS Analysis Center Coordinator retrieves these individual solutions and generates the official IGS combined orbit products. The orbits generated by the individual ACs and the combination products generated by the ACCs are available at the CDDIS. These orbits can be used to determine precise coordinates of the observing stations, gravity field parameters, and Earth orientation parameters.

Related URL
Link: GET DATA
Description: GNSS orbit product holdings at CDDIS via ftp


Link: GET DATA
Description: CDDIS GNSS data and product summary information


Link: VIEW PROJECT HOME PAGE
Description: International GNSS Service


Geographic Coverage
 N: 90.0 S: -90.0  E: 180.0  W: -180.0

Data Set Citation
Dataset Originator/Creator: J.M. Dow, R.E. Neilan, G. Gendt
Dataset Title: The International GPS Service (IGS): Celebrating the 10th Anniversary and Looking to the Next Decade
Dataset Series Name: Proceedings of sessions coordinated by Panel on Satellite Dynamics (PSD1) and COSPAR Sub-Commission B2.1 from 35th COSPAR Scientific Assembly, Paris, July 2004
Dataset Release Date: 30 August 2005
Dataset Release Place: The Netherlands
Dataset Publisher: Elsevier Ltd.
Version: 36 vol. 36, no. 3, pp. 320-326
Issue Identification: Advances in Space Research
Data Presentation Form: 35th COSPAR Scientific Assembly, Paris, July 2004
Dataset DOI: doi:10.1016/j.asr.2005.05.125
Online Resource: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V3S-4H0J...


Temporal Coverage
Start Date: 1992-01-01


Location Keywords
GEOGRAPHIC REGION > GLOBAL


Data Resolution
Temporal Resolution: 1 Week


Science Keywords
SOLID EARTH >GRAVITY/GRAVITATIONAL FIELD >CRUSTAL MOTION    [Definition]
SOLID EARTH >GEODETICS >GEOID CHARACTERISTICS    [Definition]
SOLID EARTH >GRAVITY/GRAVITATIONAL FIELD >CRUSTAL MOTION >OCEAN CRUST DEFORMATION    [Definition]
SOLID EARTH >GEODETICS >COORDINATE REFERENCE SYSTEM    [Definition]
SOLID EARTH >GRAVITY/GRAVITATIONAL FIELD >SATELLITE ORBITS/REVOLUTION    [Definition]
SOLID EARTH >TECTONICS >PLATE TECTONICS    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION
LOCATION


Platform
GPS >Global Positioning System Satellites    [Information]
GLONASS >(GLObal NAvigation Satellite System)    [Information]


Instrument
GNSS RECEIVER    [Information]


Project
EOSDIS >Earth Observing System Data Information System    [Information]
IGS >International GNSS Service    [Information]


Quality
The accuracy of the IGS orbits by temporal resolution of product:
Ultra-rapid (sub-daily) orbit: <5 cm (3 hour delivery delay)
Rapid (daily): <5 cm (24 hour delivery delay)
Final (weekly): <5 cm (13 day delivery delay)


Use Constraints
Cite the IGS: J.M. Dow, R.E. Neilan, G. Gendt, "The International GPS Service (IGS): Celebrating the 10th Anniversary and Looking to the Next Decade," Adv. Space Res. 36 vol. 36, no. 3, pp. 320-326, 2005. doi:10.1016/j.asr.2005.05.125.


Keywords
SATELLITE ORBITS
REFERENCE FRAME


Data Set Progress
IN WORK


Originating Center
CDDIS


Data Center
Crustal Dynamics Data Information System, Solar System Exploration Division, Goddard Space Flight Center, NASA    [Information]
Data Center URL: http://cddis.gsfc.nasa.gov/

Data Center Personnel
Name: CAREY NOLL
Phone: 301-614-6542
Fax: 301-614-6015
Email: Carey.E.Noll at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 690
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA



Distribution
Distribution_Media: On-line
Distribution_Size: <1 Mb/orbit/day
Distribution_Format: On-line
Fees: None


Personnel
CAREY NOLL
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: 301-614-6542
Fax: 301-614-6015
Email: Carey.E.Noll at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Code 690
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


Publications/References
J.M. Dow, R.E. Neilan, G. Gendt, "The International GPS Service (IGS): Celebrating the 10th Anniversary and Looking to the Next Decade," Adv. Space Res. 36 vol. 36, no. 3, pp. 320-326, 2005. doi:10.1016/j.asr.2005.05.125

Creation and Review Dates
DIF Creation Date: 2009-02-05
Last DIF Revision Date: 2009-02-06

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