High-rate SBAS broadcast ephemeris data

doi: 10.5067/GNSS/gnss_highrate_h_001

Data Center Citation
Data Citation
Summary
Description
Data Access
Documentation

Data Center Citation

Noll, Carey E., The Crustal Dynamics Data Information System: A resource to support scientific analysis using space geodesy, Advances in Space Research, Volume 45, Issue 12, 15 June 2010, Pages 1421-1440, ISSN 0273-1177, http://dx.doi.org/10.1016/j.asr.2010.01.018.

Data Citation

International GNSS Service, High-rate SBAS broadcast ephemeris data, Greenbelt, MD, USA: NASA Crustal Dynamics Data Information System (CDDIS), Accessed [[enter user data access date]] at doi:10.5067/GNSS/gnss_highrate_h_001.

Other standard citation formats may be used for this data set and can be found at the DOI Citation Formatter website.

More information about CDDIS data citations and acknowledgments is available.

Summary

Name: High-rate SBAS broadcast ephemeris data
Format: RINEX V2, UNIX compressed ASCII
Spatial Coverage: 90.0N to -90.0S, 180.0E to -180.0W
Temporal Coverage: 2001-05-01 to present
Temporal Resolution:15 minutes
File Size: 250 Kbytes/15-minute file
Platforms: Multiple GNSS

Description

The GNSS receivers collect the signals from orbiting satellites to determine their location in three dimensions and calculate precise time. GNSS receivers detect, decode, and process both pseudorange (code) and phase transmitted by the GNSS satellites. The satellites transmit the ranging codes on two or more 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. The receivers also calculate current local time to high precision facilitating time synchronization applications.

This dataset consists of ground-based Global Navigation Satellite System (GNSS) Satellite-Based Augmentation System (SBAS) Broadcast Ephemeris Data (sub-hourly files) from the NASA Crustal Dynamics Data Information System (CDDIS). GNSS satellites provide autonomous geo-spatial positioning with global coverage. GNSS data sets from ground receivers at the CDDIS consist primarily of the data from the U.S. Global Positioning System (GPS) and the Russian GLONASS. Since 2011, the CDDIS GNSS archive includes data from other GNSS (Europe’s Galileo, China’s Beidou, Japan’s Quasi-Zenith Satellite System/QZSS, the Indian Regional Navigation Satellite System/IRNSS, and worldwide Satellite Based Augmentation Systems/SBASs), which are similar to the U.S. GPS in terms of the satellite constellation, orbits, and signal structure. The sub-hourly SBAS broadcast ephemeris files contain 15 minutes of SBAS broadcast navigation data in RINEX format from a global permanent network of ground-based receivers, one file per 15 minutes per site.

Data Access

The high-rate GNSS SBAS broadcast ephemeris data are online:

https://cddis.nasa.gov/archive/gnss/data/data/highrate/

in subdirectories by year and day of year as follows:

YYYY/DDD/YYh/HH/XXXXMRCCC_K_YYYYDDDHHMM_15M_01S_SN.rnx.gz

as described in the table below.

Code	Meaning
YYYY	4-digit year
DDD	3-digit day of year
YY	2-digit year
HH	2-digit hour
XXXX	4-character IGS station name
M	monument or marker number (0-9)
R	receiver number (0-9)
CCC	ISO country code
K	Data source: R = From Receiver data using vendor or other software S = From data Stream (RTCM or other) U = Unknown
MM	2-digit minute
.gz	Compressed file

Documentation

http://cddis.nasa.gov/Data_and_Derived_Products/GNSS/high-rate_data.html