doi:10.5067/GNSS/glonass_daily_s_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, Daily 30-second observation summary files (output of TEQC), Greenbelt, MD, USA: NASA Crustal Dynamics Data Information System (CDDIS), Accessed [[enter user data access date]] at doi:10.5067/GNSS/glonass_daily_s_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: Daily 30-second GLONASS observation summary files (output of TEQC)
• Format: RINEX V2, UNIX compressed ASCII
• Spatial Coverage: 90.0 to -90.0, 180.0 to -180.0
• Temporal Coverage: 1992-01-01 to present
• Temporal Resolution: Daily
• File Size: 2.5 Mbytes/site/day
• Platforms: Multiple GNSS

Description

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) GLONASS Observation Summary Data (30-second sampling, daily files of all distinct navigation messages received in one day) from the NASA Crustal Dynamics Data Information System (CDDIS). GNSS provide autonomous geo-spatial positioning with global coverage. The GLONASS data sets from ground receivers at the CDDIS consist of observations from the Russian GLObal NAvigation Satellite System (GLONASS); Russia's GLONASS is similar to the U.S. GPS in terms of the satellite constellation, orbits, and signal structure. The daily files contain summary information of one day of GPS or multi-GNSS observations (30-second sampling) data in RINEX format from a global permanent network of ground-based receivers, one file per site.

Data Access

The daily 30-second GNSS observation summary files (output of TEQC) are online:

in subdirectories by year, day of year, and data type as follows:

YYYY/DDD/YYs/mmmmDDD#.YYs.Z

Code	Meaning
mmmm	4-character site monument name
YYYY	4-digit year
YY	2-digit year
DDD	3-digit day of year
#	sequence number (0, 1, ...) indicating multiple files within a day; typically 0
.Z	UNIX compressed file

Documentation

http://cddis.nasa.gov/Data_and_Derived_Products/GNSS/GNSS_data_and_product_archive.html