Metadata Updated: March 23, 2019

Very Long Baseline Interferometry (VLBI) is a geometric technique: it measures the time difference between the arrival at two Earth-based antennas of a radio wavefront emitted by a distant quasar. VLBI precisely locates points on Earth by comparing radio signals from a quasar radio source located in deep space received at different times at different Earth ground stations. This method gives relative positions of the Earth stations. VLBI data can be used to calculate information on Earth rotation, length of day, polar motion, baseline and velocities of stations. Products generated by VLBI contribute to research in many areas, including solid Earth, tides, studies of the vertical, fundamental astronomy, and VLBI technique improvement.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date August 1, 2018
Metadata Updated Date March 23, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date March 23, 2019
Publisher CDDIS
Unique Identifier C1000000043-CDDIS
Carey Noll
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation Archived by National Aeronautics and Space Administration, U.S. Government, CDDIS.
Datagov Dedupe Retained 20190322235447
Harvest Object Id 83b0baf1-ba0f-4e60-8f21-e50f257f6d2c
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 1982-01-01
Homepage URL
Language en-US
Metadata Type geospatial
Data Last Modified 2012-06-14
Program Code 026:001
Source Datajson Identifier True
Source Hash fb5fb956aaf9d697ac0b0dca6300bd7488736d04
Source Schema Version 1.1
Spatial -180.0 -90.0 180.0 90.0
Temporal 1979-08-03T00:00:00Z/2019-02-25T00:00:00Z
Category IVS, geospatial

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