CDDIS_VLBI_data
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.
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| bureauCode |
[
"026:00"
]
|
| contactPoint |
{
"fn": "LTA REPRESENTATIVE USGS EROS CENTER",
"@type": "vcard:Contact",
"hasEmail": "mailto:lta@usgs.gov"
}
|
| description | 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. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Download this dataset",
"format": "HTML",
"mediaType": "text/html",
"description": "Query and order satellite images, aerial photographs, and cartographic products through the U.S. Geological Survey. Log in as a guest or as a registered user. Registered users have access to more features than guests do. If you plan on using EarthExplorer frequently, you may wish to register. Please note that this site uses Session Cookies and Java applets.",
"downloadURL": "http://earthexplorer.usgs.gov"
}
]
|
| identifier | C1000000043-CDDIS |
| issued | 1982-01-01 |
| keyword |
[
"nasa"
]
|
| landingPage | https://cmr.earthdata.nasa.gov:443/search/concepts/C1000000043-CDDIS.html |
| language |
[
"en-US"
]
|
| modified | 2025-04-01 |
| programCode |
[
"026:001"
]
|
| publisher |
{
"name": "NASA/GSFC/SED/ESD/GGL/CDDIS",
"@type": "org:Organization"
}
|
| spatial | -180.0 -90.0 180.0 90.0 |
| temporal | 1979-08-03T00:00:00Z/2022-01-17T00:00:00Z |
| theme |
[
"IVS",
"geospatial"
]
|
| title | CDDIS_VLBI_data |
