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NASA’s Crustal Dynamics Data Information System (CDDIS) provides an archive of regional experiment data, previously funded by NASA and international cooperative programs. Starting in 1990, studies in the geophysical integrity of NASA's Satellite Laser Ranging (SLR) and Very Long Baseline Interferometry (VLBI) sites were undertaken utilizing Global Positioning System (GPS). Small networks of GPS sites were selected in an approximate 10-20 km radius around the main observing monuments at several of key sites. The measurements taken at these "footprint" sites allow analysts to estimate the local tectonic stability of the area they encompass, assuring the integrity of the space geodetic measurements taken at these critical sites. In addition to the surrounding footprint sites, measurements are taken at the reference monuments placed at a distance of 50 to 100 meters to the main marker. GPS measurements at the reference monuments allow analysts to continue to monitor the physical stability of the main observing monuments and provide additional data for the estimation of the regional tectonic stability of the area.

Summary of CDDIS GNSS Experiment Data Holdings

  • Spatial and temporal coverage information (see table below)
  • Data Volume: ~50 Mbytes/experiment
  • Data Format: Typically Receiver INdependent EXchange (RINEX) format; some raw receiver data also available
Experiment Name
Dates
Start
End
Alaska - GSFC
08-Jun-93
25-Jun-93
Alaska - Lamont
29-Jun-93
25-Jul-93
Alaska - USGS
06-Jun-93
23-Jun-93
Alaska Network 1990 -- 0
11-Jul-90
14-Jul-90
Alaska Network 1990 -- 1
17-Jul-90
20-Jul-90
Alaska Network 1990 -- 2
21-Jul-90
24-Jul-90
Alaska Network 1990 -- 3
26-Jul-90
28-Jul-90
Alaska Network 1990 -- 4
29-Jul-90
05-Aug-90
Alaska Network 1990 -- 5
10-Aug-90
18-Aug-90
Alaska Network 1991 - 332
04-Aug-91
19-Aug-91
Alaska Network 1991 - 334
04-Aug-91
19-Aug-91
Arequipa Footprint
18-Feb-94
23-Feb-94
Baja 93
05-Apr-93
19-Apr-93
California Experiment 13
21-Mar-89
24-Mar-89
California Experiment 14
28-Mar-89
31-Mar-89
California Experiment 15
01-Apr-89
03-Apr-89
California Experiment 16
04-Apr-89
07-Apr-89
California Experiment 17
25-Mar-90
28-Mar-90
California Experiment 18
29-Mar-90
01-Apr-90
California Experiment 20
07-Feb-91
10-Feb-91
Chile Survey Tie 1990
20-May-90
22-May-90
CIGNET
03-Jun-90
11-Aug-90
Easter Island Footprint
26-Apr-93
01-May-93
Fairbanks Footprint
03-Sep-91
10-Sep-91
Fort Davis Footprint
07-Jun-90
19-Jun-90
Fort Davis Footprint 2
17-May-92
21-May-92
Fort Ord Footprint
02-Jul-91
17-Jul-91
Fort Ord Survey Tie 1988
25-May-88
28-May-88
Geomex 1989
29-Apr-89
12-May-89
GIG '91 -- April 1, 1991
22-Jan-91
13-Feb-91
Goldstone Footprint
08-Jun-92
10-Jun-92
GORF Footprint
03-Oct-90
19-Oct-90
GORF Footprint 2
03-Oct-92
19-Oct-92
Hat Creek Footprint
11-Nov-90
21-Nov-90
Kokee Park Footprint
09-Aug-93
15-Aug-93
Mammoth Experiment
15-Sep-92
18-Sep-92
Maui Footprint
19-Aug-93
23-Aug-93
Mojave 93
02-Mar-93
06-Mar-93
Mojave Experiment
18-Aug-92
22-Aug-92
Mojave/Mammoth 93
06-Aug-93
25-Aug-93
Monument Peak Footprint
09-May-92
17-May-92
Monument Peak Footprint 2
15-Jun-94
22-Jun-94
Parkfield Experiment 92
01-Jun-92
06-Jun-92
Parkfield Experiment 93
10-May-93
12-May-93
Pinyon Flat Survey 1986
03-Jun-86
06-Jun-86
Pinyon Flats Footprint
23-May-92
01-Jun-92
Presidio Footprint
18-Jun-91
28-Jun-91
Quincy Footprint
02-Nov-90
08-Nov-90
Santiago Footprint
09-May-93
14-May-93
Simeiz Survey 1991
01-Jan-91
12-Feb-91
Sourdough Footprint
15-Aug-91
28-Aug-91
Vandenberg Footprint
03-Jun-91
12-Jun-91
Ventura 93
02-Nov-93
10-Nov-93
White Wolf 93
26-Jul-93
01-Aug-93