University of Miami GPS Volcano Monitoring Data on Surface Deformation: Available via Internet

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Unknown

Publication_Date: Unknown

Title: University of Miami GPS Volcano Monitoring Data on Surface Deformation: Available via Internet

Description:

Abstract:

University of Miami GPS volcano monitoring data on surface deformation: available via Internet GPS volcano monitoring data is available from the University of Miami ftp site: corsica.rsmas.miami.edu in directory /pub Additional information about data holdings, related research and relevant imagery and data are made available at the following URL: "http://www.geodesy.miami.edu/" The following information about the data sets was abstracted from the README file located in the /pub directory of the FTP site: This directory contains "quick-look" GPS results for the permanent station CASA at Mammoth Lakes, California, located near the top of the resurgent dome at the USGS 2 color laser facility. The data begin April 20, 1994. Results were obtained with the GIPSY software developed at JPL. We give absolute as well as relative positions for 3 sites: CASA, Goldstone (id. GOLD) and Quincy (id. QUIN). The reference frame is ITRF92. Distances are given in meters, latitude and longitude in degrees, but all formal errors are in meters. Directory Content : - CASA.XYZ, GOLD.XYZ, QUIN.XYZ : X, Y, Z Coordinates and their errors. - CASA.GC : Geocentric Coordinates, Longitude, Latitude, Radial Height (from the earth's center of mass) and their errors. - QUINCASA.NEV, GOLDCASA.NEV : Relative baseline components (north, east, vertical) of the second site with respect to the first site, plus corresponding errors and their correlations. The first entry after the "+-" is the error; entries to the right of the error are the correlations. - STATION.DIFF : Differences between daily results and official ITRF92 coordinates for selected sites mapped to epoch. This gives an indication of the accuracy of the results. Strategy used in the analysis : - The zenith wet troposphere delay is estimated every 6 minutes and modelled as a random walk stochastic process (Dixon et al., 1991). - Carrier phase cycle ambiguities (biases) are estimated, not fixed. - No fiducial (fixed) sites are used in the analysis. Rather, results are transformed into the ITRF92 reference frame using 6 to 10 collocated sites, following the approach of Heflin et al. (1992) and Blewitt et al. (1992). - Prior to June 1, 1994, IGS precise orbits were used, and 12-15 stations were analyzed daily. - Beginning June 1, 1994, data editing was improved, and an average of 20 stations were included in the analysis; we continued to use IGS precise orbits until June 30, 1994. - Beginning July 1, 1994, satellite orbits are estimated simultaneously with station positions to facilitate production of near real-time results, and the number of stations included in the daily analysis increased to an average of 25. - Prior to January 31, 1995, only phase data are used (no P-code) due to Anti-Spoofing (A/S). We began to use P-code from Feb. 1, 1995, and changed to use P-code observations just from some sites with good quality on Feb. 24, 1995. - On Feb. 1, 1995 the elevation cutoff angle of observations changed from 20 degrees to 15 degrees. - From March 3, 1995, corrections of antenna phase center variations are included in our analysis.

Purpose:

Not Available

Supplemental_Information:

REFERENCE: Bock, Y., Continuous monitoring of crustal deformation, GPS World, 40-47, June, 1991.

Supplemental_Information:

REFERENCE: Dixon, T. H., et al., 1995, GPS Monitoring Data for Active Volcanoes Available on Internet, EOS: Transactions of the American Geophysical Union 76, page 2.

Supplemental_Information:

REFERENCE: Dixon, T.H., M. Bursik, S. Kornreich Wolf, M. Heflin, F. Webb, F. Farina, S. Robaudo, Constraints on deformation of the resurgent dome, Long Valley caldera, California from space geodesy, in Space Geodesy and Geodynamics, D. Smith and D. Turcotte, eds., American Geophysical Union Geodynamics Series v. 23, 193-214, 1993.

Supplemental_Information:

REFERENCE: Dixon, T. et al., 1991, First epoch geodetic measurements with the Global Positioning System across the northern Caribbean plate boundary zone, J. Geophys. Res., 96, 2397-2415.

Supplemental_Information:

REFERENCE: Hill, D.P., R.A. Bailey and A. S. Ryall, Active tectonic and magmatic processes beneath Long Valley caldera, eastern California: an overview, J. Geophys. Res., 90, 11,111-11,120, 1985.

Supplemental_Information:

REFERENCE: Langbein, J.O., D.P. Hill, T.N. Parker, S.K. Wilkinson, An episode of re-inflation of the Long Valley Caldera, eastern California; 1989-1991, J. Geophys. Res., 98, 15,851-15,870, 1993.

Supplemental_Information:

REFERENCE: Romanowicz, B., D. Neuhauser, B. Bogaert and D. Oppenheimer, Accessing northern California earthquake data via Internet, EOS: Trans. Am. Geophys. U., 75, 257-259, 1994.

Supplemental_Information:

REFERENCE: Webb, F., M. Bursik, T. Dixon, R. Stein, G. Marshall, Deformation at Long Valley from one year of continuous GPS measurements, Geophys. Res. Lett. (In Press, 1994).

Supplemental_Information:

REFERENCE: Yamashita, K.M., J Kleinman, E. Iwatsubo, J. Ewart, D. Dzurisin, J. Rundle, R. Stein, Results of 1992 leveling survey at Long Valley caldera, California, EOS: Trans. Am. Geophys. U., 73, 347, 1992.

Supplemental_Information:

REFERENCE: Zumberge, J.F., R. Liu, R. Neilan, The International GPS Service for Geodynamics, Central Bureau Information System, EOS: Trans. Am. Geophys. U., 75, 103, 1994.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19940401

Ending_Date: Unknown

Currentness_Reference:Unknown

Status:

Progress: Complete

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -119.0

East_Bounding_Coordinate: -118.0

North_Bounding_Coordinate: 38.0

South_Bounding_Coordinate: 37.0

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: GCMD INSTRUMENT

Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > CRUSTAL MOTION

Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > SATELLITE ORBITS/REVOLUTION

Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOTHERMAL DYNAMICS > GEOTHERMAL ENERGY

Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > STRAIN

Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > STRESS

Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > LITHOSPHERIC PLATE MOTION > CRUSTAL DEFORMATION

Theme_Keyword: GPS > GLOBAL POSITIONING SYSTEM

Theme_Keyword: Active

Theme_Keyword: Casa

Theme_Keyword: Geodsey

Theme_Keyword: Gps

Theme_Keyword: Idn_node Gsfc/umiami

Theme_Keyword: Internet

Theme_Keyword: Krakatau

Theme_Keyword: Long Valley Caldera

Theme_Keyword: Mojave

Theme_Keyword: Rsmas

Theme_Keyword: Surface Strain

Theme_Keyword: Volcano

Theme_Keyword: GEOSCIENTIFIC INFORMATION

Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: SOLID EARTH > CRUST

Place_Keyword: CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA > MAMMOTH LAKES

Access_Constraints: Not Available

Use_Constraints:

Not Available

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: JACQUELINE E. DIXON

Contact_Position: TECHNICAL CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: University of Miami (RSMAS)

Address: 4600 Rickenbacker Causeway

City: Miami

State_or_Province: FL

Postal_Code: 33149

Country: USA

Contact_Facsimile_Telephone: 305 361 4632

Contact_Electronic_Mail_Address: jdixon@rsmas.miami.edu

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Not Available

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U-MIAMI/RSMAS/MGGD/GEOD-L > Geodesy Laboratory, Marine Geology and Geophysics Division, Rosenstiel School of Marine and Atmospheric Science, University of Miami

Contact_Person: TIMOTHY H. DIXON

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: University of Miami (RSMAS)

Address: 4600 Rickenbacker Causeway

City: Miami

State_or_Province: FL

Postal_Code: 33149

Country: USA

Contact_Voice_Telephone: 305 361 4660

Contact_Facsimile_Telephone: 305 361 4632

Contact_Electronic_Mail_Address: tim@corsica.rsmas.miami.edu

Resource_Description: UMIAMI_GPS_VOLCANO

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.geodesy.miami.edu/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://www.geodesy.miami.edu/volcano_monitoring.ht...

Access_Instructions:

Volcano Monitoring and Deformation research page.

Fees: Not Available

Metadata_Reference_Information:

Metadata_Date: 20000914

Metadata_Review_Date: 20061016

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: GENE R. MAJOR

Contact_Position: DIF AUTHOR

Contact_Address:

Address_Type: Mailing and Physical Address

Contact_Electronic_Mail_Address: gsfc-gcmduso@mail.nasa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time