gps_survey_utm

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: U. S. Geological Survey Volcano Hazards Team

Publication_Date: Unknown

Title: gps_survey_utm

Geospatial_Data_Presentation_Form: vector digital data

Online_Linkage:

https://pubs.usgs.gov/dds/dds-81/

Description:

Abstract:

The USGS occupied 31 stations in the Long Valley area each summer from 1992 to 1994, and again in 1996, 1998 and 1999. The stations were occupied for a period of 5 days during July or August. The USGS recorded dual-frequency carrier-phase and C/A-code pseudorange data at 30s intervals for at least six hours at each site. Up to seven receivers were deployed each day. At least one local station, usually CASA, was observed every day to provide a tie between stations occupied on different days. Relative station position were computed using the GIPSY software. Integer-ambiguity, ionosphere-free, improved-orbit solution solution were computed in the ITRF global reference frame by including simultaneous data from several tracking stations within North America.

Continuous GPS measurements at Long Valley caldera have been made since early 1993 (for more information go to <http://quake.wr.usgs.gov/research/deformation/twocolor/lv_continuous_gps.html>) . Seventeen GPS receivers are now operating within and near the Long Valley. The data are processed using the GIPSY software with point positioning. Prior to plotting, "bad" measurements of position, those that deviate significantly relative to position measurements made within a 3 month window, are identified and removed. Measurement precisions (1 St Dev) for "absolute" position coordinates, i.e. relative to a global reference frame, are 3-4 mm (north), 5-6 mm (east), and 10-12 mm (vertical) using 24 hour solutions. Corresponding velocities uncertainties for a 12 months period are about 2 mm/yr in the horizontal components and 3-4 mm/yr in the vertical component.

References M. Battaglia, P. Segall, J. Murray, P. Cervelli, J. Langbein, 2002. The mechanics of unrest at Long Valley caldera, California: 1. Modeling the geometry of the source using GPS, leveling and 2-color EDM data. J Volcanol. Geotherm. Res. (in press).

Dixon, T.H., Mao, A., Bursik, M.I., Heflin, M.B., Langbein, J., Stein, R.S., and Webb, F.H., 1997, Continuous monitoring of surface deformation at Long Valley Caldera, California, with GPS: Journal of Geophysical Research, v. 102, no. B6, p. 12,017-12,034.

Marshall, G.A., Langbein, J., Stein, R.S., Lisowski, M., and Svarc, J., 1997, Inflation of Long Valley caldera, California, Basin and Range strain, and possible Mono Craters' dike opening from 1990 to 1994 GPS surveys: Geophysical Research Letters, v. 24, no. 9, p. 1003-1006.

Purpose:

To provide a portable compilation of volcanic monitoring data from the Long Valley Volcano Observatory.

Supplemental_Information:

This metadata is for the survey GPS data projected to UTM. Real-time data of the current activity of the caldera (including earthquakes, ground deformation, release of volcanic gas), information about volcanic hazards and the USGS response plan are available online at the Long Valley observatory web page (<http://lvo.wr.usgs.gov> ).

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: unknown

Currentness_Reference: publication date

Status:

Progress: In work

Maintenance_and_Update_Frequency: Continually

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -120.386040

East_Bounding_Coordinate: -118.643282

North_Bounding_Coordinate: 38.071212

South_Bounding_Coordinate: 37.145186

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Volcano monitoring data

Theme_Keyword: Geology

Theme_Keyword: Mono-Inyo Craters Volcanic Chain

Theme_Keyword: Long Valley Caldera

Theme_Keyword: Volcano

Theme_Keyword: Volcanic Chain

Theme_Keyword: Caldera

Theme_Keyword: Crater

Theme_Keyword: Mono Lake

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: United States of America

Place_Keyword: Long Valley Caldera

Place_Keyword: Mono Lake

Place_Keyword: Mono-Inyo Craters

Access_Constraints: None

Use_Constraints:

None. Acknowlegdement of the U.S. Geological Survey would be appreciated in products derived from these data.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Organization: U. S. Geological Survey

Contact_Position: Scientist-in-charge

Contact_Address:

Address_Type: mailing and physical address

Address: 345 Middlefield Road, MS 910

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025

Country: USA

Contact_Voice_Telephone: 650.329.4795

Contact_Facsimile_Telephone: 650.329.5203

Contact_Electronic_Mail_Address: sic_lvo@usgs.gov

Hours_of_Service: Irregular. M-F 10 AM to 4 PM

Contact_Instructions: email is the preferred contact

Security_Information:

Security_Classification_System: None

Security_Classification: Unclassified

Security_Handling_Description: None

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 3; ESRI ArcCatalog 8.2.0.700

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: See Entity_Attribute_Information

Quantitative_Attribute_Accuracy_Assessment:

Attribute_Accuracy_Value: See Attribute_Accuracy_Explanation

Attribute_Accuracy_Explanation:

Attribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section.

Completeness_Report:

The report is intended to describe completely the monitoring data available at the time of completion of this file.

Lineage:

Process_Step:

Process_Description: Dataset copied.

Process_Step:

Process_Description: Dataset moved.

Source_Used_Citation_Abbreviation:

C:\LVO\NewLVO_GIS\Monitoring_Data\Geodetic\GPS\Dina\UTM\gps_continuous_UTM

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\xml3E.tmp

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\xml52.tmp

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\xml53.tmp

Process_Step:

Process_Description: Metadata imported.

Source_Used_Citation_Abbreviation: C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\xml5A.tmp

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point

Point_and_Vector_Object_Count: 69

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 11

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600

Longitude_of_Central_Meridian: -117.000000

Latitude_of_Projection_Origin: 0.000000

False_Easting: 500000.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000256

Ordinate_Resolution: 0.000256

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927

Ellipsoid_Name: Clarke 1866

Semi-major_Axis: 6378206.400000

Denominator_of_Flattening_Ratio: 294.978698

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: gps_survey_utm

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: ESRI

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: AREA

Attribute:

Attribute_Label: PERIMETER

Attribute:

Attribute_Label: GPS_2_

Attribute:

Attribute_Label: GPS_2_ID

Attribute:

Attribute_Label: GPSS_SIT_I

Attribute_Definition: An autonumber ID

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: SITE_NAME

Attribute_Definition: The name of the site where the data was collected

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: LON_DDEG

Attribute_Definition: Longitude in decimal degrees

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: LON_DEG

Attribute_Definition: The longitude in degrees

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: LON_MIN

Attribute_Definition: The longitude in minutes

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: LON_SEC

Attribute_Definition: The longitude in seconds

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: LAT_DDEG

Attribute_Definition: The latitude in decimal degrees

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: LAT_DEG

Attribute_Definition: The latitude in degrees

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: LAT_MIN

Attribute_Definition: The latitude in minutes

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: LAT_SEC

Attribute_Definition: The latitude in seconds

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: HEIGHT

Attribute_Definition: The measured elevation in meters

Attribute_Definition_Source: Author

Attribute:

Attribute_Label: X_COORD

Attribute_Definition: The longitude in UTM

Attribute_Definition_Source: author

Attribute:

Attribute_Label: Y_COORD

Attribute_Definition: The latitude in UTM

Attribute_Definition_Source: author

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: USGS Information Services

Contact_Address:

Address_Type: mailing address

Address: Box 25286

Address: Denver Federal Center

City: Denver

State_or_Province: CO

Postal_Code: 80225-0046

Country: USA

Contact_Voice_Telephone: (303) 202-4200

Contact_Voice_Telephone: 1-888-ASK-USGS

Contact_Facsimile_Telephone: (303) 202-4695

Contact_Electronic_Mail_Address: infoservices@usgs.gov

Resource_Description: USGS Geologic Investigation Series # title (downloadable data)

Distribution_Liability:

This database, identified as DDS-#, has been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size: 22.216

Fees: No fees for digital files

Metadata_Reference_Information:

Metadata_Date: 20030317

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Dina Venezky

Contact_Organization: USGS Volcano Hazards Team

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing address

Address: 345 Middlefield Road MS 910

City: Menlo Park

State_or_Province: CA

Postal_Code: 94025

Country: USA

Contact_Voice_Telephone:

REQUIRED: The telephone number by which individuals can speak to the organization or individual.

Contact_Electronic_Mail_Address: sic_lvo@usgs.gov

Contact_Instructions: Please contact the LVO SIC by email.

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Security_Information:

Metadata_Security_Classification_System: None

Metadata_Security_Classification: Unclassified

Metadata_Security_Handling_Description: None

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile