gps_survey_utm

Metadata also available as

Metadata:


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

Generated by mp version 2.7.3 on Mon Mar 17 17:49:51 2003