Chirp seismic shotpoint navigation every 500 shots in geographic coordinates - Lake Mohave survey 2002

Metadata also available as - [Questions & Answers] - [Parseable text]

Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: David S. Foster
Originator: VeeAnn A. Cross
Publication_Date: 2005
Title:
Chirp seismic shotpoint navigation every 500 shots in geographic coordinates - Lake Mohave survey 2002
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: <http://pubs.usgs.gov/of/2004/1247/data/nav/seis500sht.zip>
Larger_Work_Citation:
Citation_Information:
Originator: VeeAnn A. Cross
Originator: David S. Foster
Originator: David C. Twichell
Publication_Date: 2005
Title: Lake Mohave Geophysical Survey 2002: GIS Data Release
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2004-1247
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey
Online_Linkage: <http://pubs.usgs.gov/of/2004/1247>
Description:
Abstract:
Lake Mohave is one of several multi-purpose reservoirs that have been constructed on the Colorado River. The lake was formed upon completion of the Davis Dam in 1953. No mapping of the floor of the lake had been conducted since completion of the Davis Dam. The U.S. Geological Survey, in cooperation with researchers form the University of Nevada Las Vegas, completed a geophysical survey of this lake in April 2002. The survey included collection of sidescan sonar imagery of nearly the entire lake floor, and high-resolution seismic-reflection profiles along widely spaced lines throughout the lake. The detailed mapping of the lake floor was used to determine the amount of sediment that had accumulated in the lake since impoundment, its distribution, and the processes of deposition.
Purpose:
This shapefile is used to enable correlation between seismic-reflection profiles and the sidescan-sonar imagery, geologic interpretation, and other features represented on the lake floor.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20020418
Ending_Date: 20020428
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -114.711300
East_Bounding_Coordinate: -114.571067
North_Bounding_Coordinate: 35.868300
South_Bounding_Coordinate: 35.200633
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: chirp
Theme_Keyword: CMGP
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: Knudsen
Theme_Keyword: lake
Theme_Keyword: navigation
Theme_Keyword: OF 2004-1247
Theme_Keyword: Open-File Report
Theme_Keyword: point
Theme_Keyword: reservoir
Theme_Keyword: seismic
Theme_Keyword: seismic-reflection
Theme_Keyword: shapefile
Theme_Keyword: shotpoint
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Woods Hole Science Center
Theme_Keyword: field activity identifier H-1-02-SW
Theme_Keyword: field activity serial number 02020
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Arizona
Place_Keyword: Colorado River
Place_Keyword: Davis Dam
Place_Keyword: Hoover Dam
Place_Keyword: Lake Mohave
Place_Keyword: Las Vegas
Place_Keyword: Mojave Desert
Place_Keyword: Nelson's Landing
Place_Keyword: Nevada
Place_Keyword: North America
Place_Keyword: United States
Access_Constraints: None.
Use_Constraints:
The U.S. Geological Survey must be referenced as the originator of the dataset in any future products or research derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David S. Foster
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2271
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dfoster@usgs.gov
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 8.2.0.700
Data_Quality_Information:
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 10 m
Horizontal_Positional_Accuracy_Explanation:
Navigation data were collected with a PLGR system. The nominal accuracy of the system is thought to be 10m. Since the Knudsen system is a sidemount rather than towed system, this accuracy is not diminished.
Lineage:
Process_Step:
Process_Description:
This particular seismic data was acquired with a Knudsen chirp subbottom system with the data stored digitally on a laptop computer running the Knudsen system software. The navigation is stored in a separate file from the seismic SEG-Y data.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David S. Foster
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2271
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dfoster@usgs.gov
Process_Step:
Process_Description:
The Knudsen system does not necessarily start each seismic file with shot 1. Since the SEG-Y data files were being processed so that each file started with shot 1, these navigation files needed to have the same correction. This way the shotpoint navigation will correspond to the plotted SEG-Y data.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David S. Foster
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2271
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dfoster@usgs.gov
Process_Step:
Process_Description:
The shot point navigation for each line of seismic data was combined into a single file and then run through an AWK script which kept the first and last point of each line, and every shotpoint evenly divisible by 500.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
The files were edited such that the day and julian day accurately represented the UTC timing of these events. In some cases, when the navigation system acquires data past midnight, the day and julian day were not updated.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
These points were then imported into ArcView and saved as a shapefile.
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: 1213
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.0001
Longitude_Resolution: 0.0001
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: seis500sht
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: LONGITUDE
Attribute_Definition: Longitude fix of the data point.
Attribute_Definition_Source: Software acquired.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -114.711300
Range_Domain_Maximum: -114.571067
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: LATITUDE
Attribute_Definition: Latitude fix for the data point.
Attribute_Definition_Source: Software acquired.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 35.200633
Range_Domain_Maximum: 35.868300
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: LINENUM
Attribute_Definition:
Seismic trackline number along which the shotpoing was acquired.
Attribute_Definition_Source: Software generated.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 60
Attribute:
Attribute_Label: SHOT
Attribute_Definition: Seismic shot point number at the data acquisition location.
Attribute_Definition_Source: Software generated.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 30353
Attribute:
Attribute_Label: MONTH
Attribute_Definition: Month the data were acquired (referenced to UTC time).
Attribute_Definition_Source: Scientist.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 4
Enumerated_Domain_Value_Definition: Indicates April.
Attribute:
Attribute_Label: DAY
Attribute_Definition: Day the data were acquired (referenced to UTC time).
Attribute_Definition_Source: Scientist.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 18
Range_Domain_Maximum: 28
Attribute:
Attribute_Label: YEAR
Attribute_Definition: Year the data were acquired.
Attribute_Definition_Source: Scientist.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 2002
Enumerated_Domain_Value_Definition: Year.
Attribute:
Attribute_Label: JDAY
Attribute_Definition: Julian day the data were acquired (referenced to UTC time).
Attribute_Definition_Source: Scientist.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 108
Range_Domain_Maximum: 118
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David S. Foster
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2271
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: dfoster@usgs.gov
Resource_Description: Downloadable Data
Distribution_Liability:
These data were prepared by an agency of the United States Government. Neither the United States government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or any agency thereof. Although all data published in this publication have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials.
Metadata_Reference_Information:
Metadata_Date: 20040629
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.7.3 on Tue Jun 29 15:24:43 2004