Airborne geophysical survey: Susitna 2012

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2013
Title: Airborne geophysical survey: Susitna 2012
Online_Linkage: https://mrdata.usgs.gov/magnetic/show-survey.php?id=AK_10001
Larger_Work_Citation:
Citation_Information:
Originator: Saltus, R.W.
Originator: Anderson, E.D.
Originator: New-Sense Geophysics Limited
Publication_Date: 1999
Title: Alaska digital aeromagnetic database description
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 99-503
Online_Linkage: http://pubs.usgs.gov/of/1999/ofr-99-0503/
Description:
Abstract:
A high sensitivity fixed-wing magnetic airborne survey was carried out for U.S. Geological Survey (Client) from Skwentna Roadhouse, AK, USA, over the survey blocks known as: Sustina (A1), and Add-On. New-Sense Geophysics Ltd. (NSG) flew the survey under the terms of an agreement with Client dated September 7th, 2012. The survey was flown between October 11th and November 1st, 2012. A total of 10,827* line kilometers of field magnetic data were flown, collected, processed and plotted. Sustina (A1) Block: 7,700 km; Add-On Block: 3,127 km. The primary geophysical sensor was a high-sensitivity Cesium-3 magnetometer, mounted in a fixed tail stinger assembly. Airborne ancillary equipment included; iCAM (digital video recorder), iDAS data acquisition system, fluxgate magnetometer, radar altimeter, and global positioning system (GPS) receiver. The GPS system provided accurate real-time navigation and subsequent flight path recovery. Ground equipment included; high-sensitivity Cesium-3 magnetometer, iBASE data acquisition system, global positioning system (GPS) receiver, and PC-based field workstation. The GPS receiver was used for time synchronization with airborne data. The field computer was used to check the data quality and completeness on a daily basis.
Purpose:
The technical objective of the survey was to provide high-resolution total field magnetic maps suitable for anomaly delineation, detailed structural evaluation, and identification of lithologic trends. Fully corrected magnetic maps were prepared by New-Sense Geophysics Limited, in their Toronto office, after the completion of survey activities.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 201210
Ending_Date: 201211
Currentness_Reference: ground condition
Status:
Progress: complete
Maintenance_and_Update_Frequency: none planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -154.070028
East_Bounding_Coordinate: -149.904028
North_Bounding_Coordinate: 62.742167
South_Bounding_Coordinate: 61.843417
Keywords:
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:ce2c5e42-f64e-4b12-ada8-2340dc18b9c5
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geophysics
Theme_Keyword: geospatial datasets
Theme_Keyword: magnetic field (earth)
Theme_Keyword: aeromagnetic surveying
Theme_Keyword: field monitoring stations
Place:
Place_Keyword_Thesaurus: Common Geographic Areas
Place_Keyword: f02050 = Bethel
Place_Keyword: f02170 = Matanuska-Susitna
Place_Keyword: f02290 = Yukon-Koyukuk
Access_Constraints: none
Use_Constraints: none
Browse_Graphic:
Browse_Graphic_File_Name: Browse_Graphic_File_Description:
Reduced-size image depicting the data, 732 x 480 pixels, 99,100 bytes
Browse_Graphic_File_Type: JPEG
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Recent aeromagnetic surveys such as this one have generally been carried out on contract by private-sector companies that specialize in these surveys. In some cases we will retain a report from the contractor detailing methods and survey parameters, which could be consulted in order to understand the likely accuracy of the measurements.
Logical_Consistency_Report:
In general each original survey was collected by a single contractor, who would be responsible for processing the field observations, and reflect industry standard practices and controls. Variation among surveys is possible, especially if they were carried out during very different time periods.
Completeness_Report:
Observations were made along flight lines, so these data may not extend into all parts of the geographic bounding extents.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Detailed positional information is determined by the contractor using navigational controls to specifications given in the contractor reports. Generally these are more precise and accurate for newer surveys than for older ones.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The aircraft vertical position was determined using the navigational positioning equipment on the aircraft, which were radar altimeter and barometric altimeter.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Connard, G.G., Saltus, R.W., Hill, P.L., Carlson, L., Milicevic, B.
Publication_Date: 1999
Title: Alaska digital aeromagnetic database description
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 99-503
Online_Linkage: http://pubs.usgs.gov/of/1999/ofr-99-0503/DBDESC.HTM
Type_of_Source_Media: paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1999
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: paper
Source_Contribution:
Digital information were drawn from (or are presented in) this report
Process_Step:
Process_Description:
Aeromagnetic survey flown by New-Sense Geophysics Limited in the time period 10/11/2012-11/01/2012 direction NW-SE at altitude 100 feet above ground (AG) with spacing between 0.5 and 1 miles for a total of 6728 line miles
Process_Date: 201210 to 201211
Process_Step:
Process_Description:
New-Sense Geophysics Limited was contracted by the U.S. Geological Survey (USGS) to carry out an airborne magnetic survey. These data were collected, processed, and plotted using industry standard techniques. The accompanying contractor's report (FINAL LOGISTICS REPORT-USGS- Sustina Airborne Survey 2012.pdf) provides detailed data processing documentation.
Process_Date: 2012
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey, Mineral Resources Program
Contact_Person: Richard W. Saltus
Contact_Address:
Address_Type: mailing address
Address:
Mail Stop 964 Building 20 Denver Federal Center, West 6th Avenue and Kipling Streets
City: Lakewood
State_or_Province: Colorado
Postal_Code: 80225-0046
Contact_Voice_Telephone: 303-236-1375
Contact_Facsimile_Telephone: 303-236-1425
Contact_Electronic_Mail_Address: saltus@usgs.gov
Process_Step:
Process_Description:
USGS is providing contractor delivered digital data in ASCII format.
Process_Date: 201211
Process_Step:
Process_Description:
Added keywords section with USGS persistent identifier as theme keyword.
Process_Date: 20201110
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
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
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Entity point
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 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
The majority of these surveys are available as digital flightline data (data for which digital records of original flightline data exist). We attempted to recover or construct the standard channels (fields) to be included in the final database for all digital flightline data. For some surveys, some of the standard channels (e.g., MAG_BASE ) were not available and were removed from the individual final database file. The standard channels are: Standard Database Channels For Digital Flightline Surveys
 Channel Name        Units               Description
 LINE                number              Line number
 LINE_DIRECTION      deg.                Line direction
 FLIGHT              number              Flight number
 DATE                Julian date         Date flown (YYYYDDD)
 FIDUCIAL            number              Fiducial count (flight specific)
 TIME                hh:mm:ss.ss         Operating system time
 SYSTEM_CLOCK        milsec              KANA8 (A/D converter) counter
 NAD27_X meters      NAD27               Easting, Z5N, Alaska mainland
 NAD27_Y meters      NAD27               Northing, Z5N, Alaska mainland
 WGS84_X meters      WGS84               Easting, Z5N, World
 WGS84_Y meters      WGS84               Northing, Z5N, World
 LATITUDE_NAD27      degrees             GPS latitude, NAD27, Alaska mainland
 LONGITUDE_NAD27     degrees             GPS longitude, NAD27, Alaska mainland
 GPS_HEIGHT_WGS84    meters              GPS height (orthometric) above MSL, WGS 84, World
 UTC_DAYSEC          decimal seconds     UTC daily second counter (0-86399)
 FLUX_X              volts               Fluxgate x-axis
 FLUX_Y              volts               Fluxgate y-axis
 FLUX_Z              volts               Fluxgate z-axis
 RAD_ALT_m           meters              Radar altimeter, height above ground
 MAG_RAW             nT                  Raw magnetometer data
 MAG_FILT            nT                  Filtered raw magnetometer data
 MAG_COMP            nT                  Compensated magnetometer data
 DIURNAL             nT                  Base station (diurnal) magnetometer data
 MAG_DIURNAL_CORR    nT                  Diurnal corrected magnetometer data
 MAG_HEADING_CORR    nT                  Heading corrected magnetometer data
 MAG_LAG_CORR        nT                  Lag corrected magnetometer data
 MAG_SMPL_LVL        nT                  Conventionally (simple) leveled magnetometer data
 IGRF                nT                  Calculated IGRF, 2010 model
 TMI_FINAL           nT                  Final TMI (IGRF corrected MAG_SMPL_LVL  data)
 VDV nT/m            1st                 Order Vertical Derivative
 TMI_sync            nT                  Synced final TMI to previously flown survey
Entity_and_Attribute_Detail_Citation:
New-Sense Geophysics Limited Report (FINAL LOGISTICS REPORT-USGS- Sustina Airborne Survey 2012.pdf)
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey, Mineral Resources Program
Contact_Person: Peter N. Schweitzer
Contact_Address:
Address_Type: mailing address
Address: Mail Stop 954 USGS National Center, 12201 Sunrise Valley Drive
City: Reston
State_or_Province: Virginia
Postal_Code: 20192
Contact_Voice_Telephone: 703-648-6533
Contact_Facsimile_Telephone: 703-648-6252
Contact_Electronic_Mail_Address: pschweitzer@usgs.gov
Resource_Description: AK_10001.zip
Distribution_Liability:
Reference herein to any specific commercial product, process, or service by trade name,trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: CSV
Format_Version_Number: 1.0
Format_Information_Content:
Flight-line airborne magnetic anomaly measurements, collected in digital form
File_Decompression_Technique: unzip
Transfer_Size: 1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Fees: none
Metadata_Reference_Information:
Metadata_Date: 20201110
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey, Mineral Resources Program
Contact_Person: Peter N. Schweitzer
Contact_Address:
Address_Type: mailing address
Address: Mail Stop 954 USGS National Center, 12201 Sunrise Valley Drive
City: Reston
State_or_Province: Virginia
Postal_Code: 20192
Contact_Voice_Telephone: 703-648-6533
Contact_Facsimile_Telephone: 703-648-6252
Contact_Electronic_Mail_Address: pschweitzer@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

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