Airborne Gravity: NGS' Airborne Gravity Data for AN01 (2009-2010)
National Geodetic Survey
Data Set
(DS)
| ID: 39699
| Published / External
Created: 2017-04-05
|
Last Modified: 2023-10-17
Project (PRJ) | ID: 37222
ID: 39699
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
* » Title | Airborne Gravity: NGS' Airborne Gravity Data for AN01 (2009-2010) |
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Short Name | GRAVD_AN01 |
* Status | Completed |
Creation Date | |
Revision Date | |
• Publication Date | 2015-03-30 |
* » Abstract |
Airborne gravity data for Alaska collected in 2009-2010 over 2 surveys. This data set is part of the Gravity for the Re-definition of the American Vertical Datum (GRAV-D) project initiated by NOAA's National Geodetic Survey to collect and monitor gravity data suitable for the re-definition of the vertical datum for at least the United States and territories. The data is available at http://www.ngs.noaa.gov/GRAV-D/data_an01.shtml in ASCII text format. |
* Purpose |
These data sets were collected and processed by NOAA's National Geodetic Survey (www.ngs.noaa.gov) as part of its GRAV-D effort to modernize the U.S. vertical datum. The purpose of these data is to provide accurate gravity data for geoid modeling for the U.S. and its territories. It was designed to provide medium wavelength gravity information (around 20-400 km) to connect satellite and ground gravity measurements. |
Notes |
1254 |
Other Citation Details | |
• Supplemental Information | |
DOI (Digital Object Identifier) | |
DOI Registration Authority | |
DOI Issue Date |
Keywords
Theme Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > ATMOSPHERE > ALTITUDE > GEOPOTENTIAL HEIGHT |
Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > OCEANS > MARINE GEOPHYSICS > MARINE GRAVITY FIELD |
Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > SOLID EARTH > GEODETICS > GEOID CHARACTERISTICS |
Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD |
ISO 19115 Topic Category | geoscientificInformation |
NASA/GCMD Data Center Keywords | Data Center > Government Agencies-U.S. Federal Agencies > DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce |
NASA/GCMD Data Center Keywords | DOD/USNAVY/NRL/MRY > Naval Research Laboratory, U.S. Navy, U. S. Department of Defense |
NASA/GCMD Platform Keywords | Platform > Aircraft > King Air RC-12 |
NASA/GCMD Platform Keywords | Platform > Aircraft > Turbo Commander |
NOS Data Explorer Topic Category | Geodetic/Global Positioning |
None | airborne gravity |
None | datum |
None | ellipsoid height |
None | geodetic |
None | geoid |
None | geophysical |
None | GEOSS |
None | GGOS |
None | Global Earth Observation System of Systems |
None | Global Geodetic Observing system |
None | gravity |
None | height modernization |
None | National Spatial Reference System |
None | NAVD88 |
None | North American Vertical Datum of 1988 |
None | NSRS |
None | orthometric height |
None | spatial reference |
None | vertical |
Temporal Keywords
Thesaurus | Keyword |
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* Spatial Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA |
Stratum Keywords
Thesaurus | Keyword |
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Instrument Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Instrument Keywords | GPS RECEIVERS > GPS RECEIVERS |
Global Change Master Directory (GCMD) Instrument Keywords | GRAVIMETERS |
Global Change Master Directory (GCMD) Instrument Keywords | IMU > INERTIAL MEASUREMENT UNIT |
Global Change Master Directory (GCMD) Instrument Keywords | LRGM > Lacoste-Romberg Gravity Meter |
Platform Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Platform Keywords | ENVISAT > Environmental Satellite |
Global Change Master Directory (GCMD) Platform Keywords | ERS-1 > European Remote Sensing Satellite-1 |
Global Change Master Directory (GCMD) Platform Keywords | ERS-2 > European Remote Sensing Satellite-2 |
Global Change Master Directory (GCMD) Platform Keywords | GOCE > Gravity Field and Steady-State Ocean Circulation Explorer |
Global Change Master Directory (GCMD) Platform Keywords | GPS > Global Positioning System Satellites |
Global Change Master Directory (GCMD) Platform Keywords | GRACE > Gravity Recovery and Climate Experiment |
Global Change Master Directory (GCMD) Platform Keywords | GROUND-BASED OBSERVATIONS > GROUND-BASED OBSERVATIONS |
Global Change Master Directory (GCMD) Platform Keywords | JASON-1 |
Global Change Master Directory (GCMD) Platform Keywords | OSTM/JASON-2 > Joint Altimetry Satellite Oceanography Network - 2 |
Global Change Master Directory (GCMD) Platform Keywords | TOPEX/POSEIDON > Ocean Topography Experiment |
Physical Location
• » Organization | National Geodetic Survey |
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• » City | Silver Spring |
• » State/Province | MD |
• Country | |
• » Location Description |
Data Set Information
* Data Set Scope Code | Data Set |
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• Data Set Type | |
• Maintenance Frequency | As Needed |
Maintenance Note | |
» Data Presentation Form | Table (digital) |
• Entity Attribute Overview |
The ASCII text file provides a single processed observation per row with the following elements comma separated: year, month, day, hour, minutes, seconds, latitude (dd), longitude (dd), ellipsoid height (m), full field gravity at altitude (mGals), full field EGM08 gravity at altitude (mGal) |
Entity Attribute Detail Citation |
http://www.ngs.noaa.gov/GRAV-D/data_an01.shtml |
Entity Attribute Detail URL | |
Distribution Liability |
While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. |
Data Set Credit |
Support Roles
* » Support Role | Data Steward |
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* » Date Effective From | 2015-03-30 |
Date Effective To | |
Organization | NGS Communications and Outreach Branch |
Email Address | ngs.infocenter@noaa.gov |
Phone | (301) 713-3242 |
Fax | (301) 713-4172 |
Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | Distributor |
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* » Date Effective From | 2015-03-30 |
Date Effective To | |
Organization | NGS Communications and Outreach Branch |
Email Address | ngs.infocenter@noaa.gov |
Phone | (301) 713-3242 |
Fax | (301) 713-4172 |
Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | Metadata Contact |
---|---|
* » Date Effective From | 2015-03-30 |
Date Effective To | |
Organization | NGS Communications and Outreach Branch |
Email Address | ngs.infocenter@noaa.gov |
Phone | (301) 713-3242 |
Fax | (301) 713-4172 |
Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | Point of Contact |
---|---|
* » Date Effective From | 2015-03-30 |
Date Effective To | |
Organization | NGS Communications and Outreach Branch |
Email Address | ngs.infocenter@noaa.gov |
Phone | (301) 713-3242 |
Fax | (301) 713-4172 |
Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | |
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* » Date Effective From | |
Date Effective To | |
* » Contact | |
* Contact Instructions |
* » Support Role | |
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* » Date Effective From | |
Date Effective To | |
* » Contact | |
* Contact Instructions |
* » Support Role | |
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* » Date Effective From | |
Date Effective To | |
* » Contact | |
* Contact Instructions |
Extents
Currentness Reference | Ground Condition |
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Extent Group 1
Extent Description |
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Extent Group 1 / Geographic Area 1
* » W° Bound | -158.7 |
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* » E° Bound | -148.9 |
* » N° Bound | 66.5 |
* » S° Bound | 63.3 |
* » Description |
Extent Group 1 / Vertical Extent
EPSG Code | |
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Vertical Minimum | |
Vertical Maximum |
Extent Group 1 / Time Frame 1
* » Time Frame Type | Range |
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* » Start | 2009-07 |
End | 2009-11 |
Alternate Start As Of Info | |
Alternate End As Of Info | |
Description |
Spatial Information
Spatial Resolution
Angular Distance | |
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Angular Distance Units | |
Horizontal Distance | |
Horizontal Distance Units | |
Vertical Distance | |
Vertical Distance Units | |
Equivalent Scale Denominator | |
Level of Detail Description |
Spatial Representation
Grid Representation Used? | |
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Vector Representation Used? | Yes |
Text / Table Representation Used? | |
TIN Representation Used? | |
Stereo Model Representation Used? | |
Video Representation Used? |
Grid Representation
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Axis Dimension |
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Vector Representation
Topology Level | |
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Complex Object Present? | |
Complex Object Count | |
Composite Object Present? | |
Composite Object Count | |
Curve Object Present? | Yes |
Curve Object Count | 168632 |
Point Object Present? | |
Point Object Count | |
Solid Object Present? | |
Solid Object Count | |
Surface Object Present? | |
Surface Object Count |
Vector Representation
Topology Level | |
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Complex Object Present? | |
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Composite Object Present? | |
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Curve Object Present? | |
Curve Object Count | |
Point Object Present? | |
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Solid Object Present? | |
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Surface Object Present? | |
Surface Object Count |
Reference Systems
Reference System
EPSG Code | |||||||||||||||||||||||||||||
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Horizontal Resolution |
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Vertical Resolution |
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Access Information
Data License | |
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Data License URL | |
Data License Statement | |
* » Security Class | Unclassified |
* Security Classification System | |
Security Handling Description | |
• Data Access Policy | |
» Data Access Procedure | |
• » Data Access Constraints |
None |
• Data Use Constraints |
Must read and fully comprehend the metadata prior to use, acknowledgment of the Originator when using the data set as a source, data should not be used beyond the limits of the source scale |
Metadata Access Constraints | |
Metadata Use Constraints |
Distribution Information
Start Date | |
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» Download URL | http://www.ngs.noaa.gov/GRAV-D/data_an01.shtml |
Distributor | |
File Name | |
Description |
Downloadable Data |
File Date/Time | |
File Type (Deprecated) | ASCII |
Distribution Format | Text (Unstructured) |
File Size | |
Application Version | |
Compression | Uncompressed |
Review Status |
Start Date | |
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End Date | |
» Download URL | |
Distributor | |
File Name | |
Description | |
File Date/Time | |
File Type | |
FGDC Content Type | |
File Size | |
Application Version | |
Compression | |
Review Status |
Start Date | |
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End Date | |
» Download URL | |
Distributor | |
File Name | |
Description | |
File Date/Time | |
File Type | |
FGDC Content Type | |
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Application Version | |
Compression | |
Review Status |
Start Date | |
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End Date | |
» Download URL | |
Distributor | |
File Name | |
Description | |
File Date/Time | |
File Type | |
FGDC Content Type | |
File Size | |
Application Version | |
Compression | |
Review Status |
Archive Information
Location | |
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File Identifier | |
File Name | |
URL | |
Description | |
DOI | |
Archive Date | |
Archive Update Frequency |
Location | |
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File Identifier | |
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URL | |
Description | |
DOI | |
Archive Date | |
Archive Update Frequency |
Location | |
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File Identifier | |
File Name | |
URL | |
Description | |
DOI | |
Archive Date | |
Archive Update Frequency |
URLs
URL | http://www.ngs.noaa.gov/GRAV-D/data_an01.shtml |
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Name | |
URL Type | Online Resource |
File Resource Format | |
Description |
URL | http://www.ngs.noaa.gov/GRAV-D/data_products.shtml |
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Name | |
URL Type | Online Resource |
File Resource Format | |
Description |
URL | http://www.ngs.noaa.gov/ |
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Name | |
URL Type | Online Resource |
File Resource Format | |
Description |
URL | |
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Name | |
URL Type | |
File Resource Format | |
Description |
URL | |
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Name | |
URL Type | |
File Resource Format | |
Description |
URL | |
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Name | |
URL Type | |
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Description |
Activity Log
Activity Time | 2015-03-31 |
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Activity Type | |
Responsible Party | |
Description |
Date that the source FGDC record was last modified. |
Activity Time | 2017-04-05 |
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Activity Type | |
Responsible Party | |
Description |
Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. |
Activity Time | 2017-09-13 |
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Activity Type | |
Responsible Party | |
Description |
Partial upload of Spatial Info section only. |
Activity Time | 2017-11-01 |
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Activity Type | |
Responsible Party | |
Description |
Replaced entire Lineage section to populate new Source Contribution field. |
Activity Time | 2018-02-08 |
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Activity Type | |
Responsible Party | |
Description |
Partial upload of Positional Accuracy fields only. |
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Issues
Issue Date | |
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Author | |
Issue |
Issue Date | |
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Author | |
Issue |
Issue Date | |
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Author | |
Issue |
Technical Environment
Description |
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Data Quality
Representativeness | |
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Accuracy |
The absolute accuracy of airborne gravity is difficult to quantify. The following measures are indicators of data quality, but are not definitive measures. The cross over precision is 3.87 mGals, which is a combination of differences between cross track and data track and may not be indicative of data quality. Adjacent data lines have an average cross-correlation of 76.02%. Low correlation between adjacent lines may indicate either poor quality on one of the two lines or rapidly changing features. More detailed information can be found at http://www.ngs.noaa.gov/GRAV-D/data_an01.shtml. |
Analytical Accuracy | |
Horizontal Positional Accuracy |
GPS horizontal positions are good to 0.009 meters average standard deviation. More detailed information can be found at http://www.ngs.noaa.gov/GRAV-D/data_an01.shtml. |
Vertical Positional Accuracy |
GPS vertical positions are good to 0.012 meters average standard deviation. More detailed information can be found at http://www.ngs.noaa.gov/GRAV-D/data_an01.shtml. |
Quantitation Limits | |
Bias | |
Comparability | |
Completeness Measure | |
Precision | |
Analytical Precision | |
Field Precision | |
Sensitivity | |
Detection Limit | |
Completeness Report |
Due to the altitude, speed of data collection, and track spacing of 10 kilometers the resolution of these data are limited to 20 kilometers. More detailed information can be found at http://www.ngs.noaa.gov/GRAV-D/data_an01.shtml. |
Conceptual Consistency |
Data processing is fully automated and output file is computer generated. All lines are checked by an analyst and any errors in production are corrected. More detailed information can be found at http://www.ngs.noaa.gov/GRAV-D/data_an01.shtml. |
» Quality Control Procedures Employed |
Data Management
» Have Resources for Management of these Data Been Identified? | |
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» Approximate Percentage of Budget for these Data Devoted to Data Management | |
» Do these Data Comply with the Data Access Directive? | |
» Is Access to the Data Limited Based on an Approved Waiver? | |
» If Distributor (Data Hosting Service) is Needed, Please Indicate | |
» Approximate Delay Between Data Collection and Dissemination | |
» If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed |
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» Actual or Planned Long-Term Data Archive Location | |
» If World Data Center or Other, Specify | |
» If To Be Determined, Unable to Archive, or No Archiving Intended, Explain |
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» Approximate Delay Between Data Collection and Archiving | |
» How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive? |
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Lineage
» Lineage Statement |
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Sources
Citation Title | Processed GPS Data from Survey AK09 |
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Contact Role Type | |
Contact Type | |
Contact Name | NOAA's National Geodetic Survey |
Publish Date | |
Extent Type | Range |
Extent Start Date/Time | 2009-07 |
Extent End Date/Time | 2009-08 |
Scale Denominator | |
Citation URL | |
Citation URL Name | |
Citation URL Description | |
Source Contribution |
Processed GPS data is created from tying kinematic GPS data from the plane to base stations on the ground and is used to process and tie gravity measurements | Type of Source Media: digital |
Citation Title | Processed GPS Data from Survey AK10-1 |
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Contact Role Type | |
Contact Type | |
Contact Name | NOAA's National Geodetic Survey |
Publish Date | 2015-03-01 |
Extent Type | Range |
Extent Start Date/Time | 2010-06 |
Extent End Date/Time | 2010-08 |
Scale Denominator | |
Citation URL | |
Citation URL Name | |
Citation URL Description | |
Source Contribution |
Processed GPS data is created from tying kinematic GPS data from the plane to base stations on the ground and is used to process and tie gravity measurements | Type of Source Media: digital |
Citation Title | Raw GPS and Gravity Data from Survey AK09 |
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Contact Role Type | |
Contact Type | |
Contact Name | NOAA's National Geodetic Survey |
Publish Date | 2015-03-31 |
Extent Type | Range |
Extent Start Date/Time | 2009-07 |
Extent End Date/Time | 2009-08 |
Scale Denominator | |
Citation URL | |
Citation URL Name | |
Citation URL Description | |
Source Contribution |
Airborne gravity survey, including data collection from airborne and ground GPS, IMUs, and gravimeters, that was included in this geographic block | Source Geospatial Form: tabular digital data | Type of Source Media: digital |
Citation Title | Raw GPS and Gravity Data from Survey AK10-1 |
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Contact Role Type | |
Contact Type | |
Contact Name | NOAA's National Geodetic Survey |
Publish Date | 2015-03-31 |
Extent Type | Range |
Extent Start Date/Time | 2010-06 |
Extent End Date/Time | 2010-08 |
Scale Denominator | |
Citation URL | |
Citation URL Name | |
Citation URL Description | |
Source Contribution |
Airborne gravity survey, including data collection from airborne and ground GPS, IMUs, and gravimeters, that was included in this geographic block | Source Geospatial Form: tabular digital data | Type of Source Media: digital |
Citation Title | |
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Extent Type | |
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Citation URL Description | |
Scale Denominator |
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Contact Role Type | |
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Publish Date | |
Extent Type | |
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Citation URL Description | |
Scale Denominator |
Process Steps
Process Step Number | 1 |
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» Description |
GPS data processed using POSPac 4.4 and Waypoint GrafNav v.7.80.2315 | Source Produced: Processed GPS Data from Survey AK09 |
Process Date/Time | 2009-12-01 00:00:00 |
Process Contact | |
Phone (Voice) | |
Email Address | |
Source | Raw GPS and Gravity Data from Survey AK09 |
Process Step Number | 2 |
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» Description |
Gravity data processed using NGS software Newton 1.2 |
Process Date/Time | 2013-03-01 00:00:00 |
Process Contact | |
Phone (Voice) | |
Email Address | |
Source | Raw GPS and Gravity Data from Survey AK09 |
Process Step Number | 3 |
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» Description |
GPS data processed using POSPac 4.4 and Waypoint GrafNav v.7.80.2315 | Source Produced: Processed GPS Data from Survey AK10-1 |
Process Date/Time | 2015-03-01 00:00:00 |
Process Contact | |
Phone (Voice) | |
Email Address | |
Source | Raw GPS and Gravity Data from Survey AK10-1 |
Process Step Number | 4 |
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» Description |
Gravity data processed using NGS software Newton 1.2 |
Process Date/Time | 2015-03-01 00:00:00 |
Process Contact | |
Phone (Voice) | |
Email Address | |
Source | Raw GPS and Gravity Data from Survey AK10-1 |
Process Step Number | |
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» Description | |
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» Description | |
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Email Address | |
Source |
Acquisition Information
Instruments
Instrument Unavailable Reason |
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Identifier | |
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Docucomp UUID | |
Instrument / Gear | |
Instrument Type | |
Description |
Identifier | |
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Instrument / Gear | |
Instrument Type | |
Description |
Identifier | |
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Instrument / Gear | |
Instrument Type | |
Description |
Platforms
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Mounted Instruments |
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FAQs
Date | |
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Question | |
Answer |
Child Items
Rubric scores updated every 15m
Score | Type | Title |
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Related Items
Item Type | Relationship Type | Title |
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Catalog Details
Catalog Item ID | 39699 |
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Metadata Record Created By | Tyler Christensen |
Metadata Record Created | 2017-04-05 13:06+0000 |
Metadata Record Last Modified By | SysAdmin InPortAdmin |
» Metadata Record Last Modified | 2023-10-17 16:12+0000 |
Metadata Record Published | 2018-02-08 |
Owner Org | NGS |
Metadata Publication Status | Published Externally |
Do Not Publish? | N |
Metadata Workflow State | Published / External |
Metadata Last Review Date | 2018-02-08 |
Metadata Review Frequency | 1 Year |
Metadata Next Review Date | 2019-02-08 |
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