Airborne Gravity: NGS' Gravity Data for ES07 (2017-2019)
National Geodetic Survey
Data Set
(DS)
| ID: 58336
| Published / External
Created: 2019-12-17
|
Last Modified: 2023-10-17
Project (PRJ) | ID: 37222
ID: 58336
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
* » Title | Airborne Gravity: NGS' Gravity Data for ES07 (2017-2019) |
---|---|
Short Name | GRAVD_ES07 |
* Status | Completed |
Creation Date | 2019 |
Revision Date | Unknown |
• Publication Date | 2019-12 |
* » Abstract |
Airborne gravity data for coastal South Carolina and Georgia collected 2017-2019 over 4 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_es07.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 | |
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 |
NGDA Portfolio Themes | Geodetic Control Theme |
NGDA Portfolio Themes | National Geospatial Data Asset |
NGDA Portfolio Themes | NGDA |
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 | DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce |
NASA/GCMD Platform Keywords | Platform > Aircraft > Gulfstream IV |
NASA/GCMD Platform Keywords | Platform > Aircraft > King Air |
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 |
---|---|
* Spatial Keywords
Thesaurus | Keyword |
---|---|
Stratum Keywords
Thesaurus | Keyword |
---|---|
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 |
---|---|
• » City | Silver Spring |
• » State/Province | MD |
• Country | |
• » Location Description |
Data Set Information
* Data Set Scope Code | Data Set |
---|---|
• Data Set Type | Text files |
• 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_es07.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 | GRAV-D Team |
Support Roles
* » Support Role | Data Steward |
---|---|
* » Date Effective From | 2017-06 |
Date Effective To | |
Position | GRAV-D Project Manager |
Email Address | NGS.GRAVD@noaa.gov |
Phone | 240-533-9641 |
Fax | 301-713-4327 |
Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | Distributor |
---|---|
* » Date Effective From | 2017-06 |
Date Effective To | |
Position | GRAV-D Project Manager |
Email Address | NGS.GRAVD@noaa.gov |
Phone | 240-533-9641 |
Fax | 301-713-4327 |
Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | Metadata Contact |
---|---|
* » Date Effective From | 2017-06 |
Date Effective To | |
Position | GRAV-D Project Manager |
Email Address | NGS.GRAVD@noaa.gov |
Phone | 240-533-9641 |
Fax | 301-713-4327 |
Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | Point of Contact |
---|---|
* » Date Effective From | 2017-06 |
Date Effective To | |
Position | GRAV-D Project Manager |
Email Address | NGS.GRAVD@noaa.gov |
Phone | 240-533-9641 |
Fax | 301-713-4327 |
Mobile | |
URL | |
Business Hours | |
Contact Instructions |
* » Support Role | |
---|---|
* » Date Effective From | |
Date Effective To | |
* » Contact | |
* Contact Instructions |
* » Support Role | |
---|---|
* » Date Effective From | |
Date Effective To | |
* » Contact | |
* Contact Instructions |
* » Support Role | |
---|---|
* » Date Effective From | |
Date Effective To | |
* » Contact | |
* Contact Instructions |
Extents
Currentness Reference | Ground Condition |
---|
Extent Group 1
Extent Description |
---|
Extent Group 1 / Geographic Area 1
* » W° Bound | -83 |
---|---|
* » E° Bound | -75.25 |
* » N° Bound | 34 |
* » S° Bound | 30.75 |
* » Description |
Extent Group 1 / Vertical Extent
EPSG Code | |
---|---|
Vertical Minimum | |
Vertical Maximum |
Extent Group 1 / Time Frame 1
* » Time Frame Type | Range |
---|---|
* » Start | 2017-09 |
End | 2019-12 |
Alternate Start As Of Info | |
Alternate End As Of Info | |
Description |
Spatial Information
Spatial Resolution
Angular Distance | |
---|---|
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? | |
---|---|
Vector Representation Used? | |
Text / Table Representation Used? | |
TIN Representation Used? | |
Stereo Model Representation Used? | |
Video Representation Used? |
Grid Representation
Dimension Count | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Cell Geometry | |||||||||||||
Transformation Parameter Available? | |||||||||||||
Axis Dimension |
|||||||||||||
|
|||||||||||||
Axis Dimension |
|||||||||||||
|
Vector Representation
Topology Level | |
---|---|
Complex Object Present? | |
Complex Object Count | |
Composite Object Present? | |
Composite Object Count | |
Curve Object Present? | |
Curve Object Count | |
Point Object Present? | |
Point Object Count | |
Solid Object Present? | |
Solid Object Count | |
Surface Object Present? | |
Surface Object Count |
Reference Systems
Reference System
EPSG Code | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Horizontal Resolution |
|||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||
Vertical Resolution |
|||||||||||||||||||||||||||||
|
Access Information
Data License | |
---|---|
Data License URL | |
Data License Statement | |
* » Security Class | Unclassified |
* Security Classification System | |
Security Handling Description | |
• Data Access Policy | |
» Data Access Procedure |
https://www.ngs.noaa.gov/grav-d/data_products.shtml |
• » 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 | 2019-12-18 |
---|---|
End Date | Present |
» Download URL | http://www.ngs.noaa.gov/GRAV-D/data_es07.shtml |
Distributor | GRAV-D Project Manager (2017-06 - Present) |
File Name | NGS_GRAVD_Block_ES07_BETA1.txt |
Description |
Downloadable Data |
File Date/Time | 2019-11-26 08:43:00 |
File Type (Deprecated) | ASCII |
Distribution Format | Text (Unstructured) |
File Size | 50 MB |
Application Version | Newton v1.4 |
Compression | Zip |
Review Status |
Start Date | |
---|---|
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 | |
---|---|
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 | |
---|---|
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 | |
---|---|
File Identifier | |
File Name | |
URL | |
Description | |
DOI | |
Archive Date | |
Archive Update Frequency |
Location | |
---|---|
File Identifier | |
File Name | |
URL | |
Description | |
DOI | |
Archive Date | |
Archive Update Frequency |
Location | |
---|---|
File Identifier | |
File Name | |
URL | |
Description | |
DOI | |
Archive Date | |
Archive Update Frequency |
URLs
URL | http://www.ngs.noaa.gov/GRAV-D/data_es07.shtml |
---|---|
Name | |
URL Type | Online Resource |
File Resource Format | |
Description |
URL | http://www.ngs.noaa.gov/GRAV-D/data_products.shtml |
---|---|
Name | |
URL Type | Online Resource |
File Resource Format | |
Description |
URL | http://www.ngs.noaa.gov/ |
---|---|
Name | |
URL Type | Online Resource |
File Resource Format | |
Description |
URL | |
---|---|
Name | |
URL Type | |
File Resource Format | |
Description |
URL | |
---|---|
Name | |
URL Type | |
File Resource Format | |
Description |
URL | |
---|---|
Name | |
URL Type | |
File Resource Format | |
Description |
Activity Log
Activity Time | |
---|---|
Activity Type | |
Responsible Party | |
Description |
Activity Time | |
---|---|
Activity Type | |
Responsible Party | |
Description |
Activity Time | |
---|---|
Activity Type | |
Responsible Party | |
Description |
Issues
Issue Date | |
---|---|
Author | |
Issue |
Issue Date | |
---|---|
Author | |
Issue |
Issue Date | |
---|---|
Author | |
Issue |
Technical Environment
Description |
|
---|
Data Quality
Representativeness | |
---|---|
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 1.27 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 99.22%. 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_es07.shtml. |
Analytical Accuracy | |
Horizontal Positional Accuracy | |
Vertical Positional Accuracy | |
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_es07.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_es07.shtml. |
» Quality Control Procedures Employed |
Data are processed shortly after flying to ensure that all instruments are working and data quality is acceptable. Field personnel perform data checks at least once per day to ensure all GPS receivers, the gravimeter, and IMUs are working up to standard. The field personnel also process GPS and gravity data, mapping the preliminary gravity product, to check quality. Additional quality control plots are built into the GPS and gravity processing software packages for advanced data analysis in the field. After processing data are compared to an existing geoid model. In addition processed gravity is compared at common points from several flight lines crossing the survey lines to verify consistent gravity measurements in the same location.. More detailed information can be found at http://www.ngs.noaa.gov/GRAV-D/data_es07.shtml. |
Data Management
» Have Resources for Management of these Data Been Identified? | |
---|---|
» 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 |
|
» 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 |
|
» 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? |
|
Lineage
» Lineage Statement |
---|
Sources
Citation Title | Raw GPS Data from GRAV-D surveys FL18-1, GA17-1, GA18-1, and MS19-1. |
---|---|
Contact Role Type | Originator |
Contact Type | Organization |
Contact Name | National Geodetic Survey |
Publish Date | 2019-12-18 |
Extent Type | Range |
Extent Start Date/Time | 2017-09 |
Extent End Date/Time | 2019-12 |
Scale Denominator | |
Citation URL | |
Citation URL Name | |
Citation URL Description | |
Source Contribution |
Citation Title | Raw Gravity Data from GRAV-D surveys FL18-1, GA17-1, GA18-1, and MS19-1. |
---|---|
Contact Role Type | Originator |
Contact Type | Organization |
Contact Name | NOAA's National Geodetic Survey |
Publish Date | 2019-12-18 |
Extent Type | Range |
Extent Start Date/Time | 2017-09 |
Extent End Date/Time | 2019-12 |
Scale Denominator | |
Citation URL | |
Citation URL Name | |
Citation URL Description | |
Source Contribution |
Citation Title | |
---|---|
Contact Role Type | |
Contact Type | |
Contact Name | |
Publish Date | |
Extent Type | |
Extent Start Date/Time | |
Extent End Date/Time | |
Citation URL | |
Citation URL Name | |
Citation URL Description | |
Scale Denominator |
Citation Title | |
---|---|
Contact Role Type | |
Contact Type | |
Contact Name | |
Publish Date | |
Extent Type | |
Extent Start Date/Time | |
Extent End Date/Time | |
Citation URL | |
Citation URL Name | |
Citation URL Description | |
Scale Denominator |
Citation Title | |
---|---|
Contact Role Type | |
Contact Type | |
Contact Name | |
Publish Date | |
Extent Type | |
Extent Start Date/Time | |
Extent End Date/Time | |
Citation URL | |
Citation URL Name | |
Citation URL Description | |
Scale Denominator |
Process Steps
Process Step Number | 1 |
---|---|
» Description |
GPS data processed using NovAtel Waypoint Inertial Explorer 8.7 from GRAV-D surveys FL18-1, GA17-1, GA18-1, and MS19-1. |
Process Date/Time | |
Process Contact | GRAV-D Project Manager |
Phone (Voice) | 240-533-9641 |
Email Address | NGS.GRAVD@noaa.gov |
Source | Raw GPS Data from GRAV-D surveys FL18-1, GA17-1, GA18-1, and MS19-1. |
Process Step Number | 2 |
---|---|
» Description |
Gravity data from GRAV-D surveys FL18-1, GA17-1, GA18-1, and MS19-1 processed using NGS software Newton v1.4 |
Process Date/Time | |
Process Contact | GRAV-D Project Manager |
Phone (Voice) | 240-533-9641 |
Email Address | NGS.GRAVD@noaa.gov |
Source | Raw Gravity Data from GRAV-D surveys FL18-1, GA17-1, GA18-1, and MS19-1. |
Process Step Number | |
---|---|
» Description | |
Process Date/Time | |
Process Contact | |
Phone (Voice) | |
Email Address | |
Source |
Process Step Number | |
---|---|
» Description | |
Process Date/Time | |
Process Contact | |
Phone (Voice) | |
Email Address | |
Source |
Process Step Number | |
---|---|
» Description | |
Process Date/Time | |
Process Contact | |
Phone (Voice) | |
Email Address | |
Source |
Acquisition Information
Instruments
Instrument Unavailable Reason |
---|
Identifier | |
---|---|
Docucomp UUID | |
Instrument / Gear | |
Instrument Type | |
Description |
Identifier | |
---|---|
Docucomp UUID | |
Instrument / Gear | |
Instrument Type | |
Description |
Identifier | |
---|---|
Docucomp UUID | |
Instrument / Gear | |
Instrument Type | |
Description |
Platforms
Platform Unavailable Reason |
---|
Identifier | |||||||
---|---|---|---|---|---|---|---|
Docucomp UUID | |||||||
Description | |||||||
Mounted Instruments |
|||||||
|
Identifier | |||||||
---|---|---|---|---|---|---|---|
Docucomp UUID | |||||||
Description | |||||||
Mounted Instruments |
|||||||
|
Identifier | |||||||
---|---|---|---|---|---|---|---|
Docucomp UUID | |||||||
Description | |||||||
Mounted Instruments |
|||||||
|
FAQs
Date | |
---|---|
Author | |
Question | |
Answer |
Child Items
Rubric scores updated every 15m
Score | Type | Title |
---|---|---|
Related Items
Item Type | Relationship Type | Title |
---|---|---|
Catalog Details
Catalog Item ID | 58336 |
---|---|
Metadata Record Created By | Jeff Johnson |
Metadata Record Created | 2019-12-17 13:49+0000 |
Metadata Record Last Modified By | SysAdmin InPortAdmin |
» Metadata Record Last Modified | 2023-10-17 16:12+0000 |
Metadata Record Published | 2019-12-18 |
Owner Org | NGS |
Metadata Publication Status | Published Externally |
Do Not Publish? | N |
Metadata Workflow State | Published / External |
Metadata Last Review Date | 2019-12-18 |
Metadata Review Frequency | 1 Year |
Metadata Next Review Date | 2020-12-18 |
Tags |
---|