NCGS

Geodetic News Archive

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
MARINE CORPS SPECIAL OPERATIONS COMMAND
NORTH CAROLINA (MSOCNC) 26-01
07- 14 January / Camp Lejeune, NC

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
CARRIER STRIKE GROUP FOUR (CSG4) 25-07
10 December / Off-the-Coast, SC

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
MARINE CORPS SPECIAL OPERATIONS COMMAND
NORTH CAROLINA (MSOCNC) 25-05
01 – 12 December / Jacksonville, NC

The National Oceanic and Atmospheric Administration (NOAA) has issued a space weather forecast for a severe (scale G4) geomagnetic storm that could impact GPS navigation on the afternoon of Wednesday, November 12th, 1:00 pm EST to 4:00 pm EST (18:00 UTC to 21:00 UTC).

Potential impacts to GPS navigation:

• Strong (scale G3): Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
• Severe (scale G4): Satellite navigation (GPS) degraded or inoperable for hours.

NOAA Space Weather info:

• Space weather scales explanation
• Space weather notices for the previous 30 days
• Space weather codes

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
CARRIER STRIKE GROUP FOUR (CSG4) 25-06 (REVISION 1)
31 October - 09 November / Off-the-Coast, SC

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
FORT BRAGG NORTH CAROLINA (FTBRNC) 25-73 (REVISION 1)
04 - 07 October 2025 / Fort Bragg, NC

Please note that this particular test is not the typical GPS interference test that is centered at a point and impacting an expanding radius with increasing elevation like an upside-down truncated cone. Rather, this test will impact the following area from the surface to UNL (altitudes greater than 99,900 FT):

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
MARINE CORPS INSTALLATIONS EAST NORTH CAROLINA (MCIENC) 25-01
04 October / Atlantic, NC

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
FORT PICKETT VIRGINIA (FTPKVA) 25-78
16 - 24 September / Fort Pickett, VA

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
FORT BRAGG NORTH CAROLINA (FTBRNC) 25-46
23 - 25 July 2025 / Fort Bragg, NC

Please note that this particular test is not the typical GPS interference test that is centered at a point and impacting an expanding radius with increasing elevation like an upside-down truncated cone. Rather, this test will impact the following area from the surface to UNL (altitudes greater than 99,900 FT):

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
CARRIER STRIKE GROUP FOUR (CSG4) 25-05
26 - 29 June / Off-The-Coast, SC

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
MARINE CORPS SPECIAL OPERATIONS COMMAND NORTH CAROLINA (MSOCNC) 25-04
19 June 2025 / Bogue Field, NC

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
MARINE CORPS SPECIAL OPERATIONS COMMAND NORTH CAROLINA (MSOCNC) 25-01 (REVISION 1)
02 – 20 June / Holly Ridge, NC

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
CARRIER STRIKE GROUP FOUR (CSG4) 25-03
20 May 2025 / Off-the-Coast, NC

Please note that this particular test is not the typical GPS interference test that is centered at a point and impacting an expanding radius with increasing elevation like an upside-down truncated cone. Rather, this test will impact the following area from the surface to UNL (altitudes greater than 99,900 FT):

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
MARINE CORPS SPECIAL OPERATIONS COMMAND NORTH CAROLINA (MSOCNC) 25-03 (REVISION 1)
05 – 09 May / Holly Ridge, NC

The National Oceanic and Atmospheric Administration (NOAA) issued the following space weather alert of a geomagnetic storm, which has since passed, that may have resulted in GPS navigation and positioning problems of loss-of-lock and increased range error:

ALERT: Geomagnetic K-index of 7 (ALTK07)

• Serial Number: 181
• Issue Time: 2025 Apr 16 1424 UTC [10:24 EDT]
• Threshold Reached: 2025 Apr 16 1418 UTC [10:18 am EDT]
• Synoptic Period: 1200-1500 UTC [8:00 am EDT - 11:00 am EDT]
• NOAA Scale: G3 - Strong

NOAA Space Weather info:

• Space weather scales explanation
• Space weather notices for the previous 30 days
• Space weather codes

Potential impacts to GPS: Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may have occurred.

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
MARINE CORPS SPECIAL OPERATIONS COMMAND (MSOCNC) 25-02
05 – 15 April / Sneads Ferry, NC

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
CARRIER STRIKE GROUP FOUR (CSG4) 25-02
23 March - 02 April / Off-The-Coast, SC

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
FORT STEWART GEORGIA (FTSTGA) 25-16
04 – 12 March / Fort Stewart, GA

Please note that this particular test is not the typical GPS interference test that is centered at a point and impacting an expanding radius with increasing elevation like an upside-down truncated cone. Rather, this test will impact the following area from the surface to UNL (altitudes greater than 99,900 FT):

The NC Geodetic Survey announces three positions open for applicants. The positions are listed by title below, with a link to a detailed posting and application for each.

Note that the following positions have closed but the links will be left up for archive purposes.

Survey Crew Technician: https://www.governmentjobs.com/careers/northcarolina/jobs/4726044/survey-crew-technician

Survey Crew Technician: https://www.governmentjobs.com/careers/northcarolina/jobs/4736724/survey-crew-technician

CORS/RTN Manager: https://www.governmentjobs.com/careers/northcarolina/jobs/4828841/cors-rtn-manager

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
FORT LIBERTY NORTH CAROLINA (FTLBNC) 25-26
09 - 12 February / Fort Liberty, NC

Please note that this particular test is not the typical GPS interference test that is centered at a point and impacting an expanding radius with increasing elevation like an upside-down truncated cone. Rather, this test will impact the following area from the surface to UNL (altitudes greater than 99,900 FT):

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
FORT LIBERTY NORTH CAROLINA (FTLBNC) 25-14 (REVISION 1)
30 January - 04 February / Fort Liberty, NC

Please note that this particular test is not the typical GPS interference test that is centered at a point and impacting an expanding radius with increasing elevation like an upside-down truncated cone. Rather, this test will impact the following area from the surface to UNL (altitudes greater than 99,900 FT MSL):

The Federal Aviation Administration (FAA) has issued the following notice of GPS interference testing that may result in unreliable or unavailable GPS signal:

FLIGHT ADVISORY GPS INTERFERENCE TESTING
CARRIER STRIKE GROUP FOUR (CSG4) 25-01
30 January - 01 February / Off-The-Coast, SC

Users of the NCGS Geodetic Control Database (https://ncgs.nc.gov/geodeticmonuments) may notice some intermittent outages. NCGS is aware of the issue and is working to resolve it as quickly as possible.

In the meantime, users may want to try accessing the database via a different browser, and/or users may try a hard refresh to force the browser to fully reload the database page. On most browsers a hard refresh can be accomlished by pressing CTRL+F5, but users should consult their browser help resources for exact instructions. Neither of these solutions are a guaranteed fix, but they have resolved the issue in some cases.

As of today, June 1, 2020, the VRS_CMRx and VRS_RTCM32 mountpoints have been configured to include the Galileo and BeiDou satellite data into the correction solution to NC RTN users. CMRx and RTCM 3.2 are the only versions of the output formats the NC RTN has available for the mountpoints that support the Galileo and BeiDou satellite data. The other mountpoints (VRS_CMRp, VRS_RTCM23, VRS_RTCM3) will still include only the GPS and GLONASS satellite data in the solution. Although the VRS_CMRx and VRS_RTCM32 mountpoints are now configured to include the Galileo and BeiDou satellite data, users may not receive any BeiDou satellite correction data because the NC RTN application can’t process the data from the latest BeiDou satellites (BeiDou-3) yet.

The NC Geodetic Survey website has undergone some recent back-end changes to enhance security and functionality. If you have not already done so, please update your bookmark for the NCGS page to the URL below.

A collection of short, informative videos about various topics have been made available. The videos can be accessed by clicking the links below:

The NGS HQ building experienced a fire event Friday Sept 9. All servers were shut down and limited user functionality such as CORS data, datasheets and geodetic utilities were switched to the backup systems in Boulder, CO. NGS is working on restoring full service sometime Monday Sept. 12.

A pair of short, informative videos about EDMI baselines are now available. The videos can be accessed by clicking the links below:

The North Carolina Geodetic Survey selected the following private surveying firms for the aerial imagery quality control (QC) project (RFQ #295-01-2016):

• CESI

• Stantec Consulting Services Inc.

• Vaughn & Melton Consulting Engineers, Inc.

The North Carolina Geodetic Survey (NCGS) intends to award multiple Qualifications-Based Selection (QBS) contracts to private surveying firms for the purpose of performing aerial imagery quality control (QC) surveys utilizing Global Navigation Satellite System (GNSS) and traditional survey methods to support the Statewide Digital Orthoimagery Project.

The purpose of the orthoimagery project, which is funded by the North Carolina 911 Board (http://www.nc911.nc.gov/), is to collect seamless aerial imagery for use by local 911 agencies; local, state and federal agencies; and the public.

The work for this Request for Qualifications (RFQ) would consist of performing horizontal and vertical quality control (QC) survey projects.  For more information, please visit the following URL:

https://www.ips.state.nc.us/ips/AGENCY/PDF/11154000.pdf​

Users wishing to download NC spatial data may do so at the following link:

https://rmp.nc.gov/sdd/​

A series of short video tutorials are now available to help navigate the most-recently developed NC Geodetic Database. The videos can be accessed by clicking the link below:

The National Geodetic Survey (NGS) is pleased to announce the Beta release of a new and improved transformation tool in the NGS geodetic toolkit. This redesigned version supports the transformation between geodetic coordinates and State Plane Coordinates (SPC), Universal Transverse Mercator (UTM) coordinates, Cartesian coordinates (XYZ), and U.S. National Grid (USNG) coordinates as a one-stop solution. It features transformation of single or multiple points, Web services, and software downloads. NGS encourages users to try the Beta Version and provide feedback to Krishna.Tadepalli@noaa.gov so the final version may be improved prior to release as on official NGS product.

The update was in the development stage for several months, and it provides surveyors and geodesists with a more efficient and streamlined way of accessing frequently used NGS tools in the geodetic toolkit. The new interface allows one-page easy access to transformations that were previously available only on separate pages.

The Beta version is accessible at: http://beta.ngs.noaa.gov/gtkweb

​From NGS

"When using the geoid models, please be advised that GEOID12B should supersede previous models GEOID12 and GEOID12A. GEOID12B is identical to GEOID12A everywhere, except in Puerto Rico and Virgin island region. For more detail, please read Technical details."

Visit the GEOID12B page at NGS: http://www.ngs.noaa.gov/GEOID/GEOID12B/