Home [www.ngs.noaa.gov]
Process GPS Data (OPUS) Coordinate Conversion and Transformation Tool (NCAT) Geodetic Tool Kit; Geodetic Software; Web Services; Vertical Datum Conversions (VDATUM) GPS Toolbox; GEOID18 Computation; Adjust Leveling (LOCUS) Horizontal Time-Dependent Positioning (HTDP) Surveys. Survey Project Proposal Form; OPUS Share; Mark Recovery
National Geodetic Survey - GPS on Bench Marks Technical Details
GPS on Bench Marks for the Transformation Tool Technical Details. NGS has developed a prioritized list of bench marks on which new GPS observations will be most helpful to develop the best transformations between the current vertical datums and the modernized NSRS in 2022.
NOAA CORS Network - National Geodetic Survey
The NOAA Continuously Operating Reference Station (CORS) Network (NCN), managed by NOAA/National Geodetic Survey, provide Global Navigation Satellite System (GNSS) data, supporting three dimensional positioning, meteorology, space weather, and geophysical applications throughout the United States.
OPUS: Online Positioning User Service - National Oceanic and ...
2024年7月25日 · Solve your GPS position & tie it to the National Spatial Reference System. What is OPUS? FAQs *
An Overview of GPS Continuously Operating Reference Stations
In order to support a wide realm of activities, the receiver must be a high quality geodetic unit capable of tracking and recording all components of the GPS signal. Ideally, a CORS receiver can collect both P-code and C/A-code pseudoranges as well as L1 and L2 carrier phases.
Three National Geodetic Control Networks have been created by the Government to provide the datums. It is the responsibility of the National Geodetic Survey (NGS) to actively maintain the National Geodetic Control Net works (appendix A). These control networks consist of stable, identifiable points tied together by extremely accurate ...
GPS Antenna Calibration at the National Geodetic Survey
GPS antennas are calibrated under somewhat = ideal conditions. These NGS in situ calibrations are performed at the = same site, at a consistent height, and on flat terrain with no = reflectors, other than the ground, that may cause unwanted multipath = reflections leading to …
Geodetic Control Diagrams | National Geodetic Survey
2021年3月23日 · These maps depict the survey networks and geodetic control from traditional surveying methods done when surveyors crossed the nation, e.g. line of sight, triangulation, traverse, trilateration, and leveling.
Frequently Asked Questions: Datums | Datums | National Geodetic …
2018年7月12日 · NGS develops and maintains the current national geodetic vertical datum, NAVD 88. In addition, NGS provides the relationships between past and current geodetic vertical datums, e.g., NGVD 29 and NAVD 88.
NGS Coordinate Conversion and Transformation Tool (NCAT)
2024年5月21日 · Website Owner: National Geodetic Survey / Last modified by ngs.ncat May 21 2024 NOS Home ...