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C&C Offers Free GIS
Related sites
Links to related information:
Global Positioning System Operations Center
WGS 84, N=M=180 EARTH GRAVITY MODEL
- 30-Minute Geoid Height Model as employed by the C-Nav GPS Receiver
Real Time JPL Monitor Status
- status of JPL/NASA RTG Solution Research/Test-Bed
NASA's IGDG
(Internet-based Global Differential GPS)
National Geodetic Survey
NGS Precise GPS Orbits
US Coast Guard Navigation Center
- including links to latest NANU information
GPS Almanac
from YUMA
Ionospheric and Atmospheric Remote Sensing
including
Scintillation
due to the Total Electron Content of the Atmosphere
A Schematic of
W.A.A.S.
- Wide Area Augmentation System
Overview of
E.G.N.O.S.
- European Geostationary Navigation Overlay Service
EGS, Ltd. - Earth Sciences & Surveying
Mapping the Seabed on an Absolute Reference Frame System Using the Real-Time GIPSY (RTG) Global Differential GPS & RTK Positioning
- Navigator (NAVO)
ITRF
- International Terrestrial Reference Frame
Space Environment Center
The Institute of Navigation
The Radio Technical Commission for Maritime Services
U.S. DoC - NOAA - NOS - National Geodetic Survey
"Out of Season" Sunspots Blank GNSS Receivers
- InsideGNSS