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The Automatic Precise Point Positioning Service of the Global Differential GPS System
Unique Features
About GDGPS How to use APPS
Under The Hood Instant Positioning Registered Users Register
APPS Unique Features



  • Multiple input modes: web, email, and direct sFTP deposit support casual as well as power autom ated usage

  • Instant gratification on the web: no registration necessary for basic service; output served in stantly

  • Upload and process multiple RINEX files in a single session

  • Pressure measurements files

  • Accommodate multi-day RINEX files, arbitrary file names

  • All pertinent results in a single output file; optimized for machine processing and human inter face

  • GIPSY output files



  • No latency (using GDGPS real time orbit and clock products)

  • No latency for single frequency data (using GDGPS real time TEC maps)

  • Improved accuracy with more accurate hydrostatic delay model:

  • User-input pressure measurements

  • NCEP Objective Analysis pressure fields

  • Automatic detection of airplane/helicopter data and process optimization

  • Kinematic processing includes filtering and smoothing eliminating convergence artifacts

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