Automatic Precise Positioning Service

The Automatic Precise Positioning Service (APPS) of the Global Differential GPS System (GDGPS) offers two data processing approaches and two latency options.

Data Processing Approaches

Static

Static data processing approach assumes that the GPS measurements were taken at a static site, and will estimate a single set of coordinates for that site.

Kinematic

Kinematic data processing approach assumes that the receiver (actually the antenna) could have been in motion on the ground or in the air, without any constraints about its speed or acceleration. A time series of (antenna) coordinates is estimated at a rate equal to the measurement rate (default) or at a slower rate (optional).

Latency Options

Near Real Time (NRT)

Near Real Time processing will result in the quickest response from APPS, using the best GPS orbit and clock products available at the time of measurement upload.

Most Accurate

Most Accurate processing will wait up to one week in order to ensure processing with JPL's most accurate GPS orbit and clock products, which are produced weekly.