Satellites - Broadcast Data

The Satellites - Broadcast Data page provides access to several types of data which are broadcast by GPS satellites. The data includes

Use the Menu button to select one of the four types of data to view. When viewing Ephemeris or Almanac data, you can view the data for All satellites or select any specific single satellite. The information displayed is always the most recently received by the NetRS. For reference, the time at which the data is requested is shown at the bottom of each listing. This is NOT the time at which the data was decoded.

The details of each of the individual fields can be obtained from the GPS Interface Control Document, ICD200C. This document is available from the US Coast Guard Navigation Center.

The GPS broadcast data parameters are described in chapter 20. In particular see the following:
Table 20-IIEphemeris data definitions
Table 20-III Ephemeris parameters.
Table 20-VI Almanac parameters.
Table 20-VII NAV data health indicators.
Table 20-IX UTC parameters.
Table 20-X Ionospheric parameters.

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