Filter
Top Products
A
Using the FirstGPS API
46
FirstGPS Starter Kit User Guide
1.4.12
npNavStatusType
npNavStatusType contains a set of status words for the following
important data items:
• GPS position availability – Specifies the state of the GPS
position solution, that is, whether any position is available for
use by the receiver or its source, and whether it came from
outside the receiver or was computed internally.
• GPS time availability – Specifies the state of the GPS time
solution, that is, whether the time came from outside the
receiver, from one satellite, or from a GPS fix.
• Receiver oscillator frequency offset availability – Specifies
whether the receiver has an estimate of its oscillator frequency
offset and where it came from.
• Memory – Specifies if any non-volatile memory was available
when the receiver began the current start-up cycle.
• Ephemeris – Each bit in this variable represents the ephemeris
status of a particular satellite (1-32). The bit is one (1) if the
ephemeris is in memory and valid. Otherwise the bit is zero (0).
This field can be used to determine quickly if the receiver needs
ephemeris data.
• Almanac – Specifies the current status of the almanac.
A field similar to the one described above is also available for
the almanac to determine quickly if the receiver needs
almanac data.