pNav Versions Comparison

Cold Start

Ideal Conditions 1)

pNav could start takes app. 60 seconds. and is app. 10% faster than pNav2.

pNav2 is app. 10% slower than pNav. Cold start s takes app. 70 seconds.

Real Conditions2)

pNav cold start is problematic and can take up to hours. Acquisition is not guaranteed.

pNav2 cold start is reliable and takes at most a couple of minutes; see the Navigation of Rotating Satellite in the datasheet.

Reaqusition

Position fix exists

Fast using Almanach data for both pNav and pNav2.

No position fix

Same problem as Real Conditions Acquisition.

pNav is very slow. Reacquisition is not guaranteed.

pNav2 reacquisition is reliable and takes at most a couple of minutes; see the “Navigation of Rotating Satellite” in the datasheet.

Tracking Sensitivity

pNav can track only open sky satellites.

The tracking loops of pNav2 were optimized to track weak signals; see the “Navigation of Rotating Satellite” in the datasheet.

Antenna

3.3V feeding. No feeding current limiter.

2.85V feeding. Feeding current limiter. Power supply 2.85 V. Supply current limiter. For optimal noise and intermodulation suppression, we recommend an active antenna with a wide beam and LNA gain of maximum 10 dB.

1) The antenna is pointed towards the zenith; the satellite is attitude-controlled and stable, with a perfect view of the sky.
2) At least one condition of Ideal Conditions is not satisfied.