PRS User Community - European GNSS Agency

PRS User Communities
Characterisation
PRS performances & features
• Accuracy:
– GPS/SPS performances fulfil current requirements
– Augmentation services used in particular cases.
• Integrity:
– Overall, no particular requirements expressed by the UCs
– Defence platforms: level of integrity requirements to be
studied on a case-by-case basis
– Space applications: lack of integrity limits the use of
GNSS sole means.
• Continuity:
– Not fully satisfactory today, main issue being in urban &
mountain canyons
• Availability:
– Poor availability of the GPS satellites is an issue at high
latitudes and in urban environment
• Time to First Fix:
– Improvement would be welcome in case of cold and
even hot start of the receiver in particular in urban
environments.
• Robustness/Security:
– Interferences/jamming not been clearly experimented
so far -> Not a strong requirement today
– Security of GNSS will be a critical issue in the future due
to increasing threats
– Some Defence UCs have highlighted that as civilian
User Communities will access to PRS signals, Need for a
better definition of the PRS receiver’s denial policy
• Interoperability:
– NATO Nations Defence UCs could use Galileo PRS as a
useful civil system in combination with GPS/PPS.
• Position & time-stamping:
• Need to provide proof in front of court of justice, e.g.
proving time of rescue.