ARMORER Navigation · CRPA · EW v@armorer.org

Practice 01

Navigation.

An outage should be a degradation, not a mission stop.

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Also

FIG 02 Position error · GNSS outage
Horizontal position error through a GNSS outage Position error stays at about two metres until GNSS is lost at 120 seconds. Unaided inertial drift reaches several hundred metres by the end of the 300-second outage; with clock holdover and sensor aiding the same outage costs roughly thirty metres. Both recover once the signal returns. 0 150 300 450 600 1 10 100 1k GNSS DENIED m seconds
Unaided inertial drift against the same outage with clock holdover and aiding. AidedUnaided
Vulnerability assessment
What breaks, at what range, and what it costs the mission. Link budgets, J/S analysis, receiver acquisition and tracking thresholds.
Architecture
Inertial and clock aiding, coupling depth, alternative PNT, and what the platform actually does at the moment of loss.
Integrity
Detecting a wrong solution, not just a missing one. Consistency checks, thresholds, and what the crew is told.
Timing
Holdover budgets for fixed sites and platforms, stated against your real tolerance rather than a datasheet figure.

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