GPS jamming exercises
The Ministry of Defence conducts occasional tests on military systems, which may result in some loss of service to civilian users of the Global Positioning System (GPS) including in-car navigation devices and networks which rely on GPS signals.
Ofcom seeks to provide citizens and consumers with information about possible interruptions to these services. It must be emphasised that this notification process only warns of future jamming exercises that are brought to the notice of Ofcom and may not cover all jamming exercises. It cannot be assumed that any loss of service is due to jamming exercises.
If you have any queries regarding these notices, please forward them to InfoGPS.Notices@ofcom.org.uk.
Dates: The exercise will run over the period 6th September – 4th October 2021.
Location: Jammers will be located within 3 miles from N54° 50.34’ W004° 55.81’ (British National Grid reference NX119533)
Times: 08:30 – 16:00.
Frequencies: 1560 – 1609 MHz, 1212 – 1252 MHz
Worst case areas of effect against a receiver:
- 2m AMSL - Up to 7 km (4 nm), directional.
- 25m AMSL - Up to 20 km (11 nm), directional.
- 70m AMSL - Up to 40 km (22 nm), directional.
- 5,000ft AMSL – Up to 50 km (27 nm) in all directions.
- 10,000ft AMSL – Up to 90 km (49 nm) in all directions.
- 20,000ft AMSL – Up to 90 km (49 nm) in all directions.
- 30,000ft AMSL – Up to 90 km (49 nm) in all directions.
- 40,000ft AMSL – Up to 90 km (49 nm) in all directions