Jamming GNSS
Jamming GNSS
Posted Dec 17, 2024 23:04 UTC (Tue) by farnz (subscriber, #17727)In reply to: Jamming GNSS by Cyberax
Parent article: Providing precise time over the network
Given that paulj was on an airliner, and that effective GNSS jamming against a sophisticated military opponent has to have both a ground-based and an air-based component (else directional antenna pointed at the sky is a trivial fix for military users, given GNSS's wavelength is around 20cm), line of sight is not a significant effect here. A purely ground-based jammer would be limited by line of sight here, at about 500 km for airliner altitudes, but the aerial component of military jamming of GNSS means that the line of sight is much larger.