Abstract: A GNSS enabled device configured to process pulse per second (PPS) signals, in particular from a GNSS satellite constellation to determine a global position of the GNSS enabled device. The device comprises a GNSS receiver module configured to acquire the PPS signals, a computing unit, and a reference timer comprising a local reference clock and a timer circuit to measure periods of said PPS signals. The computing unit and reference timer are configured to measure a variance in jitter of said PPS signals to determine whether the received PPS signal is genuine or spoofed.

Abstract: A comfort band is configured to be worn between an electronic surveillance bracelet and a leg of a wearer. The comfort band includes a tubular elastic element adapted to retain the comfort band on the leg of the wearer. The comfort band further includes a cushion provided along a lower edge of the elastic element so that the cushion is located towards the foot of the wearer. The cushion extends outwardly from the elastic element and is arranged so as to form an abutment for an end face of the electronic surveillance bracelet.