GNSS Interference Report
Issued: 3 months, 3 weeks ago
| Date | Reference | Region | Category | Aggressors | Source |
| 22 Jan 2024 - 21:20 | CW GNSS 171 | Indian Ocean | GNSS Interference | NAVCEN | |
|---|---|---|---|---|---|
| USER: -At 23/01/2024 15:20:00LMT an alarm sounded on No2 GPS stating (no position fixing) and a message appeared stating that it was unsafe for navigation. During the time of first alarm 12 satellites were observed to be tracked. After 30 minutes and when the gps signal totally lost, observed that 0 satellites were tracked. No1 GPS was still properly working with no alarms and safe navigation indication was enabled. After 30 to 40 minutes the same alarm of no position fixing sounded also on No1 GPS and the position from ECDIS monitor appeared to be on land 50 - 60nm off original psn. The issue commenced at 23/01/2024 15:20:00LMT and lasted until 24/01/2024 00:00:00LMT. Positioning from LAT: 16.900 N & LONG: 040.900 E until LAT: 18.700 N & LONG: 040.3 E. According to the above, GPS loss signal is described as spoofing, both equipment was still on but unable to receive any signal from satellites. NAVCEN: The GPS Operations Center reviewed the GPS Constellation and Control Segment, there are no known anomalies that might affect GPS signal integrity at the time and vicinity of the reported problem. Space weather was reviewed and found unlikely to have impacted GPS performance. There were no authorized GPS tests in the area. No correlating reports from inter-agency partners. No additional information. | |||||