Current GPS/GNSS monitor stations cost many thousands of dollars yet the latest low- cost (~$100 USD) GPS/GNSS receiver provide measurements across multiple satellite navigation constellations and ...

Ionosphere maps could make GPS more accurate All of this could ... anomaly over South Asia that went unnoticed by the few monitoring stations in the area. “When we first achieved the resolution ...

He cut off his GPS monitor and left it behind at the train station that evening. Before he was arrested by the U.S. Marshals Service on Oct. 3, cellphone and bank records show Blevins made several ...

The case raises questions about how effectively the Probation Department is supervising pretrial defendants at a time when judges increasingly turn to GPS monitoring as an alternative to jail.