GPS GSM tracker module of high Performance, Low Price 1.Chipset ... Size: 25.4*25.4*3. GPS GSM tracker module with Low Price, High Performance, International Approvals, Prompt Delivery, ... DGPS corrected. 4).Time 1 microsecond synchronized to GPS time. 5.Datum:Default:WGS-84.6.Acquisition ... the pulse positive edge 4).Measurements Aligned to GPS second, ±1 microsecond 12. Environmental Characteristics: 1 ...