Garmin GPS 25 LP Technical Specification

Garmin GPS 25 LP Technical Specification Manual pdf 8 page image

41.4.4 Performance1) Tracks up to 12 satellites (up to 11 with PPS active)2) Update rate: 1 second3) Acquisition time- 15 seconds warm (all data known)- 45 seconds cold (initial position, time and almanac known, ephemeris unknown)- 1.5 minutes AutoLocateTM (almanac known, initial position and time unknown)- 5 minutes search the sky (no data known)4) Position accuracy:Differential GPS (DGPS): Less than 5 meters RMSNon-differential GPS: 15 meters RMS (100 meters with Selective Availability on)5) Velocity accuracy: 0.2 m/s RMS steady state (subject to Selective Availability)6) Dynamics: 999 knots velocity, 6g dynamics7) One-pulse-per-second accuracy: ±1 microsecond at rising edge of PPS pulse(subject to Selective Availability)1.4.5 Interfaces1) Dual channel CMOS/TTL level (-xVC versions) or RS-232 compatible level (-xVSversions), with user selectable baud rate (300, 600,1200, 2400, 4800, 9600,19200)2) NMEA 0183 Version 2.0 ASCII output (GPALM, GPGGA, GPGSA, GPGSV,GPRMC, GPVTG, PGRME, PGRMT, PGRMV, PGRMF, LCGLL, LCVTG)Inputs- Initial position, date and time (not required)- Earth datum and differential mode configuration command, PPS Enable,almanacOutputs- Position, velocity and time- Receiver and satellite status- Differential Reference Station ID and RTCM Data age- Geometry and error estimates3) Real-time Differential Correction input (RTCM SC-104 message types 1,2,3 and 9)4) One-pulse-per-second timing output5) Optional binary TTL output data format6) Binary Format Phase Data