1.5.4GPS Performance
1.5.4.1Receiver
WAAS Enabled® GPS receiver continuously tracks and uses multiple satellites to compute and update your position.
1.5.4.2Acquisition Times
•Reacquisition: Less than 2 seconds
• | Hot: | Approx. 1 second (all data known) |
• | Warm: | Approx. 38 seconds (initial position, time, and almanac known; ephemeris unknown) |
• | Cold: | Approx. 45 seconds |
1.5.4.3Sentence Rate
1 second default; NMEA 0183 output interval configurable from 1 to 900 seconds in
1.5.4.4Accuracy
•GPS Standard Positioning Service (SPS)
Position: | <15 meters, 95% typical (100 meters with Selective Availability on) |
Velocity: | 0.1 knot RMS steady state |
•DGPS (USCG/RTCM)
Position: | |
Velocity: | 0.1 knot RMS steady state |
•DGPS (WAAS)
| Position: | <3 meters, 95% typical |
| Velocity: | 0.1 knot RMS steady state |
• | PPS Time: | ±1 microsecond at rising edge of PPS pulse (subject to Selective Availability) |
• | Dynamics: | 999 knots velocity (only limited at altitude greater than 60,000 feet), 3g dynamics |
1.5.5Interfaces
•True
•User selectable baud rate: 4800, 9600, 19200, or 38400.
1.5.5.1Port 1
•Configurable between NMEA 0183 Versions 2.00 (factory default) and 3.00
•ASCII output sentences GPALM, GPGGA, GPGLL, GPGSA, GPGSV, GPRMC, GPVTG (NMEA- approved sentences); PGRMB, PGRME, PGRMF, PGRMM, PGRMT, and PGRMV (Garmin proprietary sentences)
•NMEA 0183 Outputs (see section 4.2 Transmitted NMEA 0183 Sentences for full protocol specifications) o Position, velocity, and time
o Receiver and satellite status
o Differential Reference Station ID and RTCM Data age o Geometry and error estimates
•NMEA 0183 Inputs (see section 4.1 Received NMEA 0183 Sentences for full protocol specifications)
oInitial position, date, and time (not required)
oEarth datum and differential mode configuration command, PPS Enable, GPS satellite almanac
•Configurable for binary data output
1.5.5.2Port 2
GPS 16x Technical Specifications | Rev. A | |
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