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Appendix B: Specifications

Table B-1 through Table B-5 provide the V102’s GPS sensor, communication,

power, mechanical, and environmental specifications.

Table B-1: GPS sensor specifications

Item Specification

Receiver type L1, C/A code with carrier phase smoothing

Channels Two 12-channel, parallel tracking

(Two 10-channel when tracking SBAS)

SBAS tracking 2-channel, parallel tracking

Update rate Standard 10 Hz, optional 20 Hz (position and

heading)

Horizontal accuracy

< 1.0 m 95% confidence (DGPS

)

< 2.5 m 95% confidence (autonomous, no SA

)

Heading accuracy < 0.75° rms

Normal operation: GPS

Coasting (no GPS): Gyro

Heave accuracy

< 30 cm rms

Normal operation: GPS

Coasting (no GPS): None

Pitch accuracy < 1.5° rms

Normal operation: GPS

Coasting (no GPS): Inertial sensor

Roll accuracy < 1.5° rms using accelerometer

Normal operation: Inertial sensor

Coasting (no GPS): Inertial sensor

Rate of turn

°/s maximum

Cold start < 60 s typical (no almanac or RTC)

Warm start < 20 s typical (almanac and RTC)

Hot start < 1 s typical (almanac, RTC, and position)

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Directed Electronics VS102 Guía de usuario Pagina 51