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Chapter 1: Introduction

Overview

The V102™ GPS Compass is based upon Hemisphere GPS’ exclusive

Crescent

and Crescent Vector™ II technology

The V102 is a complete GPS compass and positioning system in a single

enclosure that requires only one power/data cable connection. With its CAN

support and ease of installation, the V102 is the perfect solution for both

marine and land-based applications such as mine construction, earthworks

and machine guidance.

The V102 is an integrated system that houses the following:

• Crescent and Crescent Vector II technology

• Dual integrated GPS antennas

• Power supply

• Single axis gyro

• Tilt sensor on each axis (X and Y axes)

The gyro and tilt sensors are present to improve system performance and to

provide backup heading information in the event that a GPS heading is not

available due to signal blockage.

Crescent Vector II technology supports multiple RF front ends - enabling

tighter coupling of measurements from separate antennas for use in

heading-based products. Users will achieve excellent accuracy and stability

due to Crescent’s more accurate code phase measurements, improved

multipath mitigation, and fewer components.

The V102’s GPS antennas are separated by 27.5 cm between their phase

centers, resulting in better than 0.75° rms heading performance. The V102

provides heading and positioning updates of up to 20 Hz and delivers

positioning accuracy of better than 1.0 m 95% of the time when using

differential GPS corrections from Space Based Augmentation Systems

(SBAS).

The V102 also features Hemisphere GPS’ exclusive COAST™ technology that

enables Hemisphere GPS receivers to utilize old differential GPS correction

data for up to 40 minutes without significantly affecting the positioning

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Directed Electronics VS102 Guía de usuario Pagina 7