Seiwa Si-Tex Vector 3D GPS - Manual (Page 4)

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Chapter 1: Introduction
Overview
Note: Throughout this manual, the Vector 3D GPS Compass is referred to simply as the 3D.
The 3D 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 3D is the perfect solution
for both marine and land base applications such as mine construction, earthworks and machine guidance.
The 3D is an integrated system that houses the following:
• Crescent Vector II technology
• Dual integrated GPS antennas
• Power supply
• Single axis gyro
• Tilt sensors (two)
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 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 3D’s GPS antennas are separated by 27 cm between their phase centers, resulting in better than 0.60°
rms heading performance. The 3D 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 3D GPS receivers may utilize old differential GPS correction data for 40 minutes or more without
significantly affecting the positioning quality. The 3D is less likely to be affected by differential signal
outages due to signal blockages, weak signals, or interference when using COAST.
If you are new to GPS and SBAS, refer to the GPS Technical Reference for further information on these
services and technologies before proceeding.
Parts List
Note: The 3D’s parts comply with IEC 60945 Section 4.4: “exposed to the weather.”
Part Name Qty Part Number
3D receiver 1 31210010
Power/data cable, 15 m (accessory item)* 1 31110053
Serial-to-NMEA 2000 adapter 1 31210011
SI-TEX Tool Kit CD 1 29030052
User Manual 1 29010087
Table 1-1: Parts list
*Note: if 3D system Part number 11210029 was ordered, use cable part number
31110052 for serial adapter 31210011, rather than cable part number 31110053.