Precise applications demand the heading and positioning performance of the Crescent VS100 Series GPS Compass. Ideal for professional machine control and navigation applications, the Crescent VS100 delivers reliable accuracy at significantly less cost than competitors products or traditional methods. The Crescent VS100 receiver with its display and user interface can be conveniently
installed near the operator. The two antennas are mounted separately and with a distance between them to meet the desired accuracy.

GPS Sensor Specifications

Receiver Type: L1, C/A code, with carrier phase smoothing
Channels: Two 12-channel, parallel tracking
(Two 10-channel when tracking SBAS)
Update Rate: Standard 10 Hz, optional 20 Hz (position
and heading)
Horizontal Accuracy:
< 0.6 m 95% confidence (DGPS)*
< 2.5 m 95% confidence (autonomous, no SA)**
Heading Accuracy:
< 0.25o rms @ 0.5 m antenna separation
< 0.15o rms @ 1.0 m antenna separation
< 0.10o rms @ 2.0 m antenna separation
Pitch / Roll Accuracy:
< 1 o rms @ 0.5 m antenna separation
Rate of Turn: 90o / s max
Start up Time: < 60 s typical
Heading Fix: < 20 s
Satellite Reacquisition: < 1 s
Antenna Input Impedance: 50Ω
Beacon Sensor Specifications (VS110 version)
Channels: 2-channel, parallel tracking
Frequency Range: 283.5 to 325 kHz
Operating Modes: Automatic (signal strength or range)
and manual
Compliance: IEC 61108-4 beacon standard

Communications

Serial ports: 2 full duplex
Interface Level: RS-232C
Baud Rates: 4800 - 57600
Correction I/O Protocol:
RTCM SC-104, L-Dif (Hemisphere GPS proprietary)
Data I/O Protocol: NMEA 0183, Crescent binary, L-Dif
(Hemisphere GPS proprietary)
Timing Output: 1 PPS (HCMOS, active high,
rising edge sync, 10 kΩ, 10 pF load)
1 PPS Accuracy: 50 ns

Power

Input Voltage: 9 to 36 VDC
Power Consumption: < 4 W
Current Consumption: < 360 mA @ 12 VDC
Antenna Voltage Output: 5 VDC
Antenna Short Circuit Protection: Yes

Environmental

Operating Temperature: -30°C to +70°C (-22°F to +158°F)
Storage Temperature: -40°C to +85°C (-40°F to +185°F)
Humidity: 95% non-condensing

Mechanical

Dimensions: 189 mm L x 114 mm W x 71 mm H
(7.4” L x 4.5” W x 2.8” H)
Weight: 0.86 kg (1.9 lb)
Status Indication: Power, primary GPS lock, secondary GPS
lock, differential lock, and heading lock
Power Switch: Miniature push-button
Power Connector: 2-pin, micro-Conxall
Data Connectors: DB9-female
Antenna Connectors: TNC-male

Aiding Devices

Gyro: Single axis gyro provides reliable <1o heading for periods up to 3 minutes when loss of GPS lock has occurred
Tilt Sensor: Assists in fast start up of RTK solution
* Depends on multipath environment, number of satellites in view, satellite geometry, baseline length (for local services), and ionospheric activity
** Depends on multipath environment, number of satellites in
view, and satellite geometry