Hemisphere V104S

Heading Sensor Antenna

Brochures And Manuals


  • Hemisphere GNSS’ exclusive COAST™ technology
  • Crescent and Crescent VectorII technology
  • Tilt sensor on each axis (X and Y axes)
  • Dual integrated GPS antennas
  • V104s’s GPS antennas are separated by 13.5 cm between their phase centers, resulting in better than 2° rms heading performance.


 GPS Sensor Specification 

Receiver Type
Vector GPS L1 Compass
Two 12-channel, parallel tracking
(Two 10-channel when tracking SBAS)
SBAS Channels
2-channel, parallel tracking
Update Rate
10 Hz standard (position and heading)
Position Accuracy
Single Point: 1m(95%)
SBAS: 3m(95%)
Heading Accuracy
2° (RMS)
Heave Accuracy
<30cm (RMS)
Pitch/Roll Accuracy
2° (RMS)
Rate of Turn
90°/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)
Heading Fix
< 10 s typical (valid position)
Compass Safe Distance
30 cm (11.8 in)
Maximum Speed
1,850 kph (999 kts)
Maximum Altitude
18,288 m (60,000 ft)

 Communications Specification 

Serial Ports
2 full-duplex RS-232
Baud Rates
4800, 9600, 19200, 38400, 57600, 115200
Correction I/O protocol
Data I/O protocol
NMEA 0183, Crescent binary

 Power Specification 

Input Voltage
8 to 36 VDC
Power Consumption
~ 2 W nominal
Current Consumption
165 mA @ 12 VDC
Power Isolation
Isolated to enclosure
Reverse Polarity Protection

 Mechanical Specification 

UV resistant, white plastic, Geloy CR7520 (ASA)
Not Including Mount: 25.9 L x 12.9 W x 4.5 H (cm)
Including Mount: 25.9 L x 12.9 W x 12.8 H (cm)
0.42 kg (0.9 lb)(not including mount)
0.51 kg (1.1 lb) (Including mount)


Operating Temperature
30°C to +70°C (-22°F to +158°F)
Storage Temperature
-40°C to +85°C (-40°F to +185°F)
Water and Dust
100% non-condensing
IEC 60945
CE (IEC 60945 Emissions and Immunity) FCC Part 15, Subpart B CISPR22F
heading sensor, hemisphere, v104s