Superior Positioning With 100+ Years Of On Orbit Performance

The Viceroy GPS Spaceborne Receiver has the most on orbit heritage of any commercial GPS Receiver on the market. The Viceroy provides position, velocity and time information for low Earth orbiting satellites. The Viceroy's low signal acquisition and tracking supports geo-synchronous Earth orbit (GEO) side lobe tracking.

  • Design based on legacy space qualified digital design
  • 20 years of trouble-free spaceflight heritage
  • Same reliable position, velocity, time, pseudorange and carrier phase at 1Hz
  • Same form-factor and interface control as heritage Viceroy receiver

Product Details


General Dynamics’ Viceroy™-4 Global Positioning System (GPS) Spaceborne Receiver provides position, velocity, and time information for Low Earth Orbit (LEO) and Geostationary Earth Orbit (GEO) applications. Performance and satellite visibility are enhanced through the use of dual antennas; each of the 18 GPS channels can be assigned to either antenna. The design supports RS-422 or MILSTD-1553 bus interfaces.

  • Space Qualified Digital Design
  • Full Spaceborne Capability
  • Autonomous Operation
  • Pseudorange and Integrated Carrier Phase at One Second Rate
  • One PPS Clock Output Synchronized to GPS Time
  • Radiation Hardened Static RAM
  • Up to 12 Receive Tracking Channels
  • 53 Cubic Inches
  • 2.4 Pounds
  • 20 to 34 VDC Operation
  • Improved Radiation Hardened Digital Electronics
  • 12 Channels Support All-in-View Tracking
  • Dual Antenna – Any Channel Assigned to Either Antenna
  • Fast Cold Start Mode Simplifies Integration and Autonomous Operation
  • Low Signal Acquisition and Tracking Supports GEO Sidelobe Tracking
  • Enhanced Resolution 1 Pulse per Second Output
  • Time-Strobe Input



Viceroy-4 GPS Receiver Data Sheet



View Document


Receiver Architecture 12 channels with enhanced fast acquisition
Dual antenna – any channel to either antenna
L1: 1575.42 MHz, C/A code
Carrier-aided code tracking
Based on legacy Viceroy architecture (hardware and software)
Input/Output RS-422 serial I/O (standard)
MIL-STD-1553B (optional)
X.25 protocol with ECEF position, velocity, time, longitude, latitude,
pseudorange, carrier phase
One pulse per second (GPS, UTC, or Measurement Epoch Time)
Time strobe input signal
9-pin male Sub-D for prime power
37-pin female Sub-D for command and telemetry
Solution Accuracy Autonomous Position: < 15 meters, 1 sigma
Autonomous Velocity: < 0.05 meters/second, 1 sigma
1PPS time: < 100 ns, 1 sigma
Time to First Fix 60 seconds, cold start
Orbital Dynamics Altitude: LEO to GEO (200 km – 45,000 km)
Velocity: up to 16,000 meters/second
Acceleration: 1G
Optional and Custom Features Serial Port – 1553 or standard RS422
Code Types: L1 C/A
Kalman filter or least squares solution
Single string or redundant configurations
Low signal acquisition and tracking to 20 dB-Hz (GEO side lobes)
Precision internal reference Ovenized Crystal Oscillator (OCXO)
External 10 MHz reference oscillator
Time Strobe Input: <100 ns, 1 sigma
Antenna Active microstrip patch antenna (LEO), 0.4 lbs
High gain multi-element antenna (GEO), 1.0 lb
Power supplied by Viceroy-4
SMA female connection on receiver and antenna
Physical/Environmental Size: 6.0” x 5.2” x 1.7” (152 x 132 x 43 mm)
Weight: 2.4 lbs (1.1 kg) max
DC Power: 7 W max; steady-state tracking (20-34 V)
Vibration: 17 Grms
Shock: 1750 G @ 500 Hz
Temperature: -20°C to +60°C