Viceroy GPS Receiver
Superior positioning with 200+ years of on-orbit performance
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. The use of dual antennas for LEO enhances the performance and satellite visibility. Each of the 12 GPS channels can be assigned to either antenna. The design supports an RS-422 interface.
- 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
Features
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 35 VDC Operation
- Improved Radiation Hardened Digital Electronics
- 12 Channels Support All-in-View Tracking
- Dual Antenna – Any Channel Assigned to Either Antenna (LEO only)
- 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
Specifications
Viceroy-4 GPS Receiver Data Sheet
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View Document
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Receiver Architecture |
12 channels with enhanced fast acquisition |
Input/Output |
RS-422 serial I/O (standard) |
Solution Accuracy | Autonomous Position: < 15 meters, 1 sigma (LEO) | < 100 meters, 1 sigma (GEO) Autonomous Velocity: < 0.1 meters/second, 1 sigma (LEO) | < 0.01 meters/second, 1 sigma (GEO) 1PPS time: < 100 ns, 1 sigma (typical) |
Time to First Fix | LEO: 4 minutes, cold start GEO: 10 minutes, cold start |
Orbital Dynamics | Altitude: approx 200 km to 2000 km (LEO) | approx 35,800 km (GEO) Velocity: up to 16,000 meters/second Acceleration: 1G |
Optional and Custom Features | Single string or redundant configurations Precision internal reference Ovenized Crystal Oscillator (OCXO) External 10 MHz reference oscillator Time Strobe Input: < 100 ns, 1 sigma MEO and HEO Altitudes |
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: 8 W max; steady-state tracking (20-35 V) Vibration: 17 Grms Shock: 1750 G @ 500 Hz Temperature: -20°C to +60°C |
Literature
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Features
Features
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 35 VDC Operation
- Improved Radiation Hardened Digital Electronics
- 12 Channels Support All-in-View Tracking
- Dual Antenna – Any Channel Assigned to Either Antenna (LEO only)
- 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
-
Specifications
Specifications
Viceroy-4 GPS Receiver Data Sheet
View Document
Receiver Architecture 12 channels with enhanced fast acquisition
Dual antenna – any channel to either antenna (LEO only)
L1: 1575.42 MHz, C/A code
Carrier-aided code tracking
Based on legacy Viceroy architecture (hardware and software)
Kalman filter or least squares solutionInput/Output RS-422 serial I/O (standard)
X.25 protocol with ECEF position, velocity, time, longitude, latitude,
pseudorange, carrier phase
One pulse per second (GPS, UTC, or Measurement Epoch Time)
9-pin male Sub-D for prime power
37-pin female Sub-D for command and telemetry
SMA female connector for RF signalSolution Accuracy Autonomous Position: < 15 meters, 1 sigma (LEO) | < 100 meters, 1 sigma (GEO)
Autonomous Velocity: < 0.1 meters/second, 1 sigma (LEO) | < 0.01 meters/second, 1 sigma (GEO)
1PPS time: < 100 ns, 1 sigma (typical)Time to First Fix LEO: 4 minutes, cold start
GEO: 10 minutes, cold startOrbital Dynamics Altitude: approx 200 km to 2000 km (LEO) | approx 35,800 km (GEO)
Velocity: up to 16,000 meters/second
Acceleration: 1GOptional and Custom Features Single string or redundant configurations
Precision internal reference Ovenized Crystal Oscillator (OCXO)
External 10 MHz reference oscillator
Time Strobe Input: < 100 ns, 1 sigma
MEO and HEO AltitudesPhysical/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: 8 W max; steady-state tracking (20-35 V)
Vibration: 17 Grms
Shock: 1750 G @ 500 Hz
Temperature: -20°C to +60°C -
Literature
Literature