The Spirent/GSS Global Systems STR4500 is a 12-channel GPS/SBAS signal simulator engineered for development, qualification, production testing, and field validation of GPS-based navigation, tracking, and timing systems. It generates GPS L1 C/A code and SBAS signals (WAAS, EGNOS, MSAS) to emulate real-world satellite conditions during static, dynamic, and kinematic scenarios, including high-speed maneuvers and complex multipath environments.
Technical Specifications
Signal Generation
• L1 C/A code and SBAS signal generation
• 12 independent signal channels with zero interchannel bias
• Nominal signal level: −130 dBm (L1 C/A code)
• Signal level control: +15/−20 dB range, 0.5 dB resolution, ±1.0 dB RSS accuracy
Dynamic Performance
• Maximum velocity: ±15,000 m/s
• Maximum acceleration: ±450 m/s²
• Maximum jerk: ±500 m/s³
Signal Accuracy (RMS, 1-minute average)
• Pseudorange: ±10 cm
• Pseudorange rate: ±1 cm/s
• Delta-pseudorange: ±5 mm
Signal Quality
• Spurious: −30 dBc maximum
• Harmonics: −35 dBc maximum
• Phase noise: 0.02 rad RMS (SSB, 10 Hz–10 kHz offset)
• Frequency stability: ±5 × 10⁻¹⁰ per day (post warm-up)
Power Requirements
• Simulator unit: 100–264 V, 48–62 Hz, 70 W maximum
• PC controller: 115/230 V, 50/60 Hz
– Key Features
• Multi-constellation, multi-frequency scenario playback with multipath and multi-vehicle simulation
• Spirent SimPLEX software control (pre-installed on compatible Windows PC)
• Pre-prepared simulations for diverse vehicle types; custom scenario generation supported
• Real-time signal generation emulating actual satellite reception during intricate maneuvers
– Typical Applications
• GPS receiver development and qualification
• Production testing of navigation and timing equipment
• Field validation of SBAS-augmented systems
• High-dynamics platform testing
– Compatibility & Integration
• RF output: BNC connector
• External trigger, reference, and 1PPS synchronization inputs/outputs via BNC
• PC control via serial port
• RTCM-SC104 differential corrections via serial port
