Description
📝 Product Overview
The Fugro GPS2 SeaStar 3100 LRS Receiver is a high-performance, marine-grade Differential GPS (DGPS) receiver engineered to deliver sub-meter positioning accuracy for offshore survey, dynamic positioning (DP), and hydrographic operations. By decoding decimeter-level real-time differential corrections from the SeaStar satellite network via its L-band RF tracking module, this system ensures reliable, drift-free navigation data even in challenging marine environments.
⚙️ Technical Specifications
- 📐 Dimensions: 220 mm x 165 mm x 54 mm (Standard 1U half-rack width chassis)
- ⚖️ Weight: 1.45 kg
- 🌍 Country of Origin: Netherlands / Norway
🚢 Applications
- Offshore dynamic positioning (DP) reference tracking
- Hydrographic survey and marine mapping vessels
- Commercial dredging and pipelaying barge guidance
- Integrated shipboard bridge navigation system verification
🛠️ Usage Instructions
- Ensure the external L-band/GPS antenna has an unobstructed, 360-degree clear sky view to prevent multi-path interference.
- Check the front panel LCD screen status to confirm that the receiver has locked onto the correct geostationary SeaStar communication satellite.
- Use the data interface menu to select the proper output sentence format (typically NMEA-0183 GGA, VTG, or ZDA) requested by your onboard software.
- Do not hot-plug the coaxial antenna RF connector while the receiver unit is fully powered up.
🔧 Mechanical Installation Requirements
- Fixing Method: Flush mounted into a standard 19-inch navigation rack using specialized shelf brackets, or surface mounted horizontally using base flanges.
- Space Clearance: Maintain a minimum 60 mm envelope depth at the rear of the unit to prevent straining the coaxial RF cables and data D-sub adapters.
- Heat Dissipation: Avoid stacking the receiver directly between high-power radio transmitters; ensure ambient console air stays below 50°C.
🔌 Electrical Wiring Guide
- Terminal Definitions: * Terminals 1-2: Primary DC Power Input (9V DC to 36V DC wide range, +/-)
- TNC Connector: Low-noise active antenna input port (supplies 5V DC bias)
- DB9 Port 1: RS-232 Primary NMEA Position Output
- DB9 Port 2: RS-232 Differential Correction Input / RTCM Interface
- Grounding Stud: Rear panel M4 threaded brass chassis bonding post
- Wire Gauge: Use minimum 1.0 mm² (18 AWG) multi-strand copper cable for the DC power infrastructure, and double-shielded RG-214 or LMR-400 coaxial cables for RF runs.
- Grounding Norms: Connect the rear chassis ground stud directly via a low-resistance green/yellow cable to the central vessel instrumentation ground matrix to isolate RF noise.
📡 Communication Configuration
- IP Address: Not applicable on this legacy LRS serial platform. External network mapping requires an auxiliary serial-to-Ethernet bridge.
- Station ID: Hardcoded hardware electronic identification number (Hex ID / User Code) used for over-the-air subscription activation via the SeaStar service desk.
- Baud Rate: User-configurable via front buttons for both DB9 data ports; defaults to 9600 bps or 19200 bps with 8 data bits, 1 stop bit, and no parity.
❓ Frequently Asked Questions (Q&A)
- Q: What should I check if the receiver status shows “No Corrections”?
- A: Verify your current geographical location against the coverage footprint of the selected L-band satellite, inspect the antenna line for moisture ingress, and check that your SeaStar subscription is active.
- Q: Can the SeaStar 3100 LRS run on a 12V or 24V battery bank directly?
- A: Yes, its internal switching regulator natively handles a broad power input window from 9V up to 36V DC without modifications.
- Q: Why is the position accuracy fluctuating during heavy rainstorms?
- A: Severe rain fade can attenuate L-band satellite signals. If tracking is lost momentarily, the receiver will smoothly fall back to standard autonomous GPS mode until the carrier lock is re-established.
