Trimble R8 Model 4 GNSS Receiver The receiver incorporates a GNSS antenna, receiver, internal radio with a transmit option or an internal GSM module, and a battery in a rugged light-weight unit that is ideally suited as an all-onthe-pole RTK rover. Three LEDs allow you to monitor the satellite tracking, radio reception, data logging status, and power. Bluetooth wirelesstechnology provides cable-free communications between receiver and controller.
- The circuitry in the Trimble R8 Model 4 GNSS receiver provides up to 440 channels for satellite tracking, and supports logging raw GNSS observables to the internal receiver memory or to a handheld controller for postprocessed applications.
The receiver is available as a standalone rover, base station, or as part of the GNSS Total Station® system, offering maximum versatility in the system configuration to meet your specific requirements.
The receivers provide the following features:
- Future-proof Trimble 360 technology (Trimble R8 Model 4), which includes advanced Trimble Maxwell 6 Custom Survey GNSS chips with 440 channels and allows the receiver to track the following:
- GPS: L1 C/A, L1C, L2C, L2E, L5
- GLONASS: L1 C/A, L1P, L2 C/A, L2P, L3
- Galileo: E1, E5A, E5B
- BeiDou (COMPASS): B1, B2
- SBAS: QZSS, WAAS, EGNOS, GAGAS
- Centimeter-accuracy, real-time positioning with RTK/OTF data, up to 20 Hz position updates (R8 Model 4) or up to 10 Hz (R6 Model 4 and R4 Model 3)
- Submeter-accuracy, real-time positioning using pseudorange corrections
- Automatic OTF (on-the-fly) initialization while moving
- Single Lithium-ion rechargeable battery
- Cable-free Bluetooth communications with Trimble controllers
- Two RS-232 serial ports for:
- Trimble Format (CMR, CMR+™ and CMRx) input and output
- RTCM SC-104 input and output (RTCM 2.1, 2.3, 3.0, 3.1)
- 23 NMEA outputs
- GSOF, RT17, and RT27 outputs
- Supports BINEX and smoothed carrier
- One TNC radio antenna connector
- Internal memory for data storage
Specifications:
Feature |
Specification |
Size |
19.0 cm (7.5") wide x 10.4 cm (4.1") deep including connectors |
Weight: with internal battery, radio, and standard antenna |
1.52 kg (3.35 lbs) |
Operating times on internal 2.6 Ah battery (varies with temperature) |
450 MHZ receive only - 5 hours 450 MHz receive/transmit: 2.5 hours (varies with wireless data rate) GSM: 4.7 hours |
Power input |
11–28 V DC with over-voltage protection on port 1 (7-pin lemo) |
Operating temperature |
–40 °C to +65 °C (–40 °F to +149 °F) |
Storage temperature |
–40 °C to +75 °C (–40 °F to +167 °F) |
Humidity |
100% condensing, unit fully sealed |
Casing |
Water/dustproof IP67 dustproof, protected from temporary immersion to depth of 1 m (3.28 ft) |
Positioning specifications |
Feature |
Specification |
Positioning performance |
Code differential GNSS positioning |
Horizontal: 0.25 m + 1ppm RMS Vertical: 0.50 m + 1ppm RMS SBAS differential positioning accuracy: typically <5 m 3DRMS |
Static GNSS surveying |
High-precision static |
Horizontal |
3 mm + 0.1 ppm RMS |
Vertical |
3.5 mm + 0.4 ppm RMS |
Static and FastStatic |
Horizontal |
3 mm + 0.5 ppm RMS |
Vertical |
5 mm + 0.5 ppm RMS |
Kinematic surveying |
Postprocessed Kinematic (PPK) GNSS surveying |
Horizontal |
8 mm + 1 ppm RMS |
Vertical |
15 mm + 1 ppm RMS |
Real-Time Kinematic Surveying |
Horizontal |
8 mm + 1 ppm RMS |
Vertical |
15 mm + 1 ppm RMS |
Network RTK |
Horizontal |
8 mm + 0.5 ppm RMS |
Vertical |
15 mm + 0.5 ppm RMS |
Initialization time |
typically < 8 seconds |
Initialization reliability |
typically > 99.9% |
Technical specifications |
Tracking: |
Trimble R8 Model 4 GNSS receiver Advanced Trimble Maxwell 6 Custom Survey GNSS chips with 440 channels. Satellites simultaneously tracked:
- GPS: L1 C/A, L1C, L2C, L2E, L5
- GLONASS: L1 C/A, L1P, L2 C/A, L2P, L3
- Galileo: E1, E5A, E5B
- BeiDou (COMPASS): B1, B2
- SBAS: QZSS, WAAS, EGNOS, GAGAN
|
Signal processing |
Advanced Trimble Maxwell 6 Custom Survey GNSS chip Very low-noise GNSS carrier phase measurements with <1 mm precision in a 1 Hz bandwidth Multipath suppression |
Start-up |
Cold start: < 60 seconds from power on Warm start: < 30 seconds with recent ephemeris |
Initialization |
Automatic while moving or static |
Initialization time |
Typically < 8 seconds |
Initialization reliability |
Typically >99.9% |
Communications |
Two RS-232 serial ports (Port 1, Port 2) Baud Rates up to 115,200 bps RTS/CTS flow control negotiation supported on port 2 Bluetooth communications through Trimble controller with Bluetooth support |
Configuration |
Through user-definable application files or GPS Configurator |
Output formats |
NMEA-0183: AVR; BPQ; DP; DTM; GBS; GGA; GGK; GLL; GNS; GRS; GSA; GST; GSV; HDT; LLQ; PJK; PJT; RMC, ROT; VGK; VHD; VTG; ZDA GSOF (Trimble Binary Streamed Output) RT17 and RT27 outputs, BINEX and smoothed carrier |
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