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 |
|
