GPS RTK GNSS Trimble R4s

GNSS CHARACTERISTICS

240 GNSS channels

– GPS LIC/A, LIP(Y), L2P(Y), L2C
– GLONASS LIC/A, L2C/A, L3

-BeiDou Bl (phase 2), B2

-Galileo El, E5b

-Qzss LIC/A, L2C, Ll SAIF – SBAS LIC/A
-L-band

-Supports Trimble RTX real-time correction services

-Patented Z-Blade technology for optimal GNSS performance

-Full utilization of signals from all 6 GNSS systems

(GPS, GLONASS, BeiDou, Galileo, Qzss and SBAS)

-Enhanced GNSS-centric algorithm for fully independent GNSS tracking and optimal data processing (Incl. GPS-only and GLONASS-only)

-Fast search engine for quick acquisition and reacquisition of GNSS signals

-Patented SBAS ranging (code & carrier observations)

-Patented Strobe Correlator for reduced GNSS multi-path

-Up to 10 Hz real-time raw data output

-Supported data formats: ATOM, CMR, CMR+, RTCM

2.1, 3.0, 3.1 and 3.2(lncl. MSM), CMRx and sCMRx

-NMEA 0183 message output

REAL-TIME ACCURACY (RMS) 1 2

SBAS (WAAS/EGNOS/MSAS/GAGAN)

Horizontal: < 50 cm

Vertical:     < 85 cm

Real-time DGPS position

Horizontal:      25 cm + 1 ppm

Vertical:          50 cm + 1 ppm

Real-time Kinematic position (RTK)

Horizontal:  8 mm + 1 ppm

Vertical:   15 mm + 1 ppm

Real-time performance

Instant-RTK initialization

Typically 2 sec for baselines < 20 km

Up to 99,9% reliability

RTK initialization range: over 40 km

POST-PROCESSING ACCURACY (RMS) 12

Static & Fast static

Horizontal:       3 mm + ppm

Vertical:           5 mm + ppm

High-precision Static 3

Horizontal:       3 mm + ppm

Vertical:       3,5 mm +     ppm

Post-processed Kinematic (PPK)

Horizontal:      8 mm + 1 ppm

Vertical:        15 mm + 1 ppm

DATA LOGGING CHARACTERISTICS

Recording interval O, 1 – 999 seconds

PHYSICAL CHARACTERISTICS
Size                21 x 21 x 7 cm

Weight            930 g

User Interface

Five LED’s – Power, Tracking, BlueTooth, Recording and

Radio operation

I/O Interface

RS-232 serial link

USB 2.0/UART and USB OTG

Bluetooth 2.1 + EDR / Long range: Class 1 (19dbm)

Memory

256 Mb internal memory NAND Flash

30+ Days of 15 sec raw GNSS Data (14 Satellites)

Operation

RTK base & rover

RTK VRS network rover

NTRIP, Direct IP

Post-processing

Trimble RTX (satellite and cellular / IP)

Environmental characteristics

Operating temperature: -40°C to +65°c ⁴

Storage temperature:  -40°C to +85°c⁵

Humidity: 100% condensing

IP67 waterproof (sealed against sand & dust)

Drop:2m Pole-drop on concrete

Shock: MIL STD 810 (fig. 516.5-10) (01/2000)

Vibration: MIL STD 810 (fig. 516.5-10) (01/2000)

Power characteristics

Li-on battery, 7,4V / 2600 mAh

Battery life: 10 hrs (GNSS On ; UHF Rx Off)

8 hrs (GNss On ; UHF Rx on)

External DC power: 9 – 28V

Standard system components

Trimble R4s GNSS receiver

Li-on battery

Dual battery charger, power supply & cord kit

Tape measure (3,6m)

7cm Pole extension

USB to mini-USB comm cable

R4s internal UHF Kit (410-470 MHz, 2W, TRx)

2 Year receiver warranty

Trimble TSC3 Data collector

Trimble ACCESS field software

Optional system components R4s Field power kit

R4s Office power kit

1.Accuracy and TTFF specifications may be affected by atmospheric
conditions, signal multipath, satellite geometry and corrections
availability and quality.

2.Performance values assume minimum of five satellites, following the
procedures recommended in the product manual. High multipath
areas, high PDOP values and periods of severe atmospheric
conditions may degrade performance.

3.Long baselines, long occupations, precise ephemeris used

4.At very high temperatures UHF module should not be used in the
transmitter mode. With UHF transmitter on radiating 2W of RF power,
the operating temperature is limited to + 55°C

5.Without batteries. Batteries can be stored up to +70°C.

6.Receiver initialization time varies based on GNSS constellation
health, level of multipath, and proximity to obstructions such as large
trees and buildings.