ALPS 2


The body of the G4 is made of AZ91D magnesium alloy, which has high strength and excellent heat dissipation. The surface is sprayed with metallic paint, which makes the G4's body resistant to scratches, impacts, and rust.

The top cover of the G4 is made of polycarbonate by one-piece molding. It has good fire resistance and anti-deformation properties. GNSS signal will be received evenly from all directions.


Image 1
Channels1698
GPSL1, L1C, L2C, L2P, L5
GLONASSG1,G2,G3
BDSB1I,B2I,B3L,B1C,B2A,B2B,ACEBOC
GALILEOE1,E5A,E5B,E6
SBASL1C,L1A*,L5
NavIC/ IRNSSL5
QZSSL1,L2C,L5
MSSL - BandBDS-PPP, GALILEO-HAS
Positioning output rate1Hz~20Hz
Initialization time< 10s
Initialization reliability>99.99%
Code differential GNSSHorizontal: 0.25 m + 1 ppm RMS Vertical: 0.50 m + 1 ppm RMS
Static(long observations)Horizontal: 2.5 mm + 0.1 ppm RMS Vertical: 3 mm + 0.4 ppm RMS
StaticHorizontal: 2.5 mm + 0.1 ppm RMS Vertical: 3.5 mm + 0.4 ppm RMS
Rapid staticHorizontal: 2.5 mm + 0.5 ppm RMS Vertical: 5 mm + 0.5 ppm RMS
PPKHorizontal: 3 mm + 1 ppm RMS Vertical: 5 mm + 1 ppm RMS
RTK(UHF)Horizontal: 8 mm + 1 ppm RMS Vertical: 15 mm + 1 ppm RMS
RTK(NTRIP)Horizontal: 8 mm + 0.5 ppm RMS Vertical: 15 mm + 0.5 ppm RMS
RTK initialization time2 ~ 8s
SBAS positioningTypically < 5m 3DRMS
BANDA-LHorizontal: 5-10cm (5-30min) Vertical: 10-30cm (5-30min)
IMULess than 10mm + 0.7 mm/° tilt to 30°
IMU tilt angle0° ~ 60°
Dimension135mm(W)×135mm(L)×84.75mm(H)
Weight890g(battery included)
MaterialMagnesium aluminum alloy shell
Operating temperature-40℃~+65℃
Storage temperature-35℃~+80℃
Humidity100% Non-condensing
Waterproof/DustproofIP68
Shock/VibrationMIL-STD-810G(withstand 2meters pole drop onto the cement ground naturally)
Power supply6-28V DC, over voltage protection
BatteryInbuilt 7.4V 6800mAh rechargeable Li-ion battery
Battery life*1Typically 20h(static), 9h(Base+UHF) 19h(Rover+UHF), 20h(Rover+Bluetooth), 19h(Rover+Cellular Network)
I/O Port5-PIN LEMO external power port + RS232 Type-C(charge+USB+OTG+Ethernet) 1 UHF antenna interface
Internal UHF2W Radio receiver and transmitter
Frequency range410-470MHz
Communication protocolFarlink, Trimtalk, SOUTH, HUACE, Hi-target, Satel
Communication rangeTypically 5km with Farlink protocol, up to 12km
BluetoothBluetooth5.0 standard,Bluetooth2.1+EDR
NFC CommunicationRealizing close range (shorter than 10cm) automatic pair between receiver and controller(controller requires NFC wireless communication module else)
Cellular4G
Modem802.11 b/g standard
WIFI hot spotReceiver broadcasts its hot spot form web UI accessing with any mobile terminals
WIFI datalinkReceiver can transmit and receive correction data stream via WiFi datalink
Storage4GB SSD internal storage standard, extendable up to 128GB Automatic cycle storage(The earliest data files will be removed automatically while the memory is not enough) Support external USB storage The customizable sample interval is up to 20Hz
Data transmissionPlug and play mode of USB data transmission Supports FTP/HTTP data download
Data formatStatic data format:STH,Rinex2.01,Rinex3.02,etc. Differential data format:CMR,CMR+,RTCM2.1, RTCM2.3,RTCM3.0,RTCM3.1,RTCM3.2(recommended) GPS out put data format:NMEA0183,PJK plane coordinate,Binary code Network model support:VRS,FKP,MAC,Fully support NTRIP protocol
Electronic bubbleController software can display electronic bubble, checking leveling status of the carbon pole in real-time
IMUBuilt-in IMU module, calibration-free and immue to magnetic interference
ThermometerBuilt-in thermometer sensor, adopting intelligent temperature control technology, monitoring and adjusting the receiver temperature
Operating systemLinux
ButtonsSingle button
Indicators4LED indicators
Web interactionWith the access of the internal web interface management via WiFi or USB connection, users are able to monitor the receiver status and change the configurations freely
Voice guidanceIt provides status and operation voice guidance, and supports Chinese/English/Korean/Spanish/Portuguese/Russian/Turkish
Secondary developmentProvides secondary development package, and opens the OpenSIC observation data format and interaction interface definition
Cloud serviceThe powerful cloud platform provides online services like remote manage, firmware update, online register and etc
Alps 2 Brochure Download