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V4e & V4e Pro Specifications

Galaxy System

BDS (Beidou)
  B1I, B2I, B3I, B1C, B2a, B2b* 
GPS
  L1 C/A, L2P, L5
GLONASS 

G1, G2

Galileo
  E1, E5a, E5b, E6* 
QZSS
   L1, L2, L5
SBAS
   L1 C/A
Channels 
  1408
*Supported firmware versions coming soon

Data Types

Differential Data Formats
  RTCM 2.3, RTCM 3.x, CMR
Output Data Format 
  NMEA-018

Precision and Reliability

Signal Reacquisition Time
  ≤ 1 s
Time to First Fix (TTFF)

Cold start: ≤30 s, Hot start: ≤ 5 s

GNSS Initialization Time 
< 5 s
Initialization Data Reliability 
  > 99.9%
Data Update Rate 
   Measurement & Positioning:

1 Hz, 2 Hz, 5 Hz, 10 Hz, 20 Hz

Single Point Solution Accuracy (RMS)
 H ≤ 1.5 m, V ≤ 2.5 m
DGPS (RMS) 

H ≤ 0.4 m, V≤ 0.8 m

GNSS (RMS) 

H ≤ 0.8 cm + 1 ppm, V ≤1 .5 cm + 1 ppm

Time Accuracy (RMS) 
20 ns
Speed Accuracy (RMS)
  0.03 m/s
Laser Tilt Measurement Accuracy (V4e Pro)
 ≤ 3 cm error at 3 m distance 
(θ ≤ 30°) 
Tilt Measurement Accuracy (V4e Pro) 
  3D error ≤ 2.5 cm (θ ≤ 30°) 
3D error ≤ 3.5 cm (θ ≤ 60°) 

Electrical and Interface Parameters

Charging Specs
5V/2A
Power Consumption
  ≤ 1.5 W
Electrical Interface
  USB 2.0 Type-C
Charging Time 
    ≤ 3 h

Physical Characteristics

Shell Material
  PC+ABS
Buttons
 On/Off
Operating Temperature
  -20℃ to 60℃
Dimensions 
   182 x 53 x 53 mm
Mounting Interface
   1/4 thread internal interface
Indicator Lights
  Fixed disassembly & charging
Charging Temperature 
0℃ to 45℃

Communication

BT 4.0

Dual-mode

Working distance: 5 m

Wi-Fi (Base Station Mode)

2.4 G

Working distance: 300 m (base station protocol)