viDoc®

Technical Data

Included in delivery

> GNSS antenna (standard or performance)
> Front- & ground laser
> Charging cable
> User manual

The viDoc® is compatible with:

iPhone Pro or iPad Pro recommended.

iOS: Find out from your app provider which iPhones are supported and how, and whether compatibility with viDoc® is possible.

Android: Find out from your app provider which Android devices are supported and how, and whether compatibility with viDoc® is possible.

Unity: Find out from your app provider which Unity devices are supported and how, and whether compatibility with viDoc® is possible.

Note: Not every App (iOS / Android / Unity) is supported.

viDoc® Model 24

Measurements153 x 73 x 23 mm
Weight285 g
Temperature range–5 up to +35°C
Humidiy5 up to 95% (not condensing)

GNSS antenna standard

Measurements55.6 mm x 27.5 mm
Weight< 19g
Waterproof statusIP67
Operating temperature-40 up to +75 °C
Storage temperature-50 up to +80 °C
HumidiyUp to 95%
PolarizationRHCP
Satellite signalsGPS: L1/L2
BeiDou: B1/B2/B3
Galileo: El/E5b
GLONASS: G1/G2
Coverage360°
Supply voltage3 up to 16 VDC
Power consumption< 35 mA
LNA gain36 ± 2 dB
Noise figure< 2 dB
V.S.W.R. < 2.0
Measure angle10° = high precision
45° = low precision
90° = poor precision

GNSS antenna performance

Measurements55.6 mm x 27.5 mm
Weight< 19g
Waterproof statusIP67
Operating temperature-40 up to +75 °C
Storage temperature-50 up to +80 °C
HumidiyUp to 95%
PolarizationRHCP
Satellite signalsGPS: L1/L2
BeiDou: B1/B2/B3
Galileo: El/E5b
GLONASS: G1/G2
Coverage360°
Supply voltage3 up to 16 VDC
Power consumption< 35 mA
LNA gain40 ± 2 dB
Noise figure< 2 dB
V.S.W.R. < 2.0
Measure angle10° = high precision
45° = high precision
90° = high precision

Laser

Measurement accuracy± 3 mm
(depending on lighting conditions,
materials and angle of impact)
Angle accuracy absolute± 0.05°
Measuring rangeGround laser: 0.5 up to 30 m
Front laser: 0.5 up to 15 m
Acc. angle measurement /
skew measurement function
Ground laser (2 m): 20° = ± 2 cm //
30° = ± 3 cm // 45° = ± 5 cm
Front laser (5 m): 0–90° < 20 cm
Laser class2
Laser type635 nm, < 1 mW
Measurement times0.1 up to 4 sec.
Supply voltage2.5 up to 3.3 V
Operating temperature0 up to 40 °C

Performance specifications

Constellation-independent, flexible signal tracking, improved positioning under challenging environmental conditions2 with multi-satellite use. Reduced downtime in the event of loss of signal (up to 5 seconds).

The following satellite signals are used simultaneously:

GPS: L1C/A (1575.42 MHz); L2C (1227.60 MHz)

BeiDou: B1I (1561.098 MHz); B2I (1207.140 MHz)

Galileo: E1-B/C (1575.42 MHz); E5b (1207.140 MHz)

GLONASS:
L1OF (1602 MHz + k*562.5 kHz, k = –7,…, 5, 6)
L2OF (1246 MHz + k*437.5 kHz, k = –7,…, 5, 6)
QZSS

Positioning services3

Device typeMulti-band GNSS
high precision receiver
Accuracy of pulse signalsRMS 30 ns
99 % 60 ns
Frequencies of pulse signals0.25 Hz up to 10 MHz
Convergence timeRTK < 10 sec
Static survey
RTK position accuracy
Horizontal acc.: 1 cm + 1 ppm
Vertical acc.: 1 cm + 1 ppm
RTK run up/ramp up time4Cold start (sec) up to 90 sec
At operating temperature up to 8 sec
RMS5,6 measurement accuracy
(after system calibration, measured
with performance antenna)
Horizontal acc.: 5 mm at 15 min
Vertical acc.: 8 mm at 15 min
Horizontal acc.: 10 mm at 30 min
Vertical acc.: 15 mm at 30 min
Speed accuracy0.05 m/s
System limitsHeight: 5.000 m
Acceleration: < 4 g
Speed: 500 m/s
IMU6-axis sensor
16-bit digital, triaxial accelerometer
16-bit digital, triaxial gyroscope
and geomagnetic
Angle accuracy: < 0.3°
Scan rate: < 100 Hz
Temperature measurement: permanent
Acceleration rate: < 4 g
Sensitivity
temperature drift: ± 0.03 % / K
Gyroscope operating rate: < 250°/s

Power supply:
Operating times in continuous operation

Receive and transmitmax. 6 hours
With active laser modulemax. 5 hours
Under real conditionsmax. 6 hours
Battery packLiPo, 2 x 1,200 mAh,
7.4 Wh, 3.7 V

Model accuracy7
absolute position and height (relativ)

with control points< 1 cm
only via RTK positioning

< 5 cm

only with LIDAR (iOS)

< 10 cm

1 High precision = technical accuracy up to 1 cm
Low precision = susceptible to fluctuations due to external influences, susceptible to shading >180°
Poor precision = very susceptible to fluctuations due to external and internal influences

2 Challenging GNSS environments are places where there is sufficient satellite availability for the receiver as a prerequisite for minimum accuracy, but where the signal can be partially shaded or reflected by trees, buildings and other objects. The actual results may vary due to the location and atmospheric activitiy, due to strong flickering, the condition and availability of the satellite system and the degree of multipath scattering and signal coverage.

3 Precision and reliability can be affected by certain factors such as multipath scattering, obstacles, satellite geometry and atmospheric conditions. The stated specifications require stable setups, a clear view of the sky, an environment free of electromagnetic interference and multipath scattering, optimal GNSS configurations and, in addition, surveying methods as they are usually used for surveys of the highest order with occupation times adapted to the base lengths. Baselines over 30 km in length require ephemeris accuracy and occupation times of up to 24 hours may be necessary to achieve high-precision static specification.

4 Accuracies may be affected by atmospheric conditions, multipath signals, shadowing and satellite geometry. The reliability of the initialisation is permanently transmitted to ensure the highest quality. Compensations are solved on the software side.

5 RMS efficiency is based on repeatable on-site measurements. The achievable accuracy and the initialization time can vary depending on the type and performance data of the receiver and antenna, the geographic location of the user, atmospheric conditions, scintillation intensity, the status and availability of the GNSS constellation, the degree of multipath scatteing and the proximity to shading (e.g. from large trees and buildings) vary. Validation in different situations on site.

6 Measurement iterations based on 1 minute. Better position accuracy through error rate filtering.

7 The models were mapped with a viDoc® Rover and an iPhone15 Pro Max. The model accuracy depends on the environmental conditions and the calculation settings. Results after Postprocessing with an photogrammetry software.

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