viDoc® for Tablet.
Included items
viDoc® for Tablet with RTK feature
GNSS-Antenna
Box
viDoc® for Tablet
| Height | 253 mm |
| Width | 184 mm |
| Depth | 29 mm |
| Weight | 484 g |
| Temperature range | -5 to +35 °C |
| Humidity | 5 – 95 % (non-condensing) |
GNSS Antenna
| Width | 55.6 mm | |
| Diameter | 27.5 mm | |
| Weight | < 19 g | |
| Temperature range | - 40 to + 80 °C | |
| Humidity | up to 95 % | |
| Polarization | RHCP | |
| Satellite signals |
GPS: L1/L2; GLONASS:G1/G2; Beidou: B1/B2/B3;Galileo:El/E5b |
|
| Coverage | 360° | |
| Supply voltage | 3 - 16 VDC | |
| Power Consumption | < 35 mA | |
| Gain | 36 ± 2 dB | |
| Noise figure | < 1.5 dB | |
| V.S.W.R. | < 2.0 | |
| Coverage | 360° | |
| Supply voltage | 3 - 16 VDC | |
| Power Consumption | < 35 mA |
Laser
| Measurement accuracy | ± 2 mm |
| Measuring range | 0.5 to 40 m |
| Laser class | 2 |
| Laser type | 635 nm, < 1 mW |
| Measuring times | 0.1 to 4 sec. |
| Supply voltage | 2.5 – 3.3 V |
| Operating temperature | 0 to 40 °C |
Performance Specifications
Constellation-independent, flexible signal tracking, improved positioning under challenging environmental conditions1 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 services2
| Device type | Multi-band GNSS high precision receiver | |
| Accuracy of the pulse signals |
RMS 30 ns 99 % 60 ns |
|
| Frequencies of pulse signals | 0.25 Hz to10 MHz | |
| Convergence time | RTK < 10 sec. | |
| Static survey |
POSITION 1 cm + 1 ppm HEIGHT 1 cm + 1 ppm |
|
| RTK-startup time3 |
Cold start (Sec.) 24 sec. At operating temperature 2 sec. |
|
|
RTK position accuracy RMS 4,5 (repeatability for static measurement) |
POSITION 7 mm at 15 min HEIGHT 8 mm at 15 min POSITION 15 mm at 30 min HEIGHT 21 mm at 30 min |
|
| Speed accuracy | 0.05 m/s | |
| System limits |
Height 5,000 m Acceleration < 4 g Speed 500 m/s |
|
| IMU | Prepared |
Power supply
| iPad operating times in continuous operation: | |
| Receive and send | 8 h max |
| With active laser module | 6 h max |
| under real conditions | 8 h max |
| Battery pack | LiPo, 2 x 3,200 mAh, 7.4 Wh, 3.7 V |
Model accuracy 6
absolute position and height
| with EXIF data | < 10 cm |
| with CSV data | < 10 cm |
| with CSV + GCP data | < 2 cm |
| with EXIF + GCP data in cloud processing | < 2 cm |
1 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 observation site and atmospheric activity, due to strong flickering, the condition and availability of the satellite system and the degree of multipath scattering and signal coverage.
2 Precision and reliability may be affected by certain factors such as multipath propagation, obstacles, satellite geometry and atmospheric conditions. The stated specifications require stable setups, a clear view of the sky, an environment free from electromagnetic interference and multipath propagation, optimal GNSS configurations and, in addition, ssurveying 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.
3 May be influenced by atmospheric conditions, multipath signals, shading and satellite geometry. The reliability of initialisation is permanently monitored to ensure the highest quality.
4 RMS efficiency is based on repeatable on-site measurements. The achievable accuracy and the initialisation time may vary depending on the type and performance of the receiver and antenna, the geographical location of the user, atmospheric conditions, scintillation intensity, the state and availability of the GNSS constellation, the degree of multipath scatteing and the proximity of shading (e.g. by large trees and buildings).
5 Measurement iterations based on 1 minute. Better position accuracy through error rate filtering.
6 The models were mapped with Vigram Rover and an iPhone 11. Model accuracy depends on environmental conditions and calculation settings. Results may vary depending on the software provider.
