Alpha 4AR Visual RTK
Alpha 4AR is Alpha Surveying's most compact visual RTK receiver: 98 × 53 mm and 400 g. It tracks 7 satellite systems with 1408 channels and features a calibration-free IMU with tilt compensation from 0° to 90°.
Immersive AR stakeout combines design data with the live camera image: stakeout points are marked directly in the real scene and reached in one step, with 1 cm accuracy. The image-grade lens has minimal optical distortion.
A built-in transceiver radio (410–470 MHz), 4G modem, PPP and a 25.9 Wh battery with up to 12 hours of operation also make the 4AR a base station for drones where there is no network or CORS coverage. Dimap Pro field software covers topographic survey, road stakeout, power line survey, solar farm stakeout and earthwork calculation.
- Only 400 g and 98 × 53 mm
- AR stakeout on the live view, 1 cm accuracy
- 1408 channels, 7 satellite systems
- Calibration-free IMU, 0–90° compensation
- Built-in 410–470 MHz radio, 4G and PPP
- UAV base station; up to 12 h of operation
Price
Brochure
ALPHA 4AR VISUAL RTK
Download the official brochure for the full technical details.
- Weight
- 400 g
- Dimensions
- 98 × 53 mm
- Origin
- China
- Manufacturer
- Alpha Surveying
Technical data
| Channels | 1408 |
| Satellite systems | GPS · BDS · GLONASS · Galileo · QZSS · SBAS · NavIC |
| Static accuracy | H ±(2,5 + 0,5×10⁻⁶·D) mm · V ±(5 + 0,5×10⁻⁶·D) mm |
| RTK accuracy | H ±(8 + 1×10⁻⁶·D) mm · V ±(15 + 1×10⁻⁶·D) mm |
| Tilt compensation accuracy | ±(8 + 0,3·TILT) mm |
| Compensation angle | 0–90° |
| Update rate | 100 Hz |
| AR camera – resolution | 2 MP |
| AR camera – field of view | 68° |
| AR stakeout accuracy | 1 cm |
| Radio power | 1,5 W |
| Radio frequency | 410–470 MHz |
| Cellular network | 4G |
| Wi-Fi | 802.11 a/b/g/n/ac |
| Bluetooth | BT 5.0 |
| Operating system | Linux |
| Internal storage | 32 GB |
| Data recording | DAT · RINEX |
Device
| Dimensions | 98 × 53 mm |
| Weight | 400 g |
| Battery | 25,9 Wh |
| Working time (controller Ntrip) | 12 h |
| Power input | 5–12 V, PD |
| Ports | SMA · USB Type-C |
| Water/dust protection | IP67 |
| Operating temperature | −30 … +70 °C |
| Storage temperature | −40 … +80 °C |
| Pole drop onto hard ground | 1,6 m |
| Free fall | 1,2 m |
| Humidity | ≤ 100 % |
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