Oscar
ProBase
RTK GNSS Base Station
Powerful correction broadcasts.
A wider working area.
Deliver RTK corrections to the field with an internal 5 W UHF radio and 4G connectivity. Oscar ProBase is designed for base-station work, with replaceable batteries and a rugged housing.
Internal UHF radio
Selectable 1 / 2 / 5 W transmit power.
Correction transmission
Long-range radio communications under suitable field conditions.[2]
Operation with two batteries
Total operating time while transmitting at 5 W.[3]
Multi-GNSS tracking
GPS, GLONASS, BeiDou, Galileo and QZSS.
OLED display
Configure radio and network settings on the device.
Industrial protection
Water- and dust-resistant housing for field use.
Set up the base station.
Broadcast corrections.
Oscar ProBase's internal UHF radio reduces the need for an external radio. Transmit RTK corrections to compatible rovers in the 410–470 MHz band at up to 5 W output power.[2]
Choose the connection
for your site.
Broadcast corrections through the internal radio or configure network base-station mode using the 4G module.
Local UHF broadcast
Deliver corrections to field rovers by radio. Select channel, protocol and power settings for your installation.
Network broadcast over 4G
Transfer corrections over the network using NTRIP, TCS or TCP. Select the internet connection and service configuration for your project.
Control at hand.
Power with you.
Manage daily base-station operation with easy on-device configuration and removable batteries.
1.54-inch OLED display.
Configure radio and network settings on screen. Monitor satellites, correction data and power status on the device.
Two batteries, extended operation.
Two 7.4 V / 6400 mAh batteries provide up to 14 hours total operation while transmitting at 5 W.[3]
Your reference in the field.
Multi-constellation tracking, ExtremeRTK™ technology and an industrial housing support reference-station measurements and correction generation.
Multi-constellation tracking
Track signals from different GNSS systems with 576 channels and deliver corrections to your survey workflow.
IP68 housing
Protection against dust and water, a −40 °C to +70 °C operating range and resistance to a 2 m pole drop onto concrete.
Onboard recording
Record GNSS data in 8 GB of storage. Use RINEX and other supported outputs in office workflows.
One reference.
Compatible field systems.
Build base-station infrastructure for survey teams and drone workflows using NTRIP. Confirm connection protocols, correction formats and coordinate-system compatibility during setup.
Define the base point
Enter reference coordinates and antenna height in the project coordinate system.
Select the broadcast mode
Configure correction transmission over UHF or the internet.
Check the rover connection
Verify correction age, solution status and coordinates on the compatible receiver.
Technical specifications.
Explore Oscar ProBase positioning, connectivity and hardware specifications.
GNSS and signal tracking
| Channel count | 576 |
|---|---|
| GPS | L1, L2, L5 |
| GLONASS | L1, L2 |
| BeiDou | B1I, B2I, B3I, B1C, B2a |
| Galileo | E1, E5a, E5b |
| QZSS | L1, L2, L5 |
| Data update rate | 20 Hz |
Positioning performance
| RTK accuracy (RMS) | Horizontal: 8 mm + 1 ppm Vertical: 15 mm + 1 ppm |
|---|---|
| Network RTK accuracy (RMS) | Horizontal: 8 mm + 0.5 ppm Vertical: 15 mm + 0.5 ppm |
| High-precision static (RMS) | Horizontal: 2.5 mm + 0.1 ppm Vertical: 3.5 mm + 0.4 ppm |
| Static / fast static (RMS) | Horizontal: 2.5 mm + 0.5 ppm Vertical: 5 mm + 0.5 ppm |
| PPK accuracy (RMS) | Horizontal: 2.5 mm + 1 ppm Vertical: 5 mm + 1 ppm |
| DGPS accuracy (RMS) | Horizontal: 0.25 m Vertical: 0.5 m |
| Single-point accuracy (RMS) | Horizontal: 1.5 m Vertical: 2.5 m |
| Initialisation time | Typically 4 seconds.[1] |
| Time to first fix (TTFF) | Cold start: <30 seconds Warm start: <5 seconds |
| Signal reacquisition | <1 second |
| Time / velocity accuracy (RMS) | 20 ns / 0.03 m/s |
| Initialisation reliability | >99.9% |
Internal radio
| UHF frequency range | 410–470 MHz |
|---|---|
| Radio output power | 1 / 2 / 5 W |
| Operating mode | Half-duplex |
| Channel spacing | 25 kHz |
| Modulation | GMSK |
| Radio data rate | 9600 / 19200 bps |
| Radio protocols | TrimTalk450, TrimMark 3, South, Transparent, Satel |
| Range | Technical table: typically >8 km; up to 15 km under suitable field conditions.[2] |
Connection
| Cellular connectivity | 4G LTE / WCDMA / GSM |
|---|---|
| Network protocols | NTRIP Client, NTRIP Server, TCP, Tersus Caster Service (TCS) |
| Wi-Fi | 802.11 b/g |
| Bluetooth | 4.1 |
| NFC | Supported |
| USB | USB 2.0 OTG × 1 |
| Serial port | RS232 × 1 |
| Serial port data rate | Up to 921600 bps |
System and data
| Operating system | Linux |
|---|---|
| Internal storage | 8 GB |
| Differential data formats | CMR, RTCM 2.x / 3.x |
| Data output | RINEX, NMEA-0183, Tersus Binary |
| Field software | Tersus NUWA |
Battery and power
| Input voltage | 9–28 V DC |
|---|---|
| Battery | 7.4 V / 6400 mAh × 2 |
| Operating time | Up to 14 hours total with two batteries in 5 W radio mode.[3] |
| Typical power consumption | ≈5 W in network or radio reception ≈8 W at 1 W transmission · ≈9 W at 2 W · ≈11 W at 5 W |
| Charging temperature | +10 °C to +45 °C |
| Power indicator | Supported |
Physical specifications
| Display | 1.54-inch OLED |
|---|---|
| Dimensions | 157 × 157 × 103 mm |
| Weight | Approximately 1.2 kg without batteries / 1.4 kg with batteries |
| Protection rating | IP68 |
| Operating temperature | −40 °C to +70 °C |
| Storage temperature | −55 °C to +85 °C |
| Relative humidity | 100%, non-condensing |
| Drop resistance | 2 m pole drop onto concrete |
| Vibration resistance | MIL-STD-810G, FIG 514.6C-1 |
| Buttons | FN and power |
| LED indicators | Satellite, static, correction data and power |
- Accuracy and initialisation times depend on satellite visibility, satellite geometry, multipath, atmospheric and survey conditions. ppm is the baseline-dependent error component; 1 ppm equals 1 mm per kilometre.
- Radio range depends on terrain, antenna height, line of sight and the radio environment. The 15 km value is not a fixed range achievable at every site.
- Battery life varies with operating mode, ambient temperature and battery condition. Dimensions and weight may vary with manufacturing processes and measurement methods.
Product information is based on the Atay Mühendislik page. Tersus product information.
Complete your workflow.
Access relevant setup and operating resources.
RTK settings with a drone
Explore Atay's GNSS and drone connection guide.
Open PDF Guide ↗Oscar ProBase resources
Access datasheets and equipment lists on the manufacturer's page.
Open Manufacturer Resources ↗Choose your base station
for your project.
Request Oscar ProBase product information, a demo and a quotation. Let us select hardware, connectivity and software options for your surveying work.