Oscar TAPUltimate
GNSS Receiver with Satellite Corrections
Receive corrections from satellites.
Achieve precise positioning in the field.
Oscar TAP Ultimate works with L-band satellite corrections and calibration-free tilt compensation. Using TAP, it supports centimetre-level positioning without a local base station or CORS connection.[1]
TAP positioning accuracy
TAP accuracy stated on the Atay product page.[1]
TAP convergence time
Time to achieve a precise satellite-based solution.[1]
Tilt compensation within 60°
Calibration-free IMU resistant to magnetic interference.[2]
Operation with two batteries
Total operating time in network or rover radio mode.[3]
Internal storage
Record GNSS measurements on the device.
Rugged housing
Industrial construction protected against dust and water.
Satellite-delivered corrections.
Centimetre-level positioning.
TAP is a precise point positioning service that delivers satellite orbit and clock corrections over L-band. It supports surveying in areas with weak network coverage when satellite visibility is suitable.
Operation independent of a local base
TAP corrections do not require a nearby RTK base station or connection to a CORS network. Check service activation and convergence before surveying.
Backup internet delivery
Alongside satellite corrections, internet delivery may be available within the service.
Receive corrections.
Monitor the solution.
Evaluate receiver setup, service status and convergence together in satellite-based PPP workflows.
Prepare the service
Configure TAP activation and receiver settings for fieldwork.
Ensure satellite visibility
Position the receiver appropriately and check L-band corrections and GNSS signal tracking.
Monitor convergence
Begin surveying once a precise solution is established and monitor positioning quality throughout the work.
Survey without keeping the pole
vertical at every point.
The tilt sensor resists magnetic interference and provides flexibility at points where the pole cannot be held vertically. Stated accuracy for tilted measurements within 60° is ≤2 cm.[2]
Around obstacles
Survey with a tilted pole beside objects that make vertical placement difficult.
Hard-to-reach points
With suitable satellite visibility, reach details where vertical pole placement is difficult.
Infrastructure details
Adjust pole placement to the working area during outdoor infrastructure surveys.
Manage settings
on the device.
Configure the device through its 1.54-inch OLED display. Monitor GNSS tracking, correction data and power status, and maintain surveying workflows with 4G, internal UHF, Wi-Fi and Bluetooth.
The field equipment you need,
together.
Removable batteries and protected connection compartments are designed for daily transport and operation.
Extended operation with two batteries.
7.4 V / 6400 mAh batteries provide up to 16 hours total use in network or rover radio mode.[3]
Flexible data connectivity.
Connect to different field systems using the internal 410–470 MHz UHF radio, 4G, USB OTG and RS232.
From surveying
to project data.
Record GNSS data in internal memory and transfer it to office workflows in supported formats. Manage field operations with NUWA or a compatible FieldGenius configuration.
Multiple satellite systems
576 channels; GPS, GLONASS, BeiDou, Galileo, QZSS and SBAS signal support.
Data exchange
RINEX, NMEA-0183 and Tersus Binary outputs; CMR / CMR+ and RTCM correction formats.
Aerial and ground surveys
Survey ground control points and combine GNSS and drone data in the same project according to coordinate-system, format and connection compatibility.
Technical specifications.
Explore Oscar TAP Ultimate positioning, connectivity and hardware specifications.
TAP service
| Technology | Satellite-based precise point positioning (PPP) |
|---|---|
| Correction source | Satellite delivery over L-band; backup internet delivery option |
| Positioning accuracy | <5 cm[1] |
| Convergence time | 15 minutes[1] |
| Coverage | Global; subject to suitable satellite visibility |
| Local base / CORS requirement | Not required when using TAP |
| Service use | Activation and service scope are determined during quotation. |
GNSS and signal tracking
| Channel count | 576 |
|---|---|
| GPS | L1 C/A, L2C, L2P, L5 |
| GLONASS | L1 C/A, L2 C/A |
| BeiDou | B1, B2, B3 |
| Galileo | E1, E5a, E5b |
| QZSS | L1 C/A, L1C, L2C, L5 |
| SBAS | EGNOS, WAAS, MSAS, GAGAN; L1 C/A |
| Data update rate | 20 Hz |
Positioning and tilt
| RTK accuracy (RMS) | Horizontal: 8 mm + 1 ppm Vertical: 15 mm + 1 ppm |
|---|---|
| High-precision static (RMS) | Horizontal: 2.5 mm + 0.1 ppm Vertical: 3.5 mm + 0.4 ppm |
| Static / fast static / kinematic (RMS) | Horizontal: 2.5 mm + 0.5 ppm Vertical: 5 mm + 0.5 ppm |
| DGPS accuracy (RMS) | Horizontal: 0.25 m Vertical: 0.5 m |
| SBAS differential accuracy (RMS) | Horizontal: 0.6 m Vertical: 1.2 m |
| Single-point accuracy (RMS) | Horizontal: 1.5 m Vertical: 3.0 m |
| RTK initialisation | Typically <10 seconds; reliability >99.9% |
| Time to first fix (TTFF) | Cold start: <35 seconds Warm start: <10 seconds |
| Signal reacquisition | <1 second |
| Tilt compensation | ≤2 cm within 60°; calibration-free sensor resistant to magnetic interference.[2] |
| Time / velocity accuracy (RMS) | 20 ns / 0.03 m/s |
System and data
| Operating system | Linux |
|---|---|
| Internal storage | 16 GB |
| Differential data formats | CMR, CMR+, RTCM 2.x / 3.x |
| Network model support | DGPS, VRS, FKP, MAC |
| Data output | RINEX, NMEA-0183, Tersus Binary |
| Software support | Tersus NUWA, MicroSurvey FieldGenius |
Connection
| Cellular connectivity | 4G LTE / TD-SCDMA / WCDMA / GPRS / 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 |
Internal radio
| UHF frequency range | 410–470 MHz |
|---|---|
| Radio output power | 0.5 / 1 / 2 W |
| Operating mode | Half-duplex |
| Channel spacing | 12.5 / 25 kHz |
| Modulation | GMSK, 4FSK |
| Radio data rate | 4800 / 9600 / 19200 bps |
| Radio protocols | TrimTalk450, TrimMark 3, South, Transparent, Satel |
| Typical communication distance | >5 km; subject to field and antenna conditions. |
Battery and power
| Input voltage | 9–28 V DC |
|---|---|
| Battery | 7.4 V / 6400 mAh × 2 |
| Total operating time | Up to 16 hours with two batteries in network or rover radio mode.[3] |
| Typical power consumption | ≈5 W in network or radio reception ≈8 W at 0.5 W transmission · ≈9 W at 1 W · ≈11 W at 2 W |
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 |
| Antenna IGS/NGS code | TRSOSCAREU |
- TAP accuracy and 15-minute convergence information refer to the Oscar TAP Ultimate configuration on the Atay page. Performance depends on service activation, satellite visibility, atmospheric conditions and convergence. PPP convergence differs from RTK initialisation time.
- 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. The ≤2 cm tilt value applies within 60°; the tilt sensor does not provide independent positioning indoors without satellite signals.
- Battery life varies with operating mode, ambient temperature and battery condition. Dimensions and weight may vary with manufacturing processes and measurement methods.
This page is based on the 576-channel Oscar TAP Ultimate configuration offered by Atay. Other hardware versions may appear on the manufacturer's general Oscar page. Tersus product information.
Complete your workflow.
Access relevant setup and operating resources.
RTK settings with a drone
Explore Atay's setup guide for GNSS and drone connections.
Open PDF Guide ↗TAP and hardware selection
Select service activation, hardware version and software options for your surveying work.
Contact ATAY ↗Bring satellite corrections
into your fieldwork.
Request Oscar TAP Ultimate product information, a demo and a quotation. Let us select hardware, connectivity and software options for your surveying work.