UniStrong G990II High-Precision GNSS Receiver

UniStrong G990II High-Precision GNSS Receiver view 2

UniStrong

G990II High-Precision GNSS Receiver

IP67
Ingress Protection: 9-28V DC
Input Voltage

Original UniStrong unit·Authorized distributor

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Overview

About the G990II

Since its launch in 2012, the G990 has earned wide recognition from users for its outstanding performance. Inheriting the proven strengths of the G990, the G990II further optimizes its popular high-capacity battery and built-in UHF radio, integrates advanced IMU tilt compensation technology, and adds a color LCD touchscreen, representing the culmination of RTK technology. The G990II is powered by UniStrong's self-developed, next-generation Lyra II baseband chip. Built on a 55nm process, the chip features 1,100 all-compatible channels to process all-constellation, multi-frequency satellite signals, with comprehensive support for all BeiDou/GNSS signal structures. It also supports L-Band signal reception and satellite-based augmentation services. Featuring a new-generation smart IMU tilt survey system that requires no calibration, the G990II employs a high-precision 9-axis IMU module with a 400 Hz update rate and proprietary integrated navigation algorithms. Compared to traditional magnetic sensor tilt surveying, it is immune to magnetic interference, simple to operate, highly accurate, and significantly boosts work efficiency.

Specifications

Since its launch in 2012, the G990 has earned wide recognition from users for its outstanding performance. Inheriting the strengths of the G990, the G990II further optimizes and upgrades the well-received high-capacity battery and high-power internal UHF radio, incorporates modern IMU tilt compensation technology, and features a color LCD touchscreen, representing the culmination of RTK innovations. The G990II is equipped with UniStrong's self-developed next-generation Tianqin II baseband chip. Built on a 55nm process with 1100 fully compatible channels, this baseband chip processes all-constellation, all-frequency satellite signals and fully supports all BeiDou/GNSS signal structures. It also supports L-Band signal reception and satellite-based augmentation services. The next-generation intelligent IMU tilt survey system requires no calibration. Powered by a high-precision 9-axis IMU sensor with a 400MHz update rate and proprietary integrated navigation algorithms, it is immune to environmental magnetic interference, easy to operate, highly accurate, and significantly boosts operational efficiency compared to traditional magnetic tilt measurement.

All-Constellation Tracking and Precise Positioning

Featuring an all-constellation, all-frequency design compatible with BeiDou, GPS, GLONASS, and Galileo, with full support for BeiDou-3. The G990II is equipped with UniStrong's self-developed next-generation Tianqin II high-precision baseband chip, built on a 55nm process with 1100 fully compatible channels to support all BeiDou-3 signal structures.

Capsule Design 2.0

The G990II adopts a new-generation magnesium alloy capsule design with isolated internal compartments, physically separating the antenna, UHF radio, OEM board, and battery into independent microwave circuits to prevent electromagnetic interference and ensure signal quality. A specialized connector design eliminates internal cabling, ensuring stable and reliable signal transmission.

High-Power UHF Radio

The G990II features UniStrong's self-developed TRM600 high-power internal UHF radio with a peak power of 7W, increasing transmission range by 40% compared to the previous generation. It provides full-band support (410–470MHz) and is compatible with mainstream radio protocols (South, Hi-Target, PCC, Trimtalk, etc.). It also features channel detection to automatically select the optimal channel and forward error correction (FEC) to significantly reduce the bit error rate.

High-Capacity Battery and Fast Charging

Equipped with a 13600mAh high-performance battery pack and an industrial-grade smart battery management chip, the G990II effectively extends operating time and battery life. It features a reversible Type-C port compatible with PD fast charging protocols and comes standard with a 45W PD fast charger, allowing the large-capacity battery to be recharged quickly. It can also reverse-charge data controllers, laptops, smartphones, and other digital devices.

Specifications

Technical data

Values from the UniStrong datasheet. Ask us for the full sheet or a side by side with another model.

GNSS Performance

Channels: 800 (232 dedicated BeiDou channels)
Signal Tracking: GPS: L1C/A, L1C, L1P, L2C, L2P, L5 GLONASS: G1P1, G1OC, G2OC, G2P2, G3OC BDS: B1I, B2I, B3I, B1C, B2a, B2b, ACEBOC Galileo: E1BC, E5a, E5b, ALTBOC, E6 QZSS: L1C/A, L1C, L2C, L5, LEX SBAS: L1, L5 NavIC (IRNSS): L5 L-Band (Commercial PPP Service) Note: Bold indicates newly supported frequencies
Update Rate: 5Hz standard, 10Hz/20Hz/50Hz optional via license

Accuracy

Static Accuracy: Horizontal: ±(2.5 + 0.5 × 10^-6 D) mm Vertical: ±(5 + 0.5 × 10^-6 D) mm (D is the distance between measured points)
RTK Accuracy: Horizontal: ±(8 + 1 × 10^-6 D) mm Vertical: ±(15 + 1 × 10^-6 D) mm (D is the distance between measured points)
Tilt Compensation Accuracy: 2 cm (@30° tilt angle)

Electrical

Battery: Built-in non-removable battery, 7.2V/13600mAh, 97.92Wh
Operating Time: Up to 10 hours of typical operation at room temperature
Input Voltage: 9-28V DC

System Configuration

Operating System: RT-Linux 4.1.18
Internal Storage: 512MB LPDDR3, 32GB eMMC
MEMS: Tilt compensation technology, calibration-free
Bluetooth: Bluetooth 2.1+EDR / 4.0 dual-mode (Class 2)
Wi-Fi: 802.11 b/g/n
Internal UHF Radio: TRM600, 7W peak power
Protocols: TRIMTALK, TRIMMARK3, TRANSEOT (PCC-GMSK), GEOTALK, GEOMARK3, SATEL, SOUTH, HITARGET, HZSZ
Cellular Network: LTE FDD: B1/B3/B8 LTE TDD: B38/B39/B40/B41 TD-SCDMA: B34/B39 WCDMA: B1/B8 CDMA 1x/EVDO: BC0 GSM: 900/1800

Data Interface

Type-C Port: For direct charging and data transmission
5-pin Port: For connecting external power supply and external radio
SIM Card Slot: Nano SIM card slot, side-mounted, flip cover
TF Card Slot: None

Display

Display Screen: 1.45-inch color display
Display Screen: 360 x 250 resolution
Buttons: Short press once to broadcast current operating mode and status; Power button for powering on/off
LED Indicators: Satellite Indicator (Green) / Off: No satellites tracked; Flashing red: Satellites tracked but no position fix; Flashing green: Position fixed but not fixed RTK; Solid green: Fixed RTK solution; Alternating red/green flashing: GNSS OEM board exception
LED Indicators: Data Link Indicator (Green) / Solid green: Data link configured successfully; Flashing green: Data transmitting normally; Flashing blue: In static mode, flashes according to set static sampling interval
LED Indicators: Bluetooth Indicator / Solid: Device connected via Bluetooth; Off: No device connected
LED Indicators: Power Indicator (Red/Green dual-color) / Solid green: 30%-100% battery; Flashing green: 10%-30% battery; Flashing red: <10% battery with buzzer beeps
Voice: Multi-language recorded voice broadcasts

Physical Specifications

Dimensions: 154 mm (L) × 154 mm (W) × 76 mm (H)

Environmental

Operating Temperature: -45℃ to +75℃
Storage Temperature: -55℃ to +85℃
Ingress Protection: IP67
Drop: Withstands a 2 m pole drop onto hardwood floor at room temperature, 1.2 m free fall
Humidity: 100% condensing resistance