FOG North Finder with 0.3°Accuracy True Finder with RS422 Interface

Fiber Optic Gyroscope North Finder offers precise true-north orientation for navigation, mapping, and weapon guidance systems. The unit automatically detects the Earth’s rotational rate and computes accurate azimuth and attitude data within 3 minutes.
This all-in-one device integrates a high-accuracy FOG, accelerometer, motorized turntable, and embedded computer. With ≤0.3° north-seeking accuracy and ≤0.05° horizontal accuracy, it ensures stable and repeatable performance.
Operating on DC 12–24 V power and rated for -40 °C to +70 °C, the ≤2 kg system provides durable, high-efficiency north-finding for UAVs, armored vehicles, and surveying equipment.

Overall dimensions

Dimension (mm): 115 × 90 × 110

1.2 Main technical indicators

A) North seeking time: ≤ 3 min;

B) North seeking accuracy (1σ): ≤ 0.3 ° (NF701A); ≤ 0.5 ° (NF701B)

C) Horizontal accuracy: ≤ 0.05 ° (1σ);

D) Circumference: ≤ 0.5 ° (1σ)

E) Weight: ≤ 2 kg;

F) Power supply: DC 12V ~ 24V;

G) Power consumption: 15 W (peak);

H) Interface: RS422

I) Working mode: start automatic self-check after power on, control north seeking by the upper computer, and send north seeking results to the upper computer after north seeking is completed;

1.3 Environmental requirements

1) Working temperature: -40 ℃ ~ + 70 ℃;

2) Storage temperature: -55 ℃ ~ + 85 ℃.

3) Humid and hot environmental conditions: relative humidity is less than 95%.

4) Appearance: The metal surface shall be free of rust, and the coating shall be free of blistering, peeling, etc.

1.4 Electrical performance

Insulation resistance: the insulation resistance between the independent circuits of the fiber optic gyroscope north finder and between the circuit and the shell shall not be less than 10 MΩ under standard atmospheric conditions.

1.5 Reliability and maintainability

MTBF ≥ 1000 hours;

MTTR ≤30min.

1.6 External interface

1.6.1 With DC12 V ~ 24V power input.

1.6.2 With serial port output function.

1.8.3 External plug:

Interface Y50EX-0607TX2, see the table below for pin definition.