FA1, FA2, FA3 are the mobile units from the set of equipment for the high accuracy navigation system Farwater. They receive GLONASS, GPS and Galileo signals in the L1 band, correcting data from FBU and FA0. They produce the movement parameters (co-ordinates, speed) of the object in the real time and with the precession accuracy. It’s done in the RTK (Real Time Kinematic) mode.   

FA1, FA2, FA3 units consist of 1, 2 or 3 inbuilt receivers and the appropriate number of the external receiving antennas and the processor unit to produce high accuracy navigation solution based on the primary data from the internal receivers and the correcting information from the Base Station.

FA1 provides only co-ordinates and the speed of the object.

FA2 provides plane orientation data (course) in addition.

FA3 provides complete orientation information for the object.

Each mobile unit is equipped with the VHF, GSM/GPRS or Wi-Fi modem depending on the selected link type.

Technical data:

Number of receivers/antennas:FA1FA2FA3





Co-ordinate accuracy

0,01-0,03 m 

Orientation accuracy  (FA2, FA3)

better than 1° 

Co-ordinate system

WGS-84 or customer’s

Power Supply

9-30  VDC

Power Consumption

< 5 Вт

Wake-up time :  -Cold start

-Warm start

-Hot start

– High accuracy solution

90 s

50 s

10 s

200 s

The frequency of the precession solution output

1 – 10 Hz

Link to the base unit


Dimensions: – Main unit – Antenna GNSS

135×86×36 mm

Ø 67 mm, h – 15 mm

Weight: – Main unit

– Antenna GNSS

0,3 kg

0,15 kg