Subsonus

Subsonus is a next-generation USBL/INS that provides high accuracy position, velocity and heading at depths of up to 1,000 meters.

Position Accuracy

0.1 m


Roll & Pitch

0.1 °


Acoustic Heading

0.3 °


Range & Depth

1,000 m

Subsonus is a miniature underwater acoustic positioning system that provides high accuracy position, velocity, and heading at ranges of up to 1000 meters. The USBL provides highly reliable tracking thanks to its advanced signal processing and unique hydrophone design. Subsonus also seamlessly operates as a modem capable of transmitting user data underwater.

Position Accuracy (5 m range)
0.1 m
Position Accuracy (100 m range)
0.5 m
Position Accuracy (1000 m range)
5.0 m
Velocity Accuracy
0.01 m/s
Roll and Pitch Accuracy
0.1 °
Heading Accuracy
0.3 °
Heave Accuracy
5% or 0.05 m (whichever is greater)
Internal Filter Rate
1000 Hz
Output Data Rate
up to 1000 Hz
Latency
0.6 ms

Hydrophones
8
Frequency
30 kHz (broadband)
Range
1000 m
Acoustic Coverage
300 ° hemispherical
Range Accuracy
0.1 % of slant range
Angular Accuracy
0.1 °
Update Rate
Up to 10 Hz

Integrated GNSS/INS
Yes
Integrated GNSS Antenna
On top of hydrophone array
Pressure Sensor Range
1,000 m
Pressure Sensor Accuracy
1.5 m

Operating Voltage
9 to 60 V or Power over Ethernet
Power Consumption (Average)
10 W
Power Consumption (Peak)
25 W
Interface
Ethernet (RS232/RS422 through ILU)
Timing Synchronization
PTP and NTP support
Depth Rating
1000 m
Operating Temperature
-20 °C to 40 °C
Storage Temperature
-40 °C to 85 °C
Shock Limit
25 g
Dimensions
106 x 106 x 93 mm
Weight in Air
1170 g
Weight in Water
650 g

Downloads

Datasheet

Version 3.2

18 Apr 2024

Reference Manual

Online Version

Version 2.3.1

14 Apr 2025

Performance Evaluation

Version 1.1

22 Jul 2016

3D Model

Version 1.0

22 Jul 2016

Bracket 3D Model

Version 1.0

22 Jul 2016

Subsonus Firmware

Version 3.7.1

24 Oct 2024

The latest firmware for all Subsonus hardware versions. This can be loaded onto Subsonus using the web browser interface. Subsonus firmware v3.0 or newer must be used with Subsonus Tag firmware v2.0. Refer to the release notes for further details.

Version 2.4

29 Oct 2020

Pre-version 3.0 firmware for all Subsonus hardware versions. This can be loaded onto Subsonus using the web browser interface. Subsonus firmware v2.4 must be used with Subsonus Tag firmware v1.4. Refer to the release notes for further details.

Subsonus SDK

Version 2.4

27 Oct 2020

The Subsonus SDK provides example source code for interfacing with Subsonus through the AN Packet Protocol. The languages provided are C/C++, Java, and .Net C#.

Subsonus Tools

Version 3.1

5 May 2023

Subsonus Tools is a utility for logging data and converting log files from Subsonus into CSV formats.

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