Acoustic INS aiding - NASNet® & PHINS

Date/Time:

13 Mar 2012
16:30-17:00

Location:

South Galleries

Seminar Details
Inertial Navigation Systems (INS) are becoming increasingly common as part of subsea positioning spreads, particularly in deeper waters. Typically INS is used to try and compensate for the long standing stability limitations of conventional Ultra-Short Baseline (USBL) acoustic systems and update rates for Long Baseline (LBL) systems, while also providing a short term safety net against total loss of 'absolute' positioning systems. This paper looks at the integration of the Nautronix NASNet® LBL system with IXSEA's PHINS unit. The paper discusses the challenges along with the pros and cons of INS aiding using each of acoustic positions and acoustic ranges allowing a 'sparse' acoustic solution to provide high quality aiding. The paper also presents field trial results of NASNet®/PHINS integration to demonstrate the performance of each of the aiding methods against high accuracy DGNSS.