Performance of a Low-Power One-Way Travel-Time Inverted Ultra-Short Baseline Navigation System

Details

• Journal Title:
  OCEANS 2021: San Diego – Porto
• Personal Author:
  Jakuba, Michael V. ; Partan, James W. ; Webster, Sarah E. ; Giaya, Dennis ; Ramirez, Christina
• NOAA Program & Office:
  OAR (Oceanic and Atmospheric Research)
• Description:
  We report the performance of a low-power one-way travel-time inverted ultra-short baseline (OWTTIUSBL) system designed specifically for use on long endurance autonomous underwater vehicles (AUVs), as deployed during trials in late 2020. The system consists of a WHOI Micromodem-2 as the acoustic processing core coupled with a MEMS attitude and heading reference system (AHRS) and bespoke four-channel array. At low tilts our system provides standalone position fixes to better than ±5° azimuth at slant ranges in excess of 1500 m. The system consumes 1.1 W when active and is capable of entering a low-power 10 mW sleep mode sufficient to maintain its time base. These specifications are based on data collected with the device lowered from a vessel and excited by a mobile source on the vessel’s small boat. We further present preliminary results from the device as installed on a Seaglider that show the potential for improved low-power navigation insensitive to temporal or depth-dependent variations in current profile.
• Source:
  OCEANS 2021: San Diego – Porto (2021)
• DOI:
  https://doi.org/10.23919/OCEANS44145.2021.9705795
• Format:
  PDF
• Publisher:
  IEEE
• Document Type:
  Journal Article
• Funding:
  Grant no. NA18OAR0110356
• Rights Information:
  Accepted Manuscript
• Compliance:
  Submitted
• Main Document Checksum:
  urn:sha-512:dd7190a3d07224b01dbe7c7d5603dffa877199ac4beaaf108385d016ccc9654b527aad48914b422e7a8dabb24bdc8949ba46e6bccbd7af6201bcce1cf0a921d3
• Download URL:
  https://repository.library.noaa.gov/view/noaa/66903/noaa_66903_DS1.pdf
• File Type:
  [PDF - 6.62 MB ]