Compare at Sea Position Using MINI-RANGER, LORAN C (INTERNAV) in the Context of Measuring Current Velocity with a Shipboard ADCP (Acoustic Doppler Current Profiler)
Abstract
The scope of this thesis is to evaluate the use of the MINI RANGER, LORAN (TD) and LORAN (DISPLAY) navigation systems in order to support the collection of current profiles by an Acoustic Doppler Current Profiler Recorder (ADCP). A theoretical error analysis of these systems is undertaken in order to establish the minimum error limits which might be expected when averaging current profiles over time frames of up to 30 minutes. Experimental data was collected with all of these systems in the Monterey Bay and was analysed. In addition GPS (Global Positioning System) data was also collected but time has prohibited its analysis and subsequent inclusion. The results show that because of ship fluctuations in course and speed there is no statistically significant difference between the navigation systems when we average the data over times of about 25-30 minutes. However, they also show that both the MINI RANGER and Bottom Tracking with the ADCP can produce reasonable results in as little as three minutes, although the ADCP results are clearly biased.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1989
- Accession Number
- ADA223672
Entities
People
- Ioannis S. Moschovos
Organizations
- Naval Postgraduate School