Acoustic Doppler Current Profiler (ADCP) calibrations for the USCGC Healy
by Andreas Muenchow, University of Delaware, Oct.-18, 2004
Summary:
| Cruise | Angle | Scaling | #-data | Date | Comment |
| HLY04-04: | 0.497 | 1.021963 | | Sept.-12-2004 | New AshTech adjusted by 0.7 degrees |
| HLY04-03: | 1.115 | 1.012668 | | Sept.-12-2004 | New acoustic window installed in dry-dock
|
| HLY03-03: | 0.006 | 1.020850 | | Sept.-12-2004 |
| HLY03-01: | 0.016 | 1.021158 | 1168 | Oct.-18-2004 |
| HLY02-03: | -0.011 | 1.011563 | 759 | Oct.-18-2004 |
Processing Details
- speed of sound corrections using temperature from ADCP sensor
- fixed misalignment of 44.1 degrees applied prior to processing
- 10-minute data windows within which data are sorted;
- the variable with the largest variance is used to
create an index table (subroutine "indexx" of Press et al, 1996; p.330)
which is used to prune data prior to averaging;
- and largest and smallest 10%
of the data are discarded as outliers most likely reside there;
Results:
