Ocean Bottom (OB) Instrument Surveying

This is a package that provides functionality for using acoustic ranging and NMEA GNSS feeds to survey in the locations of ocean bottom instruments.

The latest official version is available on GitHub: NevPalmer/ob_inst_survey.

NFSI staff have made various modifications to this package which have not yet been incorporated in the official release. Our version can be found here: nfsi-canada/ob_inst_survey

Dependencies

• Python 3.9+
• matplotlib
• numpy
• scipy
• pandas
• cartopy
• pyproj

Default Outlier Rejection Criteria

• Range less than 50m
• Range less than a priori water depth
• Range greater than 1.6x a priori water depth (offset angle >51°)
• Residual greater than 3x standard error at any iteration of trilateration calculation