Entries by Evan Cervelli

Plain English Oceanography: Insight into the Surface Layer of the Ocean During a Storm

Evolution of Oceanic Near-Surface Stratification in Response to an Autumn Storm Natasha S. Lucas, Alan L. M. Grant, Tom P. Rippeth, Jeff A. Polton, Matthew R. Palmer, Liam Brannigan, Stephen E. Belcher Journal of Physical Oceanography, November 2019, American Meteorological Society DOI: 10.1175/jpo-d-19-0007.1 What is it about? Why are we interested in the surface of […]

Setup.cfg: Managing Instrument Configuration Files

The instrument configuration file (setup.cfg) is a critical part of your Rockland instrumentation.  Proper management of the configuration file will ensure successful data acquisition. Here are a few tips and tricks for managing configuration files to make your life easier and help ensure successful data collection.   Anatomy of a configuration file: The first section […]

How to Zero the Pressure Sensor

Many oceanographic instruments including those designed by Rockland Scientific, contain pressure sensors. Within Rockland instruments, changes in pressure are sensed as changes in voltage which is converted to units of decibsr (dBar) in post processing. The dBar unit is extremely convenient because it is nearly synonymous with water depth in meters (m). At sea level, […]

Corrosion Prevention: Anodes, Nail-polish, and Continuity Checks

Corrosion prevention is an easy to overlook, yet critical practice for operating in the corrosive environment of the ocean. Your Rockland Scientific MicroStructure instrument is equipped with one or more sacrificial anodes to prevent corrosion of your instrument. The anodes are electrically connected to the entire instrument providing protection to the instrument when submerged in […]

Troubleshooting Realtime Instruments

The Rockland suite of instrumentation includes many realtime instruments including the VMP-2000, VMP-500-RT and the VMP-250-RT. Realtime instruments use an electro-mechanical cable to send data back to the ship in real time. Cables can reach lengths up to 2500m and sending data this distance is no easy task. The strength of the received signal on […]

CRECHE Seminar: An EM flow sensor for measuring the axial speed of gliders

Many thanks to the Centre for Research on Environmental, Coastal and Hydrological Engineering (CRECHE) for hosting Dr. Fabian Wolk, the President and co-founder of Rockland Scientific Inc. (Victoria, BC, Canada), a leading developer of scientific instrumentation for ocean microstructure and turbulence measurements. Fabian presented a seminar regarding instrumentation used on robotic autonomous underwater gliders that can […]