WII6 is the sixth generation of the Waves In Ice buoy, the instrument behind more than a decade of sea-ice wave science. A new 32-bit board, satellite messages with roughly 300 times the capacity of SBD, the wave maths running on the buoy itself, and a WiFi dashboard for the bench and the deck.
Wave results from 326 bytes. Choose the capture length, sampling rate and reporting interval, and which captures send a power spectrum, a 2 Hz record or the full-rate data. The full record stays on the card.
The buoy
STM32 on Zephyr, Iridium Certus, a hull built for ice, and the option of a Sparton motion sensor proven on multiple WII5 deployments.
Interfaces
A dashboard over WiFi on the bench and the deck, console access to every subsystem, and a cloud site for deployments, buoys and downloads.
The maths
Significant wave height, peak period, the spectrum and the directional spectrum, from a library that runs on the buoy’s processor and is tested against reference data whenever the maths changes.
Your data
Every record, every message and every run in one write-once store you can copy with rsync. Formats named and versioned so a 2016 message still decodes.
Heritage
From the 2012 NIWA array and the 2014 Nature paper to the KOPRI fleet of 2024. The deployments, the public datasets and the open source live on the WII5 site.
Talk to us
Planning a deployment, or want a buoy on your bench? WII6 is being tested on development boards. Tell us the season and the site.
More than a decade in the ice: the deployments