The National Research Institute of Fisheries Engineering (NRIFE) of the Japan Fisheries Research
and Education Agency (FRA) will this spring deploy an ASL Environmental Sciences solar-powered datalogger with a cellular modem.

The deployment of this system follows FRA’s use of the ASL multifrequency acoustic zooplankton fish profiler (AZFP) in Yamada Bay, 450 km north of Tokyo, since 2013. The data they collect are being used to understand seasonal variations of zooplankton in the water column.

To help the scheduling of the release of hatchery reared juvenile salmon and increase their survival in the sea, FRA scientists purchased equipment upgrades in 2016 which included a solar-powered datalogger with a cellular modem for the AZFP and a conductivity temperature (CT) sensor.

The datalogger acquires raw data from the AZFP and then averages the data into 1-m bins over a ping interval of 30
pings. These data are then retrieved on demand via a cellular modem and downloaded to the NRIFE
offices.

The raft-mounted datalogger system includes a solar panel, a charge controller, rechargeable batteries, a
datalogger with AZFP data software, serial connections to the CT sensor and AZFP and a cellular modem.

Source: ASL Environmental Sciences Inc.