This record describes scientific split-beam echosounder data collected on the RV Investigator voyage IN2019_V06, titled 'Tropical observations of atmospheric convection, biogenic emissions, ocean mixing, and processes generating intra-seasonal SST variability' which departed Darwin on the 19th of October 2019 and returned to Darwin on the 17th of December 2019 ,consisting of two legs.
Leg 1 - Darwin, 20:00, 19 October 2019 to Darwin, 19:00, 10 November 2019
Leg 2 - Darwin, 20:00, 11 November 2019 to Darwin, 08:00, 17 December 2019
The Simrad EK60 split beam echosounders 18, 38, 70 120, 200 and 333 kHz were used to acquire acoustic backscatter data, around the Northwest Shelf station (121.5 E, 14 S) for Leg 1 only.
The port drop keel position was set to 4 m and the starboard drop keel set to flush with hull for the duration of the voyage. The EK60 was switched off on Leg 1 (00:45 23-Oct-2019) at the request of the Chief Scientist to reduce interference on the ADCP data. This remained off for the duration of Leg 2.
Data are stored in .raw, .bot and *.idx format at CSIRO. There are 174 files totalling 8.39 GB of raw data in this dataset (note that raw_ek60 data was only collected on Leg 1)
No Post-Processing has been conducted on this data.
Additional information regarding this dataset is contained in the GSM data acquisition and processing report. Additional data products may be available on request.
