| Summary: | Progress Code: completed Statement: During the first two trips of blue whale voyage 2, 13 - 30 March (a trip is defined by the process of leaving and returning to port), the logging laptop was 2 mins and 15 seconds ahead of the GPS time. Therefore, the date/time stamp from the first two trips has been corrected for this slight discrepancy. All date/time values are in UTC. Also, during the second trip, the serial port between the GPS and the logging laptop was disrupted. Therefore, about 4 hours of GPS data was not recorded. To fill this in, we took four hours of another GPS series, recorded on a Blue Planet Marine GPS unit. Whether a given GPS point came from the AAD or BPM GPS units is noted in the 'data.source' column. There are two GPS data indices in the 'gps_meld_data_exp.csv' file. The first, in the column 'Index' represents the numbering of the original GPS data streams so that one can refer back to the original GPS data if required. The other is 'Index.new', which represents a new index based on the amalgamated GPS data. It should also be noted that effort and sighting data have been corrected for this Index.new column as well. The Blue Planet Marine GPS data has also been included in this file ('EV_GPS_logs_7Jan - 30March.xlsx'). However, please note that for 13-19 March, GPS data was exported for the time-zone that runs along the west coast of the US. Therefore, if you wish to use the BPM GPS data, these date/time data for these days needs to be _brought_forward_7 hours_ to bring it into line with UTC. GPS data after 19 March have all been exported at UTC. The remaining GPS data, that from the first blue whale voyage, namely 7-25 January, have **NOT** been checked, but there is every reason to believe that these, too, were exported at the timezone that runs along the west coast of the US. Purpose To begin the process of testing acoustic tracking to locate blue whales, two separate surveys were conducted off the southern coast of Australia. In particular, the surveys targeted an area called the ...
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