Aurora Australis Voyage V3 2006/07 (SAZ-SENSE) Track and Underway Data

Brief description

This dataset contains the underway data collected during the Aurora Australis Voyage V3 2006/07 (SAZ-SENSE).

Voyage name : Sub-Antarctic Zone - Sensitivity to Environmental Change
Voyage leader: Vicki Lytle

Underway (meteorological) data are available online via the Australian Antarctic Division Data Centre web page (or via the Related URL section).

Calibrated data from this voyage are also available for download at the provided URL.

Taken from the provided "readme" as part of the download file:
The underway data files contain data logged by the Aurora Australis
data logging system, including met data, bathymetry, GPS, and sea surface
salinity and temp. The data have been quality controlled.
Underway data are the property of the Australian Antarctic Division (except
for underway salinity).

The files are:
sazsenseora.txt = column format ascii file
sazsenseora.mat = matlab format

Lineage

Progress Code: completed

Statement: The data have been acquired at 0.1 Hz. There will be the occasional invalid value such as temperatures being out of range.

This dataset has not been checked. Please verify the data before use.

See the Marine Science Support Data Quality and Programmer's Reports at the Related URL section.

Where data for a particular sensor do not exist for a particular time, the last known value is used unless the sensor has been disabled or has encountered an error. For example, some sensors only record data every minute, but the resolution for the underway dataset is 10 seconds, so the same value will be used 6 times a minute. No averages are taken for sensors that capture data at a rate other than every 10 seconds. Instead, each record will be a snapshot of each sensor at that time.

Regarding the calibrated and quality controlled data available for download:

* The data are 1 minute average values, except:
- latitude and longitude data are 1 minute instantaneous values

* underway sea surface salinity data are from a sensor in lab 1 on the ship (P.I. Bronte Tilbrook, CSIRO)

* underway sea surface salinity and temperature data have had a correction applied, derived from comparison to near surface CTD data

* for this cruise, there's no processed bathymetry data (all null values in the final data files)

* for this cruise, there's no ship speed data (only gps speed over ground)

* for the 1 minute averaged data supplied by Antarctic Division for wind speed and gps speed over ground: unknown if averages are scalar or vector

* all times are UTC

* The data have had some automatic quality controlled applied by the Antarctic Division processing software, however a small number of data spikes remain.