Introduction

O2A data is archived. The data structure for archiving is described here. The SENSOR's parameter codes (URNs, Uniform Resource Names), e.g. vessel:polarstern:hydrosweep_ds3 describes the base storage directory for this specific device. This base directory is defined by the metadata description in sensor.awi.de.   Examples for base directory:   vessel:polarstern:hydrosweep_ds3 , towed_systems:loki_10001_02

Subdevices of a base device are described in the sensor urn by adding the sub devices Short Name to the base device URN. E.g. towed_systems:loki_10001_02:microflu-chl_1228. Base device and subdevices are named items for simplicity reasons. Any nesting of items is possible. There is no restriction for nesting.

Examples for different level of nesting in Sensor URNs:

(type:item:item:item)  vessel:polarstern:tsk1:sbe38

(type:item:item) towed_systems:loki_10001_02:microflu-chl_1228  vessel:polarstern:hydrosweep_ds3

(type:item) towed_systems:loki_10001_02

Sensor URNs describe the data storage location in our archive. E.g. temperature data from the sbe38 sensor, from termosalinograph keel 1 tsk1, on vessel polarstern, are stored unter the root directory  /vessel/polarstern/tsk1/sbe38/.   Picture data from loki_10001_02 are archived under /towed_systems/loki_10001_02/. This is the base-directory.

Datastructure below by Sensor URN given base directory

The base-directory is given by the sensor urn. Expedition data is located under /base-directory/exdata/   The first level describes the expedition. 

vessel/polarstern/hydrosweep_ds3/exdata/PS122_1/

Examples for expeditions: PS120, PS122_1, MSM09_3, HE_400,