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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

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Sensor URN

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base directory

/exdata/

The base-directory is given by the sensor urn. Expedition data is located under /base-directory/exdata/   The first level below /exdata/ describes the expedition and if applicable the science activity and device operation. 

Following schema shall be used for naming this subdirectory:  ( expedition _ scienceactivity - deviceoperation  e.g. PS85_444-2  for expedition PS85  science activity 444 and device operation 2).  This shall not be splitted into two directories!

examples: vessel/polarstern/hydrosweep_ds3/exdata/PS122_1/,  towed_systems/ofos_1/digital_camera/exdata/PS121_49-1/       TODO: _ is ambiguous  expedition_leg vs expedition_scienceactivity. _ shall therefore not be used in the expedition name.  "." has to be used for splitting expeditions into several legs.

Examples for expeditions: PS120, PS122_1.1 (Expedition PS122 leg 1), MSM09_3, HE_400,