Ocean_SST_Usecase 2

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Use Case #2 - IDENTIFY data sources

Version: 1.0

Summary:

In this use case the user finds and selects data sets that meet a set of search criteria. The search criteria are specified by the user.

• Input: Parameters associated with the target data set.
• Output: List of data sets ==> This list is the input to Use Case #3, in which a match-up data set is built.

• Data sets must be discoverable with GCMD, ADL or ...

• Must know certain critical aspects (metadata) about target data set-- such as spatial extent, temporal extent, spatial resolution and temporal resolution,

Triggers:

Basic course of events:

1. Provide data set search parameters: - spatial range
   - temporal range
   - spatial resolution
   - temporal resolution
   - type (climatology or time series)
   - source (model, in situ, satellite)
   - Access mechanism
2. Issue request to search engine(s).
3. Manually filter response to arrive at the desired data set list
4. Output this list.

Alternative paths:

Postconditions:

Business rules:

Notes:

• Data sets may be remote
• Data sets may not be well described
• Data sets may be very large

Author and date - SST Use Case Development Group 25 July 2007.

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