====== Requirements for Osisaf  before Release ======

**Meeting:** //for Osisaf:// Steinar Eastwood, Thomas Lavergne, //for Metamod://Egil Støren, Heiko Klein, Trond Michelsen, Geir Aalberg

**Date:** 2010-02-12

**Reporter:** Heiko Klein

===== Metadata =====

  * Egil took the metadata-extractor from the requirements for the dokipy.
  * Thomas testet successfully the Osisaf-files against dokipy.
  * Some additional global attributes are required:
    * platform_name (i.e. satellite, comma-separated list)
    * instrument_name (comma-separated list)
    * copyright_statement
    * area (comma-separated list, **Steinar** will provide a list of allowed names, those will be extended in the future.)
  * Metamod will test for the required attributes. Metamod does not run a full CF-compliance-check.

===== Dataset =====

  * Osisaf has dataset-codes like //osi-401// or //osi-409//. Those datasets include both northern (nh) and southern (sh) hemisphere files. Therefore, for Metamod these datasets need to be split into the searchable areas.
    * Datasets must be created by Osisaf in the Metamod Administration interface
      * **Egil** will help with the creation of the first datasets
    * The SMS-job putting data on Osisaf will need to trigger the metadata-extraction in osisaf by calling the following url (e.g with wget): <code>
 http://metamod.../...?dataset=...&dirkey=...&filename[]=...&filename[]=...
</code> On failure, the return-code is 500/Application Error.

===== Data =====

  * The current data-storage is ''/vol/osisaf''. This might be moved to ''/vol/osisaf/data''. **Steinar** will inform Egil/Heiko if/when this happens.
  * The storage directory for datasets is either ''archive'' or ''reprossessing''.
  * The data of the datasets might reside in sub-catalogs of the dataset-catalog, e.g. ''dataset/YYYYMM/fileYYYYMM.nc''. This is for easier browsing of the ftp-server. The files of the datasets are unique, independently of the sub-catalogs.
  * Metamod and Thredds are not! going to index/access the ''prod'' catalogue, since this is only a subset of the ''archive''.
  * Osisaf-Operators might delete files, and resend them at a later stage. Metamod can already handle that, with the exception that for the time in between, metamod might link to an non-existing file.

===== Thredds =====

  * a first functional Thredds/ncWMS configuration will be made by **Heiko**. Thomas/Steinar will then take over and eventually add further information.

===== WMS =====

  * as server, ncWMS/Thredds will be used.
  * all files have only 1 time
  * the first version of the client will be missing some functionality, which will be
added during Metamod2.5/CryoClim:
    * no border/map (institute will set up a map-server at a later stage)
    * limited printing-support
    * no selection of default legend/colors
    * no selection of default projection
  * some functionality is not supported in Thredds/ncWMS, and will be looked at within the MyOcean project:
    * no support for vectors
    * no support for 'flag_values'
  * Open questions:
    * Does ncWMS support only quadratic pictures?
    * Is it easy possible to add own projections to ncWMS?

===== Review =====

Steinar informed that the Osisaf reviewer will require a service description. Steinar will come back to this at its time, with some additional information.