Opened 4 years ago

Closed 4 years ago

#1615 closed help (answered)

Extracting island data from a UM4.5 Ocean dump

Reported by: sjh395 Owned by: um_support
Component: UM Tools Keywords:
Cc: Platform:
UM Version: 4.5

Description

I need to extract the island data from the header of a UM4.5 Ocean Dump. Is there a utility or script to do this? Xancil will allow me only to add island data to an ocean dump whilst um2nc doesnt see the island data when converting an ocean dump to an NetCDF.
Kind regards
Steve

Change History (3)

comment:1 Changed 4 years ago by sjh395

I wonder if there is a document available that describes the internals of the dump file - Ideally I would like to write my own Fortran/c interface to the binary file to allow me to extract data or modify the header and fields within the dump. This would allow me to solve several other ideas/problems I have.
Steve

comment:2 Changed 4 years ago by jeff

Hi Steve

There is a document describing the 4.5 UM format here

http://cms.ncas.ac.uk/documents/vn4.5/pf003.pdf

It is document F3 from this web page

http://cms.ncas.ac.uk/wiki/Docs/MetOfficeDocs

The island data is in the EXTRA_CONSTANTS field and is described in chapter 6.

The uminfo utility will print out the values of the EXTRA_CONSTANTS field.

Jeff.

comment:3 Changed 4 years ago by grenville

  • Resolution set to answered
  • Status changed from new to closed
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