Writes an updated header to an existing binary SAC-file.
Parameters: | f filename (SAC binary). |
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>>> from obspy.sac import SacIO
>>> tr = SacIO('test.sac')
>>> tr.WriteSacBinary('test2.sac')
>>> u = SacIO('test2.sac')
>>> u.SetHvalue('kevnm','hullahulla')
>>> u.WriteSacHeader('test2.sac')
>>> u.GetHvalueFromFile('test2.sac',"kevnm")
'hullahulla '