[SAC-HELP] how to rotate R T comp into N E ?

[weitao wang]

Hi,All
       I have a question while rotating horizontal component with sac. We
can use "rotate to GCP" to rotate N E into  R T comp,but how to rotate back
into N E components? Is there an easy way to do this?
      thanks for your help.
      Best wishes

weitao
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.iris.washington.edu/pipermail/sac-help/attachments/20090629/cb9e4f49/attachment.html>