Just declassified and released after 8 years from FOIA request:
   NSA TEMPEST 01-02 NONSTOP Evaluation Standard (Oct 2002):
   [1]http://cryptome.org/2014/05/nsa-tempest-01-02-oct-02.pdf (3.2MB)
   Compare NONSTOP Techniques from 1975:
   [2]http://cryptome.org/nacsem-5112.htm
   Both heavily redacted but comparison may fill in missing.
   The TEMPEST researchers at Cambridge may have full documents.
   What say?
   Our compilation: [3]http://cryptome.org/nsa-tempest.htm

References

   1. http://cryptome.org/2014/05/nsa-tempest-01-02-oct-02.pdf
   2. http://cryptome.org/nacsem-5112.htm
   3. http://cryptome.org/nsa-tempest.htm