Issue I494 [enhancement,constants] Update constants to CODATA2010. In SIMION 6.0/7.0/8.0, the constants are essentially CODATA1986 values (see http://en.wikipedia.org/wiki/CODATA ). Dahl2000 notes "The physical constants used in version 6.0 and 7.0 are from the 74th edition of the CRC Handbook of Chemistry and Physics  Values of these physical constants (e.g. c, electron mass, and elementary charge) are defined to 8 or 9 significant place accuracy". The 74th edition (1993-1994) uses CODATA1986, which were the latest CODATA values at that time. SIMION 8.0 also uses these constants. In SIMION 8.1.0, constants are now CODATA2010. Resolved in 8.1.0-TEST3.