meter = # of timesteps 
    <LI>
    2nd parameter = file name 
</UL>
<PRE>
dump all atom velocities to a file every this many timesteps
when rRESPA is enabled, this is steps of outermost loop (longest timesteps)
velocities are also dumped at the start and end of every run
any previous file is closed
new filename can exist, will be overwritten
value of 0 means never dump

Default = 0
</PRE>
<HR>
<H3>
<A NAME="_cch3_951437269">extra memory</A></H3>
<UL>
    <LI>
    1st parameter = extra_own = padding factor