[fitsbits] 64-bit integers

[Greg Hennessy]

In article <15261.21485.339424.184013 at hoku.cfht.hawaii.edu>,
Thierry Forveille  <forveill at cfht.hawaii.edu> wrote:
> Could you come up with a few practical examples that actually demand the
> dynamics of 64-bit integers? 

The FAME astrometric mission will have a 10Mhz clock operating for 5
years. That will be about 2^54 clock ticks, which can't be stored
in a double precision without loss of precision.