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- letter to Muehlberger:
   .  summary of these targets
   .  beginnings of glossary
   .  updating sun angle, orbit groundtrack info

-  STS-2 CAP: when is new issue coming out (based on ~ 9/80 launch)

-  re-trace orbits during which 
   1) ground is in daylight
   2) crew is awake

 -  calculate sun angle + location for targets of interest in each orbit of interest

- fold in window fields of view [what windows will be useful when ... ]