Monthly report for June 2001 by Christian A. Hummel:

Hummel refereed a paper for ApJ.

Hummel implemented code both in CONSTRICTOR and OYSTER to
handle raw data for scans of any length. He used this code
to compute an hour long dispersion correction and showed
the possible existence of water vapor fluctuations in the
night of 2000-07-11. Hummel also computed power spectra for 
the true atmospheric fringe motion.

Hummel computed new orbits for 6 Lac and FK5 647 based on NPOI
and Mark III data. He sent the 6 Lac results and a new image
of HD 107700 to his collaborator in Geneva for further observations
with the Elodie spectrometer. 

Hummel scheduled and reduced 20+ nights of NPOI observations, 5+ of
them astrometric.