Monthly report for July 1998 by Christian A. Hummel:

CAH enlarged and updated significantly the manual on the NPOI data reduction
software OYSTER. (Significant, because that is what is a feature of a data
reduction package for everybody using the NPOI.)

CAH wrote a paper for the proceedings of the IAU colloquium 170 in Victoria, 
"PRECISE STELLAR RADIAL VELOCITIES", on "Imaging and modeling of double stars 
with the Navy Prototype Optical Interferometer: a continuation of the Mark III 
double star program". (Significant, because we have educated the spectroscopists
on what can be done with an interferometer like NPOI.)

CAH received word from AJ that the paper on "NPOI observations of double stars
Mizar A and Matar" has been accepted with minor modifications. CAH prepared
a revised version and submitted the paper to AJ. (This is the 4th NPOI
publication in a refereed journal.)

CAH reduced all Delta Cephei NPOI observations for an independent check on
the Flagstaff reduction of the diameter changes. The agreement is good, but 
not perfect. (The significance of the diameter variations is marginal, therfore
difficult to establish.)