At the beginning of the first quarter of 1993 I completed the first 
draft of the paper on our astrometry results. From January 8 to 26 I was 
in Sydney (including one week of vacation) to attend the IAU conference 
on "Very High Angular Resolution Imaging". I presented two posters, one 
on our binary research (in collaboration with J.T. Armstrong), and the 
other on our astrometry results. After returning from Sydney I continued 
the astrometry work. I rewrote one of the data reduction programs due to 
its unsatisfactory performance. I also wrote a program to create 
artificial astrometry data in order to test the new program. It turned 
out that our data does not fully constrain the solution for baseline 
coordinates and star positions, but needs additional constraints. I 
completed a second draft of the astrometry paper based on these results. 
I spent most of March finishing the final data reduction of the binary 
Eta Andromedae, including Monte Carlo simulations using three different 
methods to derive parameter uncertainty estimates. I completed the first 
draft of the corresponding paper, including a discussion of the 
evolutionary state of the system.