Monthly report for March 2002 by Christian A. Hummel: Hummel reduced more than 8 nights of astrometric data. Various bugs in the processing software related to pecularities in the new raw data were fixed, and a new plot variable, the total NAT counts, was integrated into the interactive analysis software OYSTER. A preliminary dispersion correction, part of the standard astrometry reduction was attempted on the data of March 21. Follow-up raw data analysis was performed to investigate the unexpected noisy nature of the solutions. NPOI internal web pages summarizing the status of the astrometry reductions were updated.