  PLANET (the Probing Lensing Anomalies NETwork) is a worldwide collaboration
of astronomers whose primary goal is to monitor microlensing events densely and
precisely in order to detect and study anomalies that contain information about
Galactic lenses and sources that would otherwise be unobtainable. The results
of PLANET's highly successful first year of operation are presented here.
Details of the observational setup, observing procedures, and data reduction
procedures used to track the progress in real time at the three participating
observing sites in 1995 are discussed. The ability to follow several events
simultaneously with a median sampling interval of 1.6 hours and a photometric
precision of better than 0.10 mag even at I=19 has been clearly demonstrated.
During PLANET's 1995 pilot campaign, 10 microlensing events were monitored; the
binary nature of one of these, MACHO 95-BLG-12 was recognized by PLANET on the
mountain. Another event, OGLE 95-BLG-04, displayed chromaticity that may betray
the presence of blending with unresolved stars projected onto the same
resolution element. Although lasting only about a month, the campaign may allow
constraints to be placed on the number of planets with mass ratios to the
parent star of 0.01 or greater.
