  Project GRAND is an array of proportional wire chambers composed of 64
stations with each station containing eight proportional wire planes and a 50
mm steel plate. The proportional wire planes together with the steel absorber
allow a measurement of the angle and identity of single muon tracks. Of the two
data-taking triggers, one is for single tracks. Since the rate of single muon
tracks at sea level above the muon energy threshold of the experiment (0.1 GeV)
is substantial, good statistics are available by accumulating several years of
data. A map in sidereal right ascension and declination is obtained as well as
one in a sun-centered coordinate system in order to study the sidereal and
solar effects separately.
