  Project GRAND has the capability of measuring the angle and identity of
single tracks of secondary muons at ground level. The array is comprised of 64
stations each containing eight proportional wire planes with a 50 mm steel
absorber plate placed above the bottom two planes in each station. The added
steel absorber plate allows muon tracks to be separated from the less massive
electrons. Over 100 billion identified muon angles have been measured. With the
high statistics available, it is possible to obtain muon angular asymmetries
with low systematics by subtracting west from east (and separately, south from
north) angles; the subtraction eliminates most of the systematic errors while
still retaining adequately small statistical errors on the differences. A
preliminary analysis is performed as a function of solar time to obtain the
effects on the muon rate due to effects of the sun.
