Description of muons Data Tables The Tables present the hourly values of cosmic ray changes obtained during the continuous registration by the muon telescopes in Yakutsk for the January 1971 to December 2003 period. Each Table contains the hourly values of cosmic ray intensities. The primary data corrections for barometric effects have been made. The barometric coefficient is equal to 0.13%/mbar for 0 m w.e. The barometric coefficient is equal to 0.10%/mbar for 7 m w.e. All data are referred to the pressure of 1003 mbar. The Tables are presented in universal time (UT) 1h=(0-1)h UT. FORMAT FORTRAN description 1 A3 A00 - level 0 m w.e., A07 - level 7 m w.e. 2 I3 Year 71, 72, 73,...., 03 2 I3 Month 1-12 3 I3 Day 1-31 4 I3 Hour 1-24 5 I4 scaling factor for vertical 6 I5 cosmic ray intensity data registreted by muon telescope from vertical direction 7 I4 scaling factor for a direction 30 degrees from north (N30) 8 I5 cosmic ray intensity data registreted by muon telescope from N30 direction 9 I4 scaling factor for a direction 30 degrees from south (S30) 10 I5 cosmic ray intensity data registreted by muon telescope from S30 direction NOTE: value '9999' means no data.