Parameters of the midlatitude positive bays (MPB)
 Calculated at Space Research and Technology Institute, Sofia, Bulgaria
 
 Station: PAG
 Date of observation: 20.09.2009
 
 beginning time = 1271 min.(UT), 21:11 UT
 Xbegin =         -9.160 nT
 time of max =    1291 min.(UT), 21:31 UT
 Xmax =            8.586 nT
 Y at Xmax =      -1.626 nT
 endtime =        1318 min.(UT), 21:58 UT
 Xend =           -4.474 nT
 amplitude =      17.746 nT
 base duration time = 47 min.
 2sigma =          3.181 nT
 duration at 2sigma = 22 min.
 flagbegin = 0
 flagend =   0
 flagxcheck = 0