PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-22:57:40
G02     218.8          64.0               15.9 +/-    0.91      17.5 +/-    0.91  0.060 / 0.060
G06     50.9           70.9               14.6 +/-    0.45      15.4 +/-    0.45  0.070 / 0.070
G12     319.7          39.5               11.7 +/-    1.13      17.1 +/-    1.13  0.070 / 0.080
G17     58.2           33.1               12.3 +/-    1.73      20.2 +/-    1.73  0.140 / 0.120
G19     41.5           48.3               13.2 +/-    1.04      17.0 +/-    1.04  0.040 / 0.030
G24     260.9          40.8               15.5 +/-    4.01      22.3 +/-    4.01  0.040 / 0.030
G28     124.8          11.1               16.8 +/-    2.05      45.7 +/-    2.05  0.320 / 0.400