PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-21:12:30
G02     200.4          22.7               19.9 +/-    2.45      41.0 +/-    2.45  0.090 / 0.110
G06     168.9          56.4               19.3 +/-    1.06      22.7 +/-    1.06  0.070 / 0.120
G13     226.2          12.0               18.9 +/-    2.68      50.5 +/-    2.68  0.040 / 0.100
G17     19.2           60.9               15.7 +/-    0.71      17.7 +/-    0.71  0.050 / 0.100
G19     322.9          70.5               15.9 +/-    0.75      16.8 +/-    0.75  0.070 / 0.160
G24     308.8          30.9               14.3 +/-    2.23      24.6 +/-    2.23  0.080 / 0.130
G28     90.0           38.6               16.7 +/-    0.37      24.8 +/-    0.37  0.080 / 0.300
G30     157.1          12.6               20.0 +/-    2.03      52.7 +/-    2.03  0.090 / 0.300