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               20.2 +/-    2.51      41.7 +/-    2.51  0.140 / 0.240
G06     168.9          56.4               18.3 +/-    0.68      21.5 +/-    0.68  0.160 / 0.240
G13     226.2          12.0               19.4 +/-    1.82      51.8 +/-    1.82  0.060 / 0.090
G17     19.2           60.9               15.9 +/-    0.55      17.9 +/-    0.55  0.050 / 0.080
G19     322.9          70.5               15.8 +/-    0.55      16.7 +/-    0.55  0.030 / 0.050
G24     308.8          30.9               15.1 +/-    1.92      25.9 +/-    1.92  0.030 / 0.040
G28     90.0           38.6               16.3 +/-    1.08      24.3 +/-    1.08  0.350 / 0.240
G30     157.1          12.6               20.6 +/-    3.00      54.3 +/-    3.00  0.390 / 0.300