PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-18:27:50
G01     110.0          24.0               14.7 +/-    1.88      29.3 +/-    1.88  0.150 / 0.140
G07     101.6          60.9               14.8 +/-    0.66      16.7 +/-    0.66  0.100 / 0.080
G08     42.7           25.1               12.4 +/-    2.11      24.3 +/-    2.11  0.020 / 0.030
G09     175.5          16.4               14.0 +/-    2.95      33.7 +/-    2.95  0.020 / 0.030
G11     94.4           42.8               14.6 +/-    0.70      20.3 +/-    0.70  0.040 / 0.040
G13     311.9          26.6               13.7 +/-    1.62      25.8 +/-    1.62  0.040 / 0.040
G17     205.6          31.8               15.0 +/-    1.31      25.3 +/-    1.31  0.100 / 0.150
G18     84.0           23.9               12.0 +/-    1.37      24.1 +/-    1.37  0.080 / 0.160
G28     312.5          60.5               13.7 +/-    0.96      15.5 +/-    0.96  0.040 / 0.060
G30     15.7           76.7               15.0 +/-    0.99      15.4 +/-    0.99  0.050 / 0.050