PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-22:13:10
G07     330.8          57.1                9.7 +/-    0.72      11.3 +/-    0.72  0.030 / 0.060
G08     104.8          52.0               12.8 +/-    0.55      15.8 +/-    0.55  0.040 / 0.050
G09     197.4          75.6               11.7 +/-    1.11      12.1 +/-    1.11  0.060 / 0.170
G11     148.8          11.5               13.3 +/-    5.46      35.9 +/-    5.46  0.070 / 0.190
G23     154.6          41.4               12.9 +/-    0.99      18.3 +/-    0.99  0.060 / 0.090
G27     55.5           31.6                9.9 +/-    0.69      16.8 +/-    0.69  0.070 / 0.060
G28     236.7          29.3               13.6 +/-    1.93      24.2 +/-    1.93  0.050 / 0.100
G30     303.6          37.9               10.6 +/-    0.88      15.9 +/-    0.88  0.040 / 0.060