PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-04:27:40
G01     82.9           32.9                4.1 +/-    0.67       6.8 +/-    0.67  0.040 / 0.070
G07     130.7          37.8                6.8 +/-    0.63      10.3 +/-    0.63  0.040 / 0.080
G11     60.5           35.9               -3.5 +/-    0.36      -5.5 +/-    0.36  0.040 / 0.060
G13     286.9          37.9                5.0 +/-    1.41       7.6 +/-    1.41  0.040 / 0.060
G15     312.0          11.6                2.3 +/-    1.57       6.3 +/-    1.57  0.090 / 0.290
G17     218.9          62.5                7.8 +/-    0.99       8.7 +/-    0.99  0.090 / 0.270
G18     54.7           20.3                2.5 +/-    1.26       5.4 +/-    1.26  0.080 / 0.090
G19     217.4          30.6                7.4 +/-    1.53      12.7 +/-    1.53  0.070 / 0.130
G28     356.1          61.5                4.9 +/-    0.97       5.5 +/-    0.97  0.030 / 0.030
G30     119.6          72.8                7.0 +/-    0.90       7.3 +/-    0.90  0.030 / 0.030