PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-03:57:40
G01     112.5          22.2               10.1 +/-    1.25      21.2 +/-    1.25  0.030 / 0.050
G07     99.3           60.2                6.2 +/-    0.71       7.1 +/-    0.71  0.030 / 0.030
G08     42.2           22.7                3.0 +/-    1.11       6.3 +/-    1.11  0.090 / 0.200
G09     174.4          17.1                7.0 +/-    0.96      16.7 +/-    0.96  0.120 / 0.230
G11     94.4           42.1                6.8 +/-    0.42       9.6 +/-    0.42  0.070 / 0.190
G13     313.4          25.3                5.2 +/-    1.70      10.0 +/-    1.70  0.070 / 0.190
G17     202.5          34.6               10.7 +/-    1.16      17.0 +/-    1.16  0.090 / 0.210
G18     83.0           22.5                2.2 +/-   10.14       4.6 +/-   10.14  0.100 / 0.230
G28     302.7          58.7                6.1 +/-    0.59       7.0 +/-    0.59  0.030 / 0.030
G30     357.8          73.7                5.6 +/-    0.65       5.8 +/-    0.65  0.030 / 0.030