PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-04:42:50
G01     117.7          18.9                7.8 +/-    1.40      17.6 +/-    1.40  0.040 / 0.050
G07     85.0           65.2                5.0 +/-    0.67       5.5 +/-    0.67  0.040 / 0.040
G08     44.4           29.9                4.6 +/-    1.40       8.0 +/-    1.40  0.080 / 0.130
G09     177.1          24.9                6.7 +/-    0.66      13.1 +/-    0.66  0.060 / 0.140
G11     105.4          39.9                8.1 +/-    0.63      11.9 +/-    0.63  0.080 / 0.120
G13     317.6          19.4                2.2 +/-    1.57       5.0 +/-    1.57  0.060 / 0.180
G17     201.9          27.1                5.6 +/-    1.32      10.4 +/-    1.32  0.140 / 0.120
G28     296.9          58.3                3.7 +/-    0.77       4.3 +/-    0.77  0.140 / 0.120
G30     353.7          70.7                4.4 +/-    0.61       4.6 +/-    0.61  0.020 / 0.030