PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-19:43:10
G01     123.7          14.5               18.4 +/-    1.77      46.3 +/-    1.77  0.230 / 0.370
G07     64.4           69.0               12.9 +/-    0.49      13.8 +/-    0.49  0.200 / 0.410
G08     49.4           39.7               11.7 +/-    0.66      17.1 +/-    0.66  0.110 / 0.420
G09     178.2          32.2               17.5 +/-    1.15      29.3 +/-    1.15  0.180 / 0.500
G11     115.6          37.3               16.6 +/-    1.14      25.2 +/-    1.14  0.070 / 0.100
G13     320.0          14.8                9.8 +/-    2.54      24.6 +/-    2.54  0.070 / 0.110
G17     202.1          14.9               19.6 +/-    0.84      48.9 +/-    0.84  0.050 / 0.060
G18     100.3          18.6               15.6 +/-    1.34      35.5 +/-    1.34  0.050 / 0.070
G28     283.9          55.3               15.1 +/-    0.59      17.9 +/-    0.59  0.040 / 0.080
G30     341.7          65.5               12.2 +/-    0.35      13.3 +/-    0.35  0.030 / 0.040