PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-09:27:50
G01     124.4          13.8                5.0 +/-    1.52      12.8 +/-    1.52  0.030 / 0.030
G07     64.8           68.5                5.6 +/-    0.61       6.0 +/-    0.61  0.020 / 0.030
G08     47.3           35.1                4.0 +/-    0.94       6.3 +/-    0.94  0.190 / 0.210
G09     174.4          28.2                5.6 +/-    1.53      10.2 +/-    1.53  0.140 / 0.210
G11     113.0          37.3                7.1 +/-    0.99      10.9 +/-    0.99  0.040 / 0.030
G13     320.0          14.7                3.0 +/-    1.38       7.6 +/-    1.38  0.040 / 0.030
G17     199.8          19.6                3.3 +/-    1.92       7.4 +/-    1.92  0.060 / 0.070
G18     99.2           18.2                4.9 +/-    2.30      11.3 +/-    2.30  0.080 / 0.090
G28     280.5          54.0                3.6 +/-    2.67       4.3 +/-    2.67  0.130 / 0.200
G30     334.7          62.2                3.9 +/-    0.70       4.3 +/-    0.70  0.100 / 0.220