PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-01:43:10
G01     57.5           29.5                5.8 +/-    1.66      10.2 +/-    1.66  0.050 / 0.050
G06     180.8          16.0                8.4 +/-    2.68      20.5 +/-    2.68  0.040 / 0.050
G07     143.5          20.1                7.1 +/-    2.09      15.5 +/-    2.09  0.090 / 0.070
G11     48.4           24.1                3.7 +/-    1.16       7.4 +/-    1.16  0.060 / 0.100
G13     260.3          34.1                8.4 +/-    1.17      13.6 +/-    1.17  0.110 / 0.150
G15     290.6          16.8                7.3 +/-    1.60      17.5 +/-    1.60  0.110 / 0.230
G17     265.5          76.2                7.4 +/-    0.67       7.6 +/-    0.67  0.030 / 0.020
G19     235.9          53.4                7.5 +/-    1.82       9.1 +/-    1.82  0.030 / 0.030
G28     41.0           55.5                4.0 +/-    1.81       4.8 +/-    1.81  0.070 / 0.110
G30     144.5          45.5                8.2 +/-    0.97      11.0 +/-    0.97  0.080 / 0.120