PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-00:13:10
G02     14.1           69.3                7.4 +/-    0.46       7.8 +/-    0.46  0.130 / 0.290
G05     156.6          46.0               11.7 +/-    0.52      15.5 +/-    0.52  0.240 / 0.310
G06     45.7           29.2                5.6 +/-    0.77      10.0 +/-    0.77  0.040 / 0.030
G12     264.6          80.0                8.0 +/-    0.71       8.1 +/-    0.71  0.030 / 0.030
G19     84.8           21.7                8.6 +/-    0.76      18.1 +/-    0.76  0.030 / 0.060
G24     219.7          14.6               15.0 +/-    4.36      37.7 +/-    4.36  0.040 / 0.070
G25     313.8          38.8                9.4 +/-    2.15      14.0 +/-    2.15  0.050 / 0.090
G29     294.4          15.1                9.1 +/-    1.92      22.5 +/-    1.92  0.050 / 0.080