PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-05:57:30
G02     1.0            75.8                1.5 +/-    0.53       1.5 +/-    0.53  0.040 / 0.060
G05     162.0          36.8                5.1 +/-    0.51       7.8 +/-    0.51  0.030 / 0.050
G06     41.7           40.1                0.7 +/-    1.00       1.0 +/-    1.00  0.040 / 0.080
G12     307.8          72.0                1.9 +/-    1.07       2.0 +/-    1.07  0.040 / 0.070
G17     87.7           11.3                3.3 +/-    2.53       8.9 +/-    2.53  0.030 / 0.030
G19     77.7           25.6                3.2 +/-    0.63       6.2 +/-    0.63  0.020 / 0.030
G24     227.2          21.2                5.6 +/-    1.42      12.1 +/-    1.42  0.090 / 0.120
G25     317.0          30.4                2.6 +/-    1.79       4.5 +/-    1.79  0.090 / 0.130
G29     288.6          11.2                0.3 +/-   14.74       0.8 +/-   14.74  0.070 / 0.120