PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/08-13:27:50
G01     113.4          21.6                9.3 +/-    0.60      19.6 +/-    0.60  0.030 / 0.030
G07     97.4           60.0                8.3 +/-    0.57       9.5 +/-    0.57  0.030 / 0.040
G08     42.7           24.4                6.5 +/-    0.85      12.9 +/-    0.85  0.090 / 0.140
G09     174.5          18.3                8.2 +/-    0.97      18.7 +/-    0.97  0.100 / 0.170
G11     95.7           40.0                9.0 +/-    1.15      13.0 +/-    1.15  0.030 / 0.030
G13     315.6          22.2                2.8 +/-    1.53       5.9 +/-    1.53  0.030 / 0.030
G17     202.6          33.2                8.0 +/-    1.01      13.1 +/-    1.01  0.060 / 0.090
G28     304.5          59.3                5.8 +/-    0.71       6.7 +/-    0.71  0.080 / 0.090
G30     353.5          71.7                6.0 +/-    1.36       6.3 +/-    1.36  0.060 / 0.240