PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-12:58:10
G01     128.0          10.9                1.0 +/-   27.96       2.8 +/-   27.96  0.030 / 0.030
G07     49.0           69.7                8.3 +/-    0.55       8.8 +/-    0.55  0.030 / 0.020
G08     50.9           39.8                7.5 +/-    1.25      11.0 +/-    1.25  0.030 / 0.030
G09     176.9          35.7                8.4 +/-    0.69      13.1 +/-    0.69  0.030 / 0.030
G11     118.8          34.7                9.4 +/-    1.13      14.9 +/-    1.13  0.300 / 0.430
G13     321.4          10.8               -5.4 +/-   13.38     -14.9 +/-   13.38  0.330 / 0.280
G17     199.7          13.9                4.0 +/-    3.38      10.1 +/-    3.38  0.220 / 0.330
G18     104.5          16.0                7.9 +/-    2.26      19.1 +/-    2.26  0.130 / 0.230
G28     274.2          52.2                7.2 +/-    2.57       8.9 +/-    2.57  0.110 / 0.230
G30     330.3          58.7                6.9 +/-    0.91       7.9 +/-    0.91  0.070 / 0.080