PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/26-12:42:50
G07     43.8           69.7                3.8 +/-    0.69       4.0 +/-    0.69  0.040 / 0.050
G08     52.2           40.9                3.0 +/-    0.58       4.3 +/-    0.58  0.040 / 0.040
G09     177.0          37.4                6.2 +/-    1.11       9.4 +/-    1.11  0.060 / 0.090
G11     120.5          33.7                5.7 +/-    0.66       9.2 +/-    0.66  0.060 / 0.080
G17     199.5          12.4                4.8 +/-    4.92      12.6 +/-    4.92  0.060 / 0.110
G18     106.0          15.2                5.4 +/-    1.30      13.4 +/-    1.30  0.060 / 0.090
G28     271.7          51.2                4.2 +/-    1.37       5.2 +/-    1.37  0.030 / 0.030
G30     328.5          57.3                2.5 +/-    1.02       2.9 +/-    1.02  0.030 / 0.040