PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-10:42:40
G01     81.7           33.1                4.4 +/-    0.88       7.2 +/-    0.88  0.060 / 0.060
G07     131.5          38.5                7.2 +/-    0.51      10.7 +/-    0.51  0.060 / 0.060
G11     60.0           35.5                5.1 +/-    0.97       8.0 +/-    0.97  0.060 / 0.080
G13     285.7          37.8                2.7 +/-    1.61       4.0 +/-    1.61  0.060 / 0.090
G17     220.5          62.4                6.0 +/-    1.11       6.7 +/-    1.11  0.030 / 0.020
G18     55.6           21.2                5.0 +/-    3.41      10.6 +/-    3.41  0.030 / 0.020
G19     218.3          29.2                4.4 +/-    2.40       7.8 +/-    2.40  0.060 / 0.110
G28     0.9            61.2                4.0 +/-    0.66       4.5 +/-    0.66  0.050 / 0.120
G30     121.7          72.1                5.6 +/-    0.71       5.9 +/-    0.71  0.210 / 0.240