PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/25-09:57:40
G01     93.1           31.1                5.5 +/-    0.55       9.4 +/-    0.55  0.020 / 0.020
G07     123.4          46.8                6.9 +/-    0.91       9.0 +/-    0.91  0.030 / 0.030
G11     70.0           40.0                4.8 +/-    1.20       6.9 +/-    1.20  0.070 / 0.120
G13     297.0          35.5                5.2 +/-    1.38       8.2 +/-    1.38  0.080 / 0.120
G17     212.1          53.0                7.1 +/-    0.55       8.6 +/-    0.55  0.060 / 0.200
G18     64.8           23.6                4.3 +/-    0.83       8.7 +/-    0.83  0.060 / 0.190
G19     213.9          20.8                5.7 +/-    1.89      12.2 +/-    1.89  0.050 / 0.060
G28     341.9          61.8                3.5 +/-    0.66       3.9 +/-    0.66  0.050 / 0.060
G30     89.2           79.2                4.9 +/-    0.50       5.0 +/-    0.50  0.040 / 0.070