PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-09:28:00
G07     325.6          55.1                1.7 +/-    0.64       2.1 +/-    0.64  0.230 / 0.550
G08     104.2          49.7                5.0 +/-    1.66       6.3 +/-    1.66  0.290 / 0.550
G09     190.3          77.1                3.2 +/-    0.61       3.2 +/-    0.61  0.030 / 0.060
G11     147.9          10.5               -4.6 +/-   13.43     -12.8 +/-   13.43  0.030 / 0.050
G23     154.0          48.3                6.5 +/-    1.66       8.4 +/-    1.66  0.080 / 0.270
G27     61.0           34.4                2.9 +/-    1.03       4.7 +/-    1.03  0.090 / 0.160
G28     233.1          24.9                5.3 +/-    1.98      10.4 +/-    1.98  0.030 / 0.040
G30     296.8          30.0                3.2 +/-    1.59       5.7 +/-    1.59  0.030 / 0.040