PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/25-11:27:30
G07     326.1          55.3                2.6 +/-    1.33       3.1 +/-    1.33  0.090 / 0.120
G08     105.4          50.2                4.8 +/-    0.59       6.1 +/-    0.59  0.080 / 0.100
G09     192.7          77.1                0.4 +/-    0.82       0.4 +/-    0.82  0.040 / 0.070
G11     148.1          10.6               -3.7 +/-   14.45     -10.2 +/-   14.45  0.050 / 0.070
G23     153.6          46.1                4.4 +/-    1.61       5.8 +/-    1.61  0.290 / 0.540
G27     60.1           34.0                2.9 +/-    0.46       4.7 +/-    0.46  0.200 / 0.530
G28     233.6          25.6                4.7 +/-    1.67       9.1 +/-    1.67  0.080 / 0.150
G30     297.7          31.0                2.5 +/-    1.02       4.2 +/-    1.02  0.070 / 0.190