PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-12:12:50
G02     202.4          22.9                5.2 +/-    1.69      10.7 +/-    1.69  0.060 / 0.100
G06     166.3          60.7                7.5 +/-    0.88       8.5 +/-    0.88  0.080 / 0.080
G12     303.4          11.4               -2.9 +/-   12.00      -8.0 +/-   12.00  0.220 / 0.500
G17     29.8           54.1                4.7 +/-    0.67       5.7 +/-    0.67  0.280 / 0.540
G19     326.1          69.5                4.8 +/-    0.94       5.1 +/-    0.94  0.120 / 0.230
G24     303.9          35.6                4.1 +/-    1.94       6.5 +/-    1.94  0.160 / 0.250
G28     93.3           37.4                5.9 +/-    0.91       9.0 +/-    0.91  0.060 / 0.030
G30     158.2          11.0                5.2 +/-    3.89      14.2 +/-    3.89  0.050 / 0.030