PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/31-14:13:00
G02     202.1          21.6                9.5 +/-    2.44      20.2 +/-    2.44  0.140 / 0.220
G06     164.7          60.2               10.0 +/-    0.92      11.3 +/-    0.92  0.200 / 0.300
G12     303.5          12.7                5.1 +/-   13.52      13.3 +/-   13.52  0.070 / 0.080
G17     28.8           54.9                8.7 +/-    0.82      10.3 +/-    0.82  0.100 / 0.120
G19     322.9          69.9                8.5 +/-    0.67       9.0 +/-    0.67  0.380 / 0.370
G24     305.9          34.0                6.8 +/-    2.40      11.0 +/-    2.40  0.320 / 0.400
G28     92.1           37.6                8.7 +/-    1.03      13.2 +/-    1.03  0.050 / 0.040
G30     158.2          12.6                7.9 +/-    1.29      20.7 +/-    1.29  0.040 / 0.040