PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-15:43:00
G02     200.8          15.2               13.8 +/-    2.14      34.3 +/-    2.14  0.110 / 0.190
G06     172.3          50.2               10.1 +/-    0.60      12.7 +/-    0.60  0.110 / 0.250
G13     231.5          15.5               11.7 +/-    2.65      28.8 +/-    2.65  0.210 / 0.180
G17     22.0           60.4                8.9 +/-    0.97      10.1 +/-    0.97  0.100 / 0.160
G19     319.0          72.0                9.6 +/-    0.65      10.0 +/-    0.65  0.200 / 0.310
G24     313.2          25.7                5.6 +/-    1.19      10.7 +/-    1.19  0.130 / 0.320
G28     84.6           41.3                7.9 +/-    1.16      11.2 +/-    1.16  0.040 / 0.030
G30     157.1          19.5               11.2 +/-    1.94      25.0 +/-    1.94  0.030 / 0.030