PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-09:27:50
G08     269.2          17.2                6.0 +/-    1.64      14.3 +/-    1.64  0.040 / 0.070
G10     63.7           57.9                4.2 +/-    0.37       4.9 +/-    0.37  0.040 / 0.060
G11     311.5          17.0               -0.8 +/-    9.85      -1.8 +/-    9.85  0.130 / 0.500
G14     264.4          63.1                4.5 +/-    0.83       5.0 +/-    0.83  0.120 / 0.460
G18     312.0          32.1                4.6 +/-    2.90       7.7 +/-    2.90  0.210 / 0.200
G20     105.6          12.2                3.1 +/-    3.19       8.1 +/-    3.19  0.180 / 0.270
G21     155.0          14.1                5.5 +/-    1.53      14.0 +/-    1.53  0.030 / 0.030
G27     230.3          14.7                5.9 +/-    1.29      14.7 +/-    1.29  0.030 / 0.030
G31     176.4          33.7                5.6 +/-    1.25       9.2 +/-    1.25  0.130 / 0.270
G32     350.1          72.8                4.6 +/-    0.56       4.8 +/-    0.56  0.130 / 0.220