PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-06:27:50
G08     305.4          20.0                7.5 +/-    1.25      16.5 +/-    1.25  0.060 / 0.160
G10     345.1          61.7                3.4 +/-    0.70       3.8 +/-    0.70  0.070 / 0.190
G14     222.2          32.8                6.6 +/-    0.67      11.0 +/-    0.67  0.050 / 0.070
G20     64.4           47.9                3.7 +/-    0.76       4.8 +/-    0.76  0.030 / 0.070
G21     140.2          51.2                8.0 +/-    1.05       9.9 +/-    1.05  0.080 / 0.100
G24     66.0           28.8                3.4 +/-    0.95       6.1 +/-    0.95  0.050 / 0.100
G27     266.0          35.9                7.8 +/-    1.25      12.2 +/-    1.25  0.030 / 0.030
G32     230.5          60.6                7.9 +/-    0.43       8.9 +/-    0.43  0.030 / 0.030