PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-08:28:00
G08     266.1          16.3                6.8 +/-    2.11      16.5 +/-    2.11  0.040 / 0.060
G10     68.3           56.8                3.7 +/-    0.72       4.4 +/-    0.72  0.050 / 0.060
G11     309.5          18.7                4.8 +/-    1.78      10.8 +/-    1.78  0.220 / 0.390
G14     269.2          64.4                3.7 +/-    0.84       4.1 +/-    0.84  0.230 / 0.450
G18     310.4          34.3                6.6 +/-    1.75      10.6 +/-    1.75  0.090 / 0.340
G20     104.9          18.6                4.8 +/-    0.74      11.0 +/-    0.74  0.180 / 0.410
G21     155.4          11.9                3.0 +/-    2.09       8.1 +/-    2.09  0.030 / 0.040
G27     228.6          13.1                3.7 +/-   21.13       9.6 +/-   21.13  0.030 / 0.030
G31     175.8          36.4                6.2 +/-    1.04       9.6 +/-    1.04  0.140 / 0.350
G32     357.1          71.2                5.4 +/-    0.60       5.7 +/-    0.60  0.170 / 0.350