PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-10:12:50
G01     289.0          40.5                5.6 +/-    1.04       8.1 +/-    1.04  0.050 / 0.090
G03     312.7          19.5                5.0 +/-    1.29      11.1 +/-    1.29  0.040 / 0.090
G10     120.9          27.6                5.4 +/-    1.04      10.0 +/-    1.04  0.040 / 0.060
G11     264.6          25.3                8.8 +/-    1.11      17.0 +/-    1.11  0.040 / 0.060
G14     18.3           60.8                5.1 +/-    0.24       5.8 +/-    0.24  0.040 / 0.080
G18     251.8          46.8                8.8 +/-    1.16      11.5 +/-    1.16  0.050 / 0.060
G22     314.8          43.8                5.3 +/-    1.17       7.2 +/-    1.17  0.080 / 0.200
G25     65.9           19.0                2.7 +/-    0.62       6.0 +/-    0.62  0.120 / 0.230
G31     106.1          79.0                6.3 +/-    0.71       6.4 +/-    0.71  0.060 / 0.110
G32     53.7           39.5                4.4 +/-    0.94       6.4 +/-    0.94  0.060 / 0.090