PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-12:57:40
G01     39.3           13.4                1.9 +/-    0.91       5.0 +/-    0.91  0.070 / 0.120
G06     172.6          44.5                7.8 +/-    0.72      10.6 +/-    0.72  0.070 / 0.160
G13     234.0          19.4                6.2 +/-    1.62      13.8 +/-    1.62  0.090 / 0.160
G17     11.9           66.3                3.5 +/-    0.46       3.8 +/-    0.46  0.090 / 0.160
G19     278.9          67.2                4.0 +/-    0.60       4.3 +/-    0.60  0.080 / 0.230
G24     314.0          24.6                2.8 +/-    1.15       5.5 +/-    1.15  0.080 / 0.340
G28     76.0           45.5                3.7 +/-    0.80       5.0 +/-    0.80  0.110 / 0.160
G30     156.1          25.0                6.4 +/-    1.86      12.5 +/-    1.86  0.120 / 0.180