PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/13-15:27:50
G02     70.8           23.0                7.8 +/-    2.40      16.0 +/-    2.40  0.020 / 0.040
G05     47.4           50.6                7.5 +/-    0.46       9.4 +/-    0.46  0.040 / 0.030
G12     183.3          20.2               10.7 +/-    1.87      23.4 +/-    1.87  0.080 / 0.170
G13     118.6          24.0               11.9 +/-    1.44      23.9 +/-    1.44  0.080 / 0.130
G15     155.5          23.2               11.4 +/-    2.01      23.2 +/-    2.01  0.040 / 0.030
G18     222.2          13.6               11.0 +/-    2.18      28.3 +/-    2.18  0.030 / 0.030
G20     220.2          73.1               11.1 +/-    0.64      11.5 +/-    0.64  0.080 / 0.140
G21     283.6          28.5                8.3 +/-    1.02      14.9 +/-    1.02  0.090 / 0.130
G25     220.2          40.7               11.4 +/-    2.60      16.4 +/-    2.60  0.070 / 0.060
G29     347.8          73.1                9.1 +/-    0.62       9.5 +/-    0.62  0.060 / 0.070