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                7.6 +/-    1.52      15.5 +/-    1.52  0.030 / 0.040
G05     47.4           50.6                7.8 +/-    1.17       9.8 +/-    1.17  0.020 / 0.040
G12     183.3          20.2               11.1 +/-    1.75      24.4 +/-    1.75  0.070 / 0.160
G13     118.6          24.0               12.2 +/-    1.38      24.5 +/-    1.38  0.160 / 0.150
G15     155.5          23.2               13.2 +/-    1.54      27.0 +/-    1.54  0.030 / 0.040
G18     222.2          13.6                9.9 +/-    1.22      25.4 +/-    1.22  0.040 / 0.040
G20     220.2          73.1               11.5 +/-    0.48      12.0 +/-    0.48  0.070 / 0.200
G21     283.6          28.5                7.4 +/-    1.65      13.5 +/-    1.65  0.060 / 0.190
G25     220.2          40.7               10.9 +/-    0.72      15.7 +/-    0.72  0.090 / 0.290
G29     347.8          73.1                9.8 +/-    0.46      10.2 +/-    0.46  0.080 / 0.220