PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/18-14:58:10
G02     17.0           67.9                6.6 +/-    0.83       7.1 +/-    0.83  0.030 / 0.070
G05     160.1          45.7               11.0 +/-    1.32      14.6 +/-    1.32  0.030 / 0.060
G06     45.9           30.1                6.1 +/-    1.01      10.6 +/-    1.01  0.250 / 0.600
G12     258.7          79.2                7.7 +/-    1.35       7.8 +/-    1.35  0.210 / 0.450
G19     88.5           17.5                8.9 +/-    1.19      20.9 +/-    1.19  0.150 / 0.340
G20     197.9          11.4                1.6 +/-   21.02       4.3 +/-   21.02  0.140 / 0.420
G24     219.8          13.6                9.7 +/-    2.57      24.8 +/-    2.57  0.040 / 0.030
G25     311.6          43.4                7.8 +/-    1.91      10.7 +/-    1.91  0.030 / 0.030
G29     298.8          21.9                7.1 +/-    1.43      14.8 +/-    1.43  0.060 / 0.090