PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/30-17:28:00
G05     46.4           25.1                9.9 +/-    1.12      19.3 +/-    1.12  0.050 / 0.100
G13     87.2           36.9               11.5 +/-    0.77      17.6 +/-    0.77  0.050 / 0.110
G15     133.0          47.1               13.6 +/-    0.97      17.8 +/-    0.97  0.080 / 0.210
G18     239.3          37.3               14.3 +/-    2.74      21.7 +/-    2.74  0.080 / 0.200
G20     16.9           74.6               12.1 +/-    0.50      12.5 +/-    0.50  0.040 / 0.100
G21     308.3          44.8               10.9 +/-    0.95      14.7 +/-    0.95  0.050 / 0.080
G25     202.1          15.8               14.7 +/-    1.54      35.9 +/-    1.54  0.030 / 0.040
G26     299.4          18.4               11.2 +/-    0.97      25.7 +/-    0.97  0.040 / 0.040
G29     143.6          73.7               14.4 +/-    0.61      15.0 +/-    0.61  0.090 / 0.220