PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/17-17:57:40
G02     84.2           12.7               11.8 +/-    2.56      31.0 +/-    2.56  0.040 / 0.090
G05     44.7           35.0                9.2 +/-    0.70      14.6 +/-    0.70  0.040 / 0.060
G13     100.4          33.8               12.4 +/-    1.17      20.1 +/-    1.17  0.050 / 0.120
G15     143.8          38.3               13.6 +/-    0.78      20.3 +/-    0.78  0.060 / 0.110
G18     231.6          28.3               13.5 +/-    1.48      24.4 +/-    1.48  0.120 / 0.510
G20     343.4          83.9                9.4 +/-    0.37       9.4 +/-    0.37  0.120 / 0.600
G21     298.3          38.0               11.5 +/-    0.95      17.3 +/-    0.95  0.130 / 0.060
G25     207.2          24.4               12.3 +/-    1.42      24.3 +/-    1.42  0.070 / 0.050
G26     309.5          15.6                8.8 +/-    4.22      21.6 +/-    4.22  0.140 / 0.250
G29     99.6           84.4               11.2 +/-    0.57      11.3 +/-    0.57  0.150 / 0.270