PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/15-13:57:50
G02     41.9           47.9                5.9 +/-    0.76       7.7 +/-    0.76  0.020 / 0.020
G05     124.0          67.9                9.7 +/-    0.43      10.4 +/-    0.43  0.020 / 0.020
G06     57.8           12.8                4.5 +/-    2.60      11.9 +/-    2.60  0.080 / 0.120
G12     194.3          59.2               10.2 +/-    0.52      11.7 +/-    0.52  0.110 / 0.090
G20     200.4          33.7               12.3 +/-    0.95      19.9 +/-    0.95  0.030 / 0.030
G25     280.4          58.1                5.4 +/-    1.83       6.3 +/-    1.83  0.030 / 0.030
G29     316.4          39.5                4.2 +/-    1.26       6.2 +/-    1.26  0.030 / 0.040