PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-15:12:30
G02     40.4           49.3                8.2 +/-    0.81      10.4 +/-    0.81  0.030 / 0.030
G05     129.7          67.1               10.8 +/-    0.75      11.7 +/-    0.75  0.020 / 0.030
G06     57.4           12.8                6.6 +/-    0.82      17.4 +/-    0.82  0.030 / 0.040
G12     194.8          60.3                9.6 +/-    1.17      10.9 +/-    1.17  0.030 / 0.050
G20     199.9          33.1               11.3 +/-    2.12      18.6 +/-    2.12  0.030 / 0.060
G25     281.9          58.2               10.2 +/-    0.92      11.7 +/-    0.92  0.040 / 0.040
G29     315.7          38.9                7.8 +/-    1.47      11.5 +/-    1.47  0.040 / 0.080