PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-14:58:00
G02     34.6           54.5                8.7 +/-    0.31      10.5 +/-    0.31  0.030 / 0.030
G05     143.2          61.8               11.2 +/-    0.64      12.5 +/-    0.64  0.030 / 0.040
G06     53.6           17.7                6.1 +/-    0.47      14.2 +/-    0.47  0.020 / 0.030
G12     201.4          67.7                6.9 +/-    1.06       7.3 +/-    1.06  0.020 / 0.040
G20     198.9          26.3                9.1 +/-    1.30      17.3 +/-    1.30  0.050 / 0.050
G25     294.1          55.2                8.5 +/-    0.69      10.1 +/-    0.69  0.050 / 0.060
G29     310.9          33.7                5.2 +/-    0.72       8.5 +/-    0.72  0.040 / 0.090