PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/24-12:42:40
G02     72.1           21.5                4.6 +/-    2.52       9.7 +/-    2.52  0.030 / 0.040
G05     46.6           47.8                5.1 +/-    0.66       6.6 +/-    0.66  0.040 / 0.030
G12     183.2          19.2                5.6 +/-    1.27      12.6 +/-    1.27  0.040 / 0.040
G13     117.2          24.8                8.5 +/-    1.52      16.7 +/-    1.52  0.040 / 0.040
G15     154.3          24.6                5.9 +/-    3.18      11.6 +/-    3.18  0.090 / 0.140
G18     222.8          15.4                3.1 +/-    6.80       7.7 +/-    6.80  0.140 / 0.120
G20     222.6          72.6                7.3 +/-    0.43       7.6 +/-    0.43  0.100 / 0.190
G21     285.3          30.2                5.8 +/-    2.14      10.1 +/-    2.14  0.080 / 0.170
G25     220.3          40.1                6.2 +/-    1.88       9.0 +/-    1.88  0.120 / 0.080
G29     344.9          72.5                5.2 +/-    0.69       5.5 +/-    0.69  0.060 / 0.070