PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/03-23:42:40
G01     228.3          18.9                8.5 +/-    2.88      19.2 +/-    2.88  0.030 / 0.030
G03     293.9          65.5                6.9 +/-    0.59       7.5 +/-    0.59  0.030 / 0.030
G14     84.6           25.4                7.4 +/-    2.06      14.4 +/-    2.06  0.060 / 0.090
G16     154.2          40.1               11.2 +/-    0.70      16.3 +/-    0.70  0.060 / 0.070
G22     226.8          72.9                8.3 +/-    0.48       8.6 +/-    0.48  0.060 / 0.050
G23     304.8          34.5                6.1 +/-    1.73       9.8 +/-    1.73  0.040 / 0.060
G26     106.9          54.1                9.2 +/-    0.67      11.0 +/-    0.67  0.160 / 0.340
G31     43.3           37.0                5.9 +/-    1.37       9.1 +/-    1.37  0.170 / 0.220