PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-16:57:50
G10     246.1          22.0               11.9 +/-    1.88      24.9 +/-    1.88  0.040 / 0.040
G13     60.1           33.8               11.2 +/-    1.41      18.2 +/-    1.41  0.050 / 0.040
G15     95.8           57.1               13.9 +/-    0.96      16.2 +/-    0.96  0.270 / 0.330
G16     306.5          12.8                8.4 +/-    2.28      22.0 +/-    2.28  0.200 / 0.280
G18     262.5          53.8               10.8 +/-    2.71      13.0 +/-    2.71  0.050 / 0.040
G20     37.3           55.0               10.3 +/-    0.88      12.3 +/-    0.88  0.060 / 0.040
G21     332.4          59.4               10.0 +/-    0.86      11.5 +/-    0.86  0.060 / 0.110
G26     276.9          17.0                9.9 +/-    2.32      23.4 +/-    2.32  0.050 / 0.090
G29     160.2          50.4               14.3 +/-    0.58      17.9 +/-    0.58  0.170 / 0.400