PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-04:57:50
G01     316.2          23.7                6.2 +/-    0.92      12.4 +/-    0.92  0.290 / 0.340
G10     90.4           48.8               10.0 +/-    0.90      12.8 +/-    0.90  0.180 / 0.240
G11     295.9          26.0                8.4 +/-    1.65      16.1 +/-    1.65  0.150 / 0.130
G14     313.3          70.4                7.4 +/-    0.44       7.8 +/-    0.44  0.130 / 0.150
G18     296.9          44.9                8.2 +/-    5.25      11.1 +/-    5.25  0.050 / 0.050
G20     105.7          40.1                9.9 +/-    0.86      14.4 +/-    0.86  0.060 / 0.050
G22     304.5          16.2                6.9 +/-    3.92      16.6 +/-    3.92  0.100 / 0.210
G25     94.5           11.6                5.9 +/-    1.80      16.0 +/-    1.80  0.090 / 0.270
G31     171.4          52.0               12.1 +/-    0.60      14.9 +/-    0.60  0.110 / 0.210
G32     22.8           60.8                7.3 +/-    0.58       8.3 +/-    0.58  0.160 / 0.190