PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-19:13:10
G01     86.8           32.5               12.6 +/-    1.67      20.9 +/-    1.67  0.120 / 0.230
G07     128.1          43.4               16.2 +/-    0.49      22.3 +/-    0.49  0.160 / 0.170
G11     66.3           39.2               13.4 +/-    1.58      19.7 +/-    1.58  0.030 / 0.020
G13     291.3          36.7               13.1 +/-    1.75      20.1 +/-    1.75  0.030 / 0.030
G15     313.7          10.9               -1.2 +/-   24.72      -3.3 +/-   24.72  0.030 / 0.060
G17     217.4          53.1               16.4 +/-    1.13      20.0 +/-    1.13  0.040 / 0.040
G18     61.2           23.4               11.5 +/-    0.87      23.3 +/-    0.87  0.060 / 0.150
G19     216.2          28.4               16.0 +/-    1.92      29.1 +/-    1.92  0.080 / 0.140
G28     355.4          61.5               13.7 +/-    0.56      15.3 +/-    0.56  0.040 / 0.040
G30     113.9          73.0               16.1 +/-    0.51      16.8 +/-    0.51  0.030 / 0.050