PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-20:12:50
G01     57.3           29.5               11.1 +/-    2.08      19.6 +/-    2.08  0.160 / 0.260
G07     143.5          20.1               13.2 +/-    1.92      28.9 +/-    1.92  0.180 / 0.310
G11     47.4           22.3                9.8 +/-    1.90      20.4 +/-    1.90  0.040 / 0.040
G13     259.4          34.1               14.7 +/-    1.02      23.7 +/-    1.02  0.040 / 0.050
G15     291.6          16.2               12.0 +/-    1.25      29.0 +/-    1.25  0.110 / 0.160
G17     262.3          75.0               12.9 +/-    0.41      13.3 +/-    0.41  0.130 / 0.210
G18     40.9           11.4               10.2 +/-    1.71      27.5 +/-    1.71  0.050 / 0.050
G19     235.5          51.8               14.2 +/-    2.00      17.5 +/-    2.00  0.040 / 0.060
G28     40.7           55.6               10.4 +/-    1.68      12.3 +/-    1.68  0.180 / 0.350
G30     145.3          48.5               13.0 +/-    0.46      16.7 +/-    0.46  0.180 / 0.290