PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/20-23:42:50
G01     64.6           31.9                9.8 +/-    1.71      16.5 +/-    1.71  0.050 / 0.080
G06     181.7          10.8               -9.9 +/-   37.78     -27.1 +/-   37.78  0.050 / 0.080
G07     140.4          26.5               12.7 +/-    1.73      24.0 +/-    1.73  0.040 / 0.030
G11     51.7           29.0                9.2 +/-    1.50      16.5 +/-    1.50  0.030 / 0.030
G13     268.3          36.3               12.4 +/-    1.62      19.2 +/-    1.62  0.120 / 0.250
G15     297.2          16.4                9.4 +/-    1.51      22.6 +/-    1.51  0.100 / 0.300
G17     242.5          70.3               11.6 +/-    0.67      12.2 +/-    0.67  0.030 / 0.050
G19     228.8          46.8               12.4 +/-    2.29      16.2 +/-    2.29  0.040 / 0.050
G28     29.9           57.7               11.1 +/-    0.92      12.9 +/-    0.92  0.070 / 0.100
G30     140.1          53.4               12.4 +/-    0.53      15.0 +/-    0.53  0.080 / 0.110