PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-21:12:50
G01     56.7           29.1               10.0 +/-    1.13      17.9 +/-    1.13  0.090 / 0.310
G06     181.0          15.1              -18.6 +/-   27.32     -46.1 +/-   27.32  0.150 / 0.250
G07     142.6          14.1               14.9 +/-    2.77      37.8 +/-    2.77  0.090 / 0.120
G11     46.4           20.6                9.3 +/-    2.79      20.1 +/-    2.79  0.080 / 0.160
G13     258.2          34.8               14.9 +/-    1.20      23.7 +/-    1.20  0.120 / 0.090
G15     290.3          16.6               11.5 +/-    1.49      27.4 +/-    1.49  0.080 / 0.100
G17     274.1          78.8               14.3 +/-    0.54      14.5 +/-    0.54  0.040 / 0.050
G19     235.1          53.5               14.9 +/-    2.04      18.1 +/-    2.04  0.040 / 0.050
G28     33.4           58.0               10.7 +/-    0.48      12.4 +/-    0.48  0.040 / 0.050
G30     145.3          47.9               14.6 +/-    0.56      18.8 +/-    0.56  0.050 / 0.050