PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-15:12:40
G01     47.9           23.7                7.7 +/-    1.55      15.6 +/-    1.55  0.040 / 0.040
G06     176.7          26.6               10.6 +/-    0.91      20.0 +/-    0.91  0.040 / 0.050
G11     44.2           14.0                6.3 +/-    1.59      16.0 +/-    1.59  0.120 / 0.340
G13     247.4          30.1               11.2 +/-    1.18      19.5 +/-    1.18  0.110 / 0.410
G15     281.8          15.3                8.1 +/-    2.88      20.0 +/-    2.88  0.030 / 0.020
G17     306.9          78.0               11.4 +/-    0.53      11.6 +/-    0.53  0.040 / 0.060
G19     249.6          62.8               10.8 +/-    0.57      11.9 +/-    0.57  0.050 / 0.040
G28     46.6           56.0               10.5 +/-    0.56      12.3 +/-    0.56  0.030 / 0.040
G30     150.2          38.5                8.8 +/-    0.71      13.1 +/-    0.71  0.110 / 0.180