PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-14:58:00
G01     50.4           25.5                8.3 +/-    2.91      16.0 +/-    2.91  0.150 / 0.270
G06     177.3          23.6                8.8 +/-    1.12      17.9 +/-    1.12  0.140 / 0.370
G07     145.0          10.5                9.8 +/-    2.25      27.1 +/-    2.25  0.040 / 0.030
G11     44.8           16.7                5.8 +/-    2.68      13.9 +/-    2.68  0.040 / 0.030
G13     250.6          31.8                8.0 +/-    2.26      13.4 +/-    2.26  0.040 / 0.050
G15     284.8          15.8                8.1 +/-    1.48      19.7 +/-    1.48  0.040 / 0.060
G17     290.1          78.0                9.4 +/-    0.53       9.6 +/-    0.53  0.040 / 0.040
G19     244.2          60.3                9.2 +/-    0.83      10.4 +/-    0.83  0.040 / 0.040
G28     41.3           57.0                8.8 +/-    1.08      10.3 +/-    1.08  0.120 / 0.180
G30     148.9          41.7                9.7 +/-    1.07      13.7 +/-    1.07  0.110 / 0.210