PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-13:12:50
G01     108.0          24.0                7.5 +/-    1.28      15.1 +/-    1.28  0.030 / 0.040
G07     106.1          56.1                7.4 +/-    0.96       8.8 +/-    0.96  0.030 / 0.030
G08     42.5           24.7                6.7 +/-    1.86      13.2 +/-    1.86  0.040 / 0.050
G09     175.6          16.5                5.0 +/-    1.98      12.1 +/-    1.98  0.050 / 0.060
G11     91.7           43.6                8.7 +/-    0.97      11.9 +/-    0.97  0.040 / 0.060
G13     310.7          28.4                5.2 +/-    2.00       9.4 +/-    2.00  0.050 / 0.070
G17     205.0          32.6                7.0 +/-    2.34      11.6 +/-    2.34  0.110 / 0.140
G18     81.5           23.8                4.1 +/-    1.15       8.3 +/-    1.15  0.080 / 0.120
G28     302.4          57.7                6.5 +/-    1.17       7.5 +/-    1.17  0.140 / 0.310
G30     20.1           77.5                6.6 +/-    0.61       6.7 +/-    0.61  0.160 / 0.360