PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/14-13:27:50
G01     106.8          24.7                9.2 +/-    0.93      18.1 +/-    0.93  0.040 / 0.060
G07     108.0          55.0                8.2 +/-    0.97       9.8 +/-    0.97  0.040 / 0.050
G08     42.3           23.5                6.9 +/-    1.12      14.0 +/-    1.12  0.050 / 0.080
G09     175.4          15.4                6.4 +/-    1.29      15.7 +/-    1.29  0.050 / 0.080
G11     89.8           43.6                8.5 +/-    0.93      11.7 +/-    0.93  0.030 / 0.040
G13     309.7          29.2                6.8 +/-    1.27      12.0 +/-    1.27  0.030 / 0.030
G17     205.4          34.0                8.2 +/-    1.51      13.2 +/-    1.51  0.090 / 0.080
G18     80.2           24.0                5.9 +/-    2.09      11.9 +/-    2.09  0.070 / 0.070
G28     304.7          58.1                6.3 +/-    1.21       7.2 +/-    1.21  0.190 / 0.440
G30     26.5           78.1                7.7 +/-    0.66       7.9 +/-    0.66  0.150 / 0.250