PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/18-07:13:10
G01     96.7           28.7                4.2 +/-    1.27       7.6 +/-    1.27  0.040 / 0.030
G07     117.6          51.0                6.4 +/-    0.58       8.0 +/-    0.58  0.040 / 0.040
G08     41.7           14.6                1.0 +/-    1.31       2.6 +/-    1.31  0.030 / 0.040
G11     80.2           44.4                6.0 +/-    0.60       8.2 +/-    0.60  0.030 / 0.050
G13     301.8          34.4                4.3 +/-    1.15       6.9 +/-    1.15  0.040 / 0.080
G17     208.6          44.9                7.3 +/-    2.04       9.8 +/-    2.04  0.050 / 0.070
G19     210.3          22.2                4.3 +/-    1.87       9.0 +/-    1.87  0.050 / 0.130
G28     317.6          59.6                4.2 +/-    0.66       4.8 +/-    0.66  0.070 / 0.120
G30     51.5           81.1                4.2 +/-    0.70       4.2 +/-    0.70  0.080 / 0.060