PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-05:42:50
G01     319.4          17.9                4.3 +/-    0.76       9.9 +/-    0.76  0.090 / 0.060
G08     260.4          14.1                7.9 +/-    1.03      20.0 +/-    1.03  0.120 / 0.060
G10     78.6           52.6                3.2 +/-    0.83       4.0 +/-    0.83  0.300 / 0.110
G11     304.2          22.3                3.1 +/-    1.24       6.5 +/-    1.24  0.320 / 0.150
G14     291.8          70.6                5.6 +/-    0.69       5.9 +/-    0.69  0.040 / 0.010
G18     305.4          40.5                5.2 +/-    0.61       7.5 +/-    0.61  0.040 / 0.010
G20     104.3          30.1                5.9 +/-    1.05      10.4 +/-    1.05  0.040 / 0.050
G27     225.7          10.1                4.5 +/-   21.19      12.5 +/-   21.19  0.050 / 0.060
G31     175.3          41.2                8.1 +/-    1.15      11.5 +/-    1.15  0.130 / 0.110
G32     358.6          69.8                3.0 +/-    0.57       3.2 +/-    0.57  0.150 / 0.080