PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/15-13:58:10
G02     200.6          13.2                5.4 +/-    2.72      14.1 +/-    2.72  0.120 / 0.240
G06     171.2          48.5                9.1 +/-    1.03      11.7 +/-    1.03  0.130 / 0.220
G13     229.7          16.9                5.6 +/-    1.55      13.2 +/-    1.55  0.120 / 0.130
G17     8.1            66.7                6.5 +/-    1.03       7.1 +/-    1.03  0.100 / 0.140
G19     309.2          72.2                7.0 +/-    0.51       7.3 +/-    0.51  0.030 / 0.020
G24     313.2          24.9                6.1 +/-    1.36      11.9 +/-    1.36  0.030 / 0.030
G28     76.1           47.8                6.8 +/-    0.64       8.8 +/-    0.64  0.030 / 0.030
G30     156.4          19.7                7.3 +/-    1.78      16.1 +/-    1.78  0.030 / 0.030