PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/13-17:42:30
G01     319.0          19.7                7.2 +/-    2.48      16.0 +/-    2.48  0.040 / 0.050
G08     257.6          14.1                7.8 +/-    2.83      19.8 +/-    2.83  0.040 / 0.060
G10     79.4           51.7                8.8 +/-    0.73      10.9 +/-    0.73  0.120 / 0.460
G11     307.4          19.2                6.9 +/-    1.16      15.4 +/-    1.16  0.180 / 0.440
G14     282.4          67.9                8.4 +/-    0.59       9.0 +/-    0.59  0.050 / 0.030
G20     105.9          26.6                9.1 +/-    1.51      17.1 +/-    1.51  0.050 / 0.040
G31     176.6          39.9                9.8 +/-    0.91      14.3 +/-    0.91  0.060 / 0.080
G32     9.5            67.4                7.6 +/-    0.38       8.1 +/-    0.38  0.060 / 0.080