PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-10:28:10
G01     311.4          30.4                6.1 +/-    1.62      10.6 +/-    1.62  0.060 / 0.150
G10     100.2          42.6                5.3 +/-    0.48       7.4 +/-    0.48  0.070 / 0.190
G11     286.9          27.7                5.4 +/-    1.30       9.9 +/-    1.30  0.100 / 0.120
G14     345.6          69.3                5.6 +/-    0.82       5.9 +/-    0.82  0.090 / 0.130
G18     283.4          50.0                7.6 +/-    1.14       9.5 +/-    1.14  0.050 / 0.050
G20     117.1          17.9                5.0 +/-    1.22      11.6 +/-    1.22  0.040 / 0.060
G22     309.0          25.8                4.7 +/-    0.72       9.1 +/-    0.72  0.090 / 0.180
G25     87.0           14.4                3.4 +/-    1.03       8.5 +/-    1.03  0.090 / 0.230
G31     171.3          58.2                7.8 +/-    1.21       9.0 +/-    1.21  0.040 / 0.050
G32     22.8           60.2                5.5 +/-    0.62       6.2 +/-    0.62  0.050 / 0.050