PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-06:27:30
G10     293.1          50.9                6.4 +/-    1.28       8.0 +/-    1.28  0.050 / 0.040
G15     46.6           30.1                2.9 +/-    0.83       5.1 +/-    0.83  0.050 / 0.040
G20     344.2          65.3                4.1 +/-    0.62       4.5 +/-    0.62  0.060 / 0.100
G21     86.7           74.7                6.4 +/-    0.51       6.7 +/-    0.51  0.070 / 0.100
G24     100.6          25.0                5.6 +/-    1.05      11.0 +/-    1.05  0.050 / 0.050
G27     305.6          31.6                5.3 +/-    1.15       9.0 +/-    1.15  0.040 / 0.040
G32     209.8          24.2                7.5 +/-    2.19      14.8 +/-    2.19  0.070 / 0.120