PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-07:12:40
G08     315.7          15.6                3.0 +/-    2.90       7.5 +/-    2.90  0.040 / 0.040
G10     319.9          58.1                3.7 +/-    0.68       4.3 +/-    0.68  0.050 / 0.040
G14     214.0          24.3                8.6 +/-    1.35      17.2 +/-    1.35  0.110 / 0.360
G15     45.8           15.6                1.9 +/-    0.80       4.5 +/-    0.80  0.140 / 0.290
G20     22.8           62.9                3.8 +/-    0.58       4.2 +/-    0.58  0.050 / 0.080
G21     125.5          62.6                6.4 +/-    0.61       7.1 +/-    0.61  0.060 / 0.080
G24     81.9           29.5                4.8 +/-    0.74       8.5 +/-    0.74  0.040 / 0.050
G27     286.7          37.2                6.0 +/-    1.66       9.1 +/-    1.66  0.040 / 0.040
G32     217.5          40.2                9.0 +/-    1.37      13.1 +/-    1.37  0.180 / 0.530