PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-10:12:50
G08     277.3          19.5                4.4 +/-    1.67       9.8 +/-    1.67  0.260 / 0.360
G10     49.3           60.7                5.0 +/-    0.87       5.6 +/-    0.87  0.210 / 0.460
G14     251.9          58.7                5.0 +/-    1.21       5.8 +/-    1.21  0.040 / 0.050
G18     315.2          25.7                3.4 +/-    1.54       6.5 +/-    1.54  0.050 / 0.060
G20     102.6          9.7                 5.4 +/-    1.29      15.1 +/-    1.29  0.430 / 0.470
G21     153.5          20.9                4.3 +/-    0.88       9.3 +/-    0.88  0.420 / 0.390
G24     42.3           14.3                2.6 +/-    3.51       6.7 +/-    3.51  0.100 / 0.560
G27     235.8          19.7                5.3 +/-    4.36      11.7 +/-    4.36  0.200 / 0.140
G31     178.2          25.9                3.8 +/-    1.68       7.2 +/-    1.68  0.100 / 0.220
G32     322.4          76.2                6.0 +/-    0.52       6.1 +/-    0.52  0.170 / 0.240