PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/10-08:27:50
G02     51.9           38.5                1.6 +/-    0.50       2.4 +/-    0.50  0.050 / 0.090
G05     80.6           67.7                3.7 +/-    0.39       4.0 +/-    0.39  0.050 / 0.090
G12     189.2          46.4                7.5 +/-    1.41      10.0 +/-    1.41  0.020 / 0.030
G20     205.3          42.3                5.9 +/-    1.01       8.3 +/-    1.01  0.030 / 0.030
G21     263.0          12.3                4.1 +/-    4.60      10.8 +/-    4.60  0.060 / 0.060
G25     258.9          57.5                5.6 +/-    0.66       6.5 +/-    0.66  0.040 / 0.060
G29     322.0          45.7                1.6 +/-    1.05       2.1 +/-    1.05  0.190 / 0.480