PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/21-09:58:00
G10     284.3          46.6                4.9 +/-    2.85       6.5 +/-    2.85  0.070 / 0.080
G15     48.3           35.3                4.8 +/-    0.99       7.5 +/-    0.99  0.070 / 0.080
G20     58.1           36.5                3.9 +/-    1.52       6.1 +/-    1.52  0.030 / 0.040
G21     62.3           76.8                4.9 +/-    0.33       5.1 +/-    0.33  0.040 / 0.040
G24     107.5          22.4                4.3 +/-    1.07       8.9 +/-    1.07  0.110 / 0.100
G27     308.6          30.0                5.0 +/-    1.19       8.8 +/-    1.19  0.080 / 0.070
G29     168.4          15.6                5.7 +/-    1.84      14.0 +/-    1.84  0.120 / 0.120
G32     207.2          24.1                6.6 +/-    1.51      13.2 +/-    1.51  0.130 / 0.110