PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-07:43:10
G10     267.5          38.3                5.2 +/-    1.50       7.7 +/-    1.50  0.160 / 0.440
G13     41.8           18.3                3.4 +/-    2.94       7.9 +/-    2.94  0.210 / 0.400
G15     58.0           47.6                4.5 +/-    0.56       5.8 +/-    0.56  0.180 / 0.160
G16     278.3          11.8                5.1 +/-    2.03      13.6 +/-    2.03  0.140 / 0.090
G20     30.7           58.9                4.8 +/-    1.07       5.5 +/-    1.07  0.140 / 0.140
G21     5.1            72.4                4.5 +/-    0.75       4.7 +/-    0.75  0.120 / 0.130
G24     120.0          14.5                5.0 +/-    1.60      12.6 +/-    1.60  0.040 / 0.050
G27     318.1          19.9                2.8 +/-    1.02       6.2 +/-    1.02  0.050 / 0.040
G29     168.1          30.5                4.1 +/-    1.49       7.1 +/-    1.49  0.040 / 0.040
G32     204.1          11.0              -12.7 +/-   19.56     -34.8 +/-   19.56  0.040 / 0.030