PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-07:27:40
G10     256.7          31.1                7.6 +/-    2.01      13.0 +/-    2.01  0.140 / 0.320
G13     48.2           26.1                5.0 +/-    2.40       9.5 +/-    2.40  0.080 / 0.250
G15     72.3           54.5                6.1 +/-    0.40       7.3 +/-    0.40  0.140 / 0.210
G16     288.8          14.6                3.0 +/-    1.72       7.5 +/-    1.72  0.610 / 0.400
G20     15.7           65.8                4.4 +/-    0.50       4.8 +/-    0.50  0.050 / 0.040
G21     343.7          65.2                5.3 +/-    0.49       5.8 +/-    0.49  0.050 / 0.040
G26     260.5          12.7                5.7 +/-    2.51      15.0 +/-    2.51  0.040 / 0.040
G27     321.9          11.2               -9.2 +/-   19.19     -25.1 +/-   19.19  0.050 / 0.050
G29     166.4          42.2                6.3 +/-    0.66       8.9 +/-    0.66  0.060 / 0.050