PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/23-05:42:50
G05     48.4           17.2                1.4 +/-    0.69       3.2 +/-    0.69  0.140 / 0.470
G10     234.8          10.4              -14.2 +/-   25.54     -39.3 +/-   25.54  0.120 / 0.450
G13     79.2           36.7                4.4 +/-    0.61       6.8 +/-    0.61  0.060 / 0.130
G15     126.5          50.9                5.9 +/-    0.60       7.4 +/-    0.60  0.070 / 0.160
G16     315.8          11.8                3.2 +/-    2.18       8.6 +/-    2.18  0.110 / 0.370
G20     268.0          68.6                5.5 +/-    0.77       5.8 +/-    0.77  0.090 / 0.410
G21     311.0          45.6                4.2 +/-    1.50       5.6 +/-    1.50  0.040 / 0.050
G25     201.3          13.0                4.6 +/-    1.61      11.9 +/-    1.61  0.040 / 0.050
G26     288.6          20.9                4.2 +/-    2.29       9.0 +/-    2.29  0.290 / 0.320
G29     153.8          75.2                6.0 +/-    0.58       6.2 +/-    0.58  0.030 / 0.040