PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-05:13:00
G10     262.1          35.0                8.0 +/-    1.38      12.6 +/-    1.38  0.050 / 0.030
G13     44.5           22.0                3.5 +/-    2.27       7.4 +/-    2.27  0.060 / 0.040
G15     64.9           52.1                5.2 +/-    0.73       6.4 +/-    0.73  0.140 / 0.350
G16     282.7          13.5                5.1 +/-    1.19      13.0 +/-    1.19  0.150 / 0.270
G20     330.9          69.0                4.4 +/-    0.56       4.7 +/-    0.56  0.330 / 0.250
G21     351.6          68.6                5.5 +/-    0.66       5.9 +/-    0.66  0.280 / 0.210
G24     123.9          11.4                5.0 +/-    2.51      13.6 +/-    2.51  0.160 / 0.180
G27     320.4          15.4                4.0 +/-    1.90       9.9 +/-    1.90  0.180 / 0.180
G29     167.7          36.7                6.6 +/-    1.18      10.1 +/-    1.18  0.050 / 0.040