PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-06:27:30
G10     257.3          31.6                8.4 +/-    2.42      14.2 +/-    2.42  0.110 / 0.310
G13     47.7           25.6                5.4 +/-    0.78      10.4 +/-    0.78  0.100 / 0.300
G15     71.7           54.4                5.2 +/-    0.33       6.2 +/-    0.33  0.110 / 0.110
G16     287.9          14.6                4.8 +/-    2.27      12.1 +/-    2.27  0.080 / 0.100
G20     354.6          69.6                5.2 +/-    0.91       5.6 +/-    0.91  0.180 / 0.330
G21     344.0          65.4                3.0 +/-    0.82       3.2 +/-    0.82  0.120 / 0.280
G26     259.8          12.4                6.5 +/-    5.34      17.1 +/-    5.34  0.040 / 0.060
G27     321.8          11.6               -1.3 +/-   26.69      -3.5 +/-   26.69  0.040 / 0.060
G29     166.7          41.8                6.9 +/-    0.95       9.8 +/-    0.95  0.050 / 0.070