PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-06:42:40
G10     260.2          33.7                5.9 +/-    1.11       9.6 +/-    1.11  0.040 / 0.040
G13     45.7           23.5                4.8 +/-    2.79       9.7 +/-    2.79  0.030 / 0.040
G15     66.9           52.7                5.6 +/-    0.79       6.8 +/-    0.79  0.120 / 0.450
G16     284.9          13.9                4.0 +/-    1.10      10.2 +/-    1.10  0.160 / 0.460
G20     5.5            67.6                5.1 +/-    0.71       5.5 +/-    0.71  0.110 / 0.200
G21     349.1          67.6                6.0 +/-    0.62       6.4 +/-    0.62  0.180 / 0.270
G24     125.7          10.3               -6.1 +/-   28.44     -16.9 +/-   28.44  0.170 / 0.420
G26     257.1          10.9                5.7 +/-    2.00      15.6 +/-    2.00  0.210 / 0.290
G27     320.9          14.1                1.7 +/-    1.27       4.4 +/-    1.27  0.040 / 0.030
G29     167.2          38.4                7.2 +/-    1.15      10.8 +/-    1.15  0.030 / 0.070