PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-06:12:30
G05     46.9           21.3                2.7 +/-    2.40       5.7 +/-    2.40  0.200 / 0.300
G13     85.7           36.4                6.9 +/-    0.75      10.7 +/-    0.75  0.290 / 0.300
G15     132.7          47.4                7.0 +/-    0.64       9.1 +/-    0.64  0.040 / 0.040
G20     264.6          70.8                5.3 +/-    1.04       5.6 +/-    1.04  0.040 / 0.040
G21     306.6          42.7                4.5 +/-    1.11       6.2 +/-    1.11  0.060 / 0.080
G25     203.9          17.0                5.8 +/-    4.40      13.6 +/-    4.40  0.050 / 0.080
G26     293.8          20.9                4.5 +/-    1.48       9.8 +/-    1.48  0.170 / 0.390
G29     146.2          80.6                5.1 +/-    0.64       5.1 +/-    0.64  0.190 / 0.260