PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-07:57:40
G08     297.1          21.5                3.5 +/-    1.80       7.4 +/-    1.80  0.050 / 0.110
G10     4.8            63.0                2.7 +/-    0.42       3.0 +/-    0.42  0.070 / 0.110
G14     228.7          40.8                6.7 +/-    1.54       9.6 +/-    1.54  0.080 / 0.110
G20     81.2           33.7                3.7 +/-    0.66       6.1 +/-    0.66  0.070 / 0.110
G21     146.0          41.7                6.6 +/-    0.66       9.3 +/-    0.66  0.060 / 0.110
G24     56.8           25.9                4.2 +/-    0.40       8.0 +/-    0.40  0.060 / 0.120
G27     255.0          32.1                5.8 +/-    1.15       9.8 +/-    1.15  0.030 / 0.040
G32     245.7          68.8                5.5 +/-    0.32       5.9 +/-    0.32  0.030 / 0.030