PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-07:13:00
G10     307.5          54.8                3.8 +/-    1.15       4.5 +/-    1.15  0.150 / 0.520
G14     212.9          14.0                5.3 +/-    2.72      13.5 +/-    2.72  0.160 / 0.500
G15     45.5           22.0                1.9 +/-    0.80       4.1 +/-    0.80  0.050 / 0.080
G20     52.1           49.7                3.9 +/-    0.33       4.9 +/-    0.33  0.050 / 0.080
G21     114.0          69.6                4.6 +/-    0.36       4.9 +/-    0.36  0.060 / 0.110
G24     89.8           28.6                5.2 +/-    0.67       9.3 +/-    0.67  0.070 / 0.110
G27     292.1          36.8                5.0 +/-    1.71       7.6 +/-    1.71  0.030 / 0.050
G32     213.6          40.5                7.2 +/-    0.51      10.4 +/-    0.51  0.030 / 0.050