PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-07:12:50
G08     318.0          13.0                3.8 +/-    1.84      10.0 +/-    1.84  0.130 / 0.560
G10     316.8          57.1                5.0 +/-    0.72       5.9 +/-    0.72  0.160 / 0.510
G14     214.9          18.9                8.4 +/-    1.97      19.1 +/-    1.97  0.080 / 0.090
G15     45.7           17.3                2.5 +/-    0.80       5.8 +/-    0.80  0.080 / 0.080
G20     57.0           47.7                4.8 +/-    0.70       6.2 +/-    0.70  0.060 / 0.120
G21     124.1          65.0                6.2 +/-    0.70       6.8 +/-    0.70  0.060 / 0.110
G24     83.4           29.7                5.2 +/-    0.70       9.1 +/-    0.70  0.040 / 0.040
G27     285.1          37.7                6.8 +/-    0.64      10.3 +/-    0.64  0.030 / 0.040
G32     216.9          46.0                8.8 +/-    0.80      11.7 +/-    0.80  0.040 / 0.050