PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-08:43:10
G10     308.1          54.9                3.3 +/-    1.00       3.9 +/-    1.00  0.160 / 0.410
G14     213.0          15.1                3.9 +/-    3.17       9.6 +/-    3.17  0.250 / 0.520
G15     45.5           21.2                3.0 +/-    2.57       6.4 +/-    2.57  0.080 / 0.040
G20     63.0           38.7                4.4 +/-    1.20       6.5 +/-    1.20  0.070 / 0.030
G21     115.3          68.8                4.4 +/-    0.70       4.7 +/-    0.70  0.050 / 0.080
G24     89.7           28.8                4.6 +/-    1.81       8.3 +/-    1.81  0.060 / 0.070
G27     291.4          37.0                8.7 +/-    1.72      13.3 +/-    1.72  0.080 / 0.050
G32     213.9          40.7                6.1 +/-    1.05       8.8 +/-    1.05  0.080 / 0.040