PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-07:28:00
G08     311.5          17.2                2.5 +/-    1.76       5.8 +/-    1.76  0.110 / 0.240
G10     332.5          60.1                2.0 +/-    0.49       2.3 +/-    0.49  0.110 / 0.180
G14     218.8          26.8                5.7 +/-    3.02      10.6 +/-    3.02  0.070 / 0.080
G20     66.1           42.8                5.0 +/-    0.38       6.9 +/-    0.38  0.060 / 0.080
G21     134.7          57.0                5.7 +/-    0.60       6.7 +/-    0.60  0.030 / 0.040
G24     73.2           29.9                4.6 +/-    0.62       8.1 +/-    0.62  0.030 / 0.030
G27     273.7          37.4                5.5 +/-    0.95       8.4 +/-    0.95  0.050 / 0.100
G32     223.8          54.6                6.6 +/-    1.76       7.9 +/-    1.76  0.050 / 0.100