PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-14:57:50
G08     303.9          20.5                5.1 +/-    1.31      11.1 +/-    1.31  0.060 / 0.080
G10     346.4          61.8                3.6 +/-    0.61       4.0 +/-    0.61  0.060 / 0.070
G14     223.0          37.1                7.2 +/-    1.14      11.0 +/-    1.14  0.030 / 0.030
G21     140.4          46.2                7.9 +/-    0.87      10.5 +/-    0.87  0.020 / 0.030
G24     66.1           29.3                5.5 +/-    0.54       9.8 +/-    0.54  0.040 / 0.060
G27     263.6          35.5                5.7 +/-    0.82       9.0 +/-    0.82  0.050 / 0.070
G32     231.7          60.0                7.7 +/-    0.80       8.7 +/-    0.80  0.040 / 0.080