PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-07:57:50
G10     304.5          53.9                5.7 +/-    0.69       6.8 +/-    0.69  0.050 / 0.060
G14     212.3          12.7                3.7 +/-    1.93       9.6 +/-    1.93  0.050 / 0.070
G15     45.6           23.4                2.3 +/-    2.00       4.7 +/-    2.00  0.190 / 0.430
G20     56.4           45.2                6.1 +/-    1.15       8.2 +/-    1.15  0.110 / 0.380
G21     110.1          70.8                7.7 +/-    1.06       8.1 +/-    1.06  0.050 / 0.030
G24     92.1           28.2                6.8 +/-    1.31      12.5 +/-    1.31  0.060 / 0.030
G27     294.2          36.3                6.9 +/-    2.43      10.7 +/-    2.43  0.030 / 0.040
G32     212.7          38.5                5.7 +/-    1.47       8.5 +/-    1.47  0.030 / 0.040