PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-07:43:00
G10     269.1          39.1                5.5 +/-    2.01       8.1 +/-    2.01  0.180 / 0.250
G13     41.2           17.2                4.3 +/-    1.17      10.2 +/-    1.17  0.130 / 0.200
G15     56.6           46.5                4.0 +/-    0.92       5.2 +/-    0.92  0.200 / 0.080
G16     277.0          11.3                4.6 +/-    1.65      12.5 +/-    1.65  0.250 / 0.100
G20     31.8           58.4                5.1 +/-    0.94       5.9 +/-    0.94  0.050 / 0.040
G21     8.7            73.2                5.3 +/-    0.61       5.5 +/-    0.61  0.050 / 0.060
G24     118.9          15.3                5.6 +/-    1.26      13.9 +/-    1.26  0.050 / 0.040
G27     317.4          20.9                3.7 +/-    3.08       8.0 +/-    3.08  0.050 / 0.040
G29     168.2          29.1                5.8 +/-    0.93      10.3 +/-    0.93  0.140 / 0.090
G32     204.3          12.2                2.7 +/-   13.89       7.1 +/-   13.89  0.120 / 0.130