PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-06:42:40
G10     248.6          24.8                5.1 +/-    2.08      10.1 +/-    2.08  0.130 / 0.620
G13     56.0           31.5                4.8 +/-    0.69       8.1 +/-    0.69  0.170 / 0.560
G15     89.8           57.3                5.6 +/-    0.66       6.5 +/-    0.66  0.060 / 0.150
G16     297.7          15.5                3.4 +/-    3.30       8.3 +/-    3.30  0.130 / 0.130
G20     342.8          72.6                4.6 +/-    0.53       4.8 +/-    0.53  0.040 / 0.040
G21     331.1          58.7                3.0 +/-    0.78       3.5 +/-    0.78  0.030 / 0.040
G26     268.9          16.5                6.2 +/-    2.09      14.9 +/-    2.09  0.030 / 0.070
G29     164.2          52.6                5.7 +/-    0.99       6.9 +/-    0.99  0.040 / 0.060