PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/21-15:57:40
G10     250.0          26.7                9.3 +/-    0.81      17.4 +/-    0.81  0.160 / 0.660
G13     54.0           29.9                2.0 +/-    0.50       3.6 +/-    0.50  0.170 / 0.640
G15     91.6           58.7                8.9 +/-    1.12      10.2 +/-    1.12  0.030 / 0.060
G16     297.3          15.2                6.5 +/-    3.27      16.2 +/-    3.27  0.040 / 0.050
G20     269.0          50.4                7.7 +/-    0.43       9.6 +/-    0.43  0.030 / 0.060
G21     336.3          61.2                8.3 +/-    0.43       9.3 +/-    0.43  0.030 / 0.050
G26     270.4          15.6                7.7 +/-    2.61      18.9 +/-    2.61  0.050 / 0.190
G29     163.5          50.0               10.1 +/-    0.67      12.8 +/-    0.67  0.060 / 0.180