PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-06:12:30
G10     248.2          24.4                7.1 +/-    1.30      14.2 +/-    1.30  0.070 / 0.030
G13     56.6           31.8                5.8 +/-    1.56       9.9 +/-    1.56  0.060 / 0.030
G15     91.3           57.5                6.8 +/-    0.70       7.9 +/-    0.70  0.090 / 0.270
G16     298.2          15.5                3.5 +/-    2.12       8.7 +/-    2.12  0.090 / 0.260
G20     325.8          72.7                6.7 +/-    0.46       7.0 +/-    0.46  0.030 / 0.040
G21     330.2          58.2                5.4 +/-    0.96       6.2 +/-    0.96  0.030 / 0.040
G26     269.4          16.8                6.1 +/-    1.18      14.4 +/-    1.18  0.030 / 0.030
G29     164.1          53.4                7.3 +/-    0.40       8.8 +/-    0.40  0.030 / 0.040