PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/16-13:12:30
G10     248.5          27.0                4.4 +/-    1.39       8.3 +/-    1.39  0.140 / 0.370
G13     55.1           29.8                4.4 +/-    1.95       7.8 +/-    1.95  0.160 / 0.430
G15     84.9           55.9                4.7 +/-    0.67       5.6 +/-    0.67  0.080 / 0.120
G16     297.5          16.0                4.5 +/-    1.81      11.0 +/-    1.81  0.110 / 0.140
G20     269.8          52.4                5.7 +/-    2.35       6.9 +/-    2.35  0.040 / 0.030
G21     333.2          59.1                2.7 +/-    0.86       3.1 +/-    0.86  0.040 / 0.040
G26     271.3          16.2                5.3 +/-    2.47      12.8 +/-    2.47  0.030 / 0.040
G29     162.9          54.1                6.3 +/-    0.59       7.6 +/-    0.59  0.040 / 0.040