PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/19-13:58:10
G10     248.3          25.4                2.2 +/-    2.43       4.4 +/-    2.43  0.040 / 0.040
G13     55.9           30.9                4.4 +/-    0.84       7.6 +/-    0.84  0.040 / 0.050
G15     93.8           58.3                4.9 +/-    0.75       5.7 +/-    0.75  0.050 / 0.140
G16     300.1          14.9                0.2 +/-    4.30       0.4 +/-    4.30  0.050 / 0.120
G20     266.5          49.2                4.5 +/-    0.77       5.7 +/-    0.77  0.070 / 0.130
G21     335.8          60.8                3.1 +/-    0.58       3.5 +/-    0.58  0.080 / 0.130
G26     273.4          16.2                3.9 +/-    2.10       9.4 +/-    2.10  0.030 / 0.040
G29     162.3          51.2                1.6 +/-    1.43       2.0 +/-    1.43  0.030 / 0.040