PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/20-11:12:30
G02     219.4          63.7                5.6 +/-    1.08       6.2 +/-    1.08  0.040 / 0.060
G06     50.4           70.4                4.7 +/-    0.45       5.0 +/-    0.45  0.040 / 0.050
G12     319.7          41.3                4.0 +/-    0.80       5.7 +/-    0.80  0.030 / 0.030
G17     59.2           30.7                2.4 +/-    2.43       4.2 +/-    2.43  0.030 / 0.030
G19     44.7           45.2                3.0 +/-    1.18       4.0 +/-    1.18  0.060 / 0.140
G24     262.7          40.1                5.7 +/-    3.84       8.2 +/-    3.84  0.110 / 0.110
G28     122.7          18.2                5.1 +/-    1.78      11.8 +/-    1.78  0.090 / 0.230