PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/18-04:27:40
G02     38.3           50.5                2.9 +/-    1.33       3.6 +/-    1.33  0.030 / 0.030
G05     126.5          66.0                4.3 +/-    0.47       4.7 +/-    0.47  0.030 / 0.040
G06     54.8           16.3                1.3 +/-    1.58       3.2 +/-    1.58  0.030 / 0.030
G12     198.3          64.6                4.5 +/-    0.74       5.0 +/-    0.74  0.030 / 0.030
G25     286.2          57.6                5.5 +/-    2.14       6.3 +/-    2.14  0.040 / 0.040
G29     313.8          36.7                2.4 +/-    0.95       3.7 +/-    0.95  0.030 / 0.040