PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-23:28:10
G02     281.8          81.4               12.7 +/-    0.63      12.9 +/-    0.63  0.050 / 0.050
G05     167.7          24.3               20.2 +/-    1.26      40.1 +/-    1.26  0.030 / 0.030
G06     40.1           49.5               12.8 +/-    0.75      16.3 +/-    0.75  0.070 / 0.090
G12     320.4          61.1               13.1 +/-    0.71      14.8 +/-    0.71  0.070 / 0.120
G17     76.4           20.0               13.2 +/-    1.68      29.0 +/-    1.68  0.160 / 0.210
G19     64.2           34.9               12.2 +/-    1.66      19.4 +/-    1.66  0.100 / 0.180
G24     236.9          29.8               17.6 +/-    2.12      31.0 +/-    2.12  0.040 / 0.040
G25     317.7          18.8               10.7 +/-    1.91      24.3 +/-    1.91  0.040 / 0.140