PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-23:27:50
G02     202.4          34.6               17.9 +/-    1.73      28.7 +/-    1.73  0.100 / 0.240
G06     160.8          68.0               15.7 +/-    0.83      16.7 +/-    0.83  0.090 / 0.250
G12     306.9          14.2                9.7 +/-    2.34      24.6 +/-    2.34  0.060 / 0.150
G17     30.1           53.7               13.0 +/-    0.46      15.7 +/-    0.46  0.070 / 0.130
G19     356.3          66.3               12.0 +/-    0.62      13.0 +/-    0.62  0.060 / 0.080
G24     299.4          37.4               13.4 +/-    1.40      20.4 +/-    1.40  0.060 / 0.100
G28     101.6          31.6               15.3 +/-    0.61      25.9 +/-    0.61  0.090 / 0.100