PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-22:42:50
G02     214.3          58.9               17.6 +/-    0.60      20.2 +/-    0.60  0.040 / 0.120
G06     61.9           75.3               14.3 +/-    0.97      14.8 +/-    0.97  0.040 / 0.110
G12     318.1          34.9               11.1 +/-    1.27      17.7 +/-    1.27  0.040 / 0.050
G17     53.9           36.2               12.3 +/-    0.73      19.0 +/-    0.73  0.030 / 0.050
G19     35.4           51.5               12.7 +/-    0.73      15.7 +/-    0.73  0.040 / 0.050
G24     267.6          42.0               15.4 +/-    1.42      21.8 +/-    1.42  0.050 / 0.060
G28     121.5          14.8               17.0 +/-    2.71      42.6 +/-    2.71  0.120 / 0.250