PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-23:42:50
G02     209.9          53.0               13.5 +/-    1.51      16.4 +/-    1.51  0.080 / 0.110
G06     90.8           79.2                9.8 +/-    0.92      10.0 +/-    0.92  0.070 / 0.120
G12     315.7          28.9                8.7 +/-    1.79      15.7 +/-    1.79  0.090 / 0.210
G17     47.8           41.0                8.6 +/-    0.88      12.3 +/-    0.88  0.090 / 0.230
G19     27.8           55.3                8.8 +/-    0.98      10.4 +/-    0.98  0.060 / 0.080
G24     276.7          42.4               10.7 +/-    1.46      15.0 +/-    1.46  0.070 / 0.080
G28     117.1          19.3               12.8 +/-    1.91      28.7 +/-    1.91  0.060 / 0.070