PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/26-21:57:40
G02     213.0          56.7               14.8 +/-    0.77      17.3 +/-    0.77  0.070 / 0.090
G06     67.7           76.5               12.3 +/-    0.53      12.6 +/-    0.53  0.070 / 0.100
G12     317.6          33.6               10.0 +/-    1.87      16.3 +/-    1.87  0.060 / 0.060
G17     52.6           36.9               10.5 +/-    1.63      16.2 +/-    1.63  0.050 / 0.050
G19     32.7           52.9               12.4 +/-    1.06      15.1 +/-    1.06  0.030 / 0.030
G24     270.0          42.3               14.4 +/-    3.24      20.2 +/-    3.24  0.030 / 0.020
G28     120.2          16.3               14.3 +/-    2.38      34.6 +/-    2.38  0.050 / 0.050