PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-22:42:50
G02     224.0          68.1               12.9 +/-    1.92      13.7 +/-    1.92  0.070 / 0.100
G06     45.5           66.6               10.0 +/-    0.61      10.7 +/-    0.61  0.080 / 0.080
G12     320.8          43.8               11.2 +/-    1.29      15.3 +/-    1.29  0.040 / 0.060
G17     62.0           30.2                9.1 +/-    1.06      15.8 +/-    1.06  0.050 / 0.070
G19     46.3           45.6                9.9 +/-    0.53      13.2 +/-    0.53  0.050 / 0.050
G24     255.2          39.2               15.3 +/-    1.33      22.5 +/-    1.33  0.050 / 0.050