PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/21-23:57:40
G08     293.6          23.4               11.5 +/-    1.61      23.4 +/-    1.61  0.030 / 0.030
G10     1.5            62.9               11.3 +/-    0.96      12.6 +/-    0.96  0.030 / 0.030
G14     228.8          46.5               15.1 +/-    2.57      19.9 +/-    2.57  0.070 / 0.090
G18     61.0           52.2               12.4 +/-    0.84      15.2 +/-    0.84  0.100 / 0.130
G21     144.9          40.5               14.3 +/-    0.70      20.6 +/-    0.70  0.030 / 0.030
G24     59.0           27.4               10.5 +/-    1.56      19.5 +/-    1.56  0.040 / 0.030
G27     254.4          32.3               13.4 +/-    2.30      22.5 +/-    2.30  0.100 / 0.110
G32     241.2          63.2               13.2 +/-    1.08      14.6 +/-    1.08  0.080 / 0.080