PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-19:42:50
G01     111.2          23.3               13.8 +/-    2.12      28.1 +/-    2.12  0.100 / 0.180
G07     99.3           61.8               13.0 +/-    0.78      14.5 +/-    0.78  0.110 / 0.130
G08     43.1           27.1                8.6 +/-    1.83      16.0 +/-    1.83  0.120 / 0.110
G09     176.0          17.9               14.5 +/-    1.45      33.6 +/-    1.45  0.060 / 0.090
G11     96.9           42.7               13.4 +/-    1.10      18.7 +/-    1.10  0.090 / 0.180
G13     312.9          25.6               11.6 +/-    1.68      22.4 +/-    1.68  0.090 / 0.150
G17     205.5          29.5               15.1 +/-    1.15      26.7 +/-    1.15  0.030 / 0.030
G18     85.5           23.6               11.1 +/-    1.38      22.3 +/-    1.38  0.030 / 0.040
G28     310.2          60.2               11.6 +/-    1.16      13.2 +/-    1.16  0.020 / 0.020
G30     14.0           76.1               12.4 +/-    0.79      12.8 +/-    0.79  0.020 / 0.030