PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-21:58:10
G01     120.6          16.8               19.6 +/-    2.53      46.6 +/-    2.53  0.140 / 0.240
G07     75.0           67.6               16.7 +/-    0.36      17.9 +/-    0.36  0.180 / 0.210
G08     47.0           36.5               14.3 +/-    1.35      22.0 +/-    1.35  0.040 / 0.060
G09     178.0          28.7               20.1 +/-    0.80      36.3 +/-    0.80  0.050 / 0.090
G11     112.5          39.0               19.0 +/-    0.76      28.1 +/-    0.76  0.070 / 0.050
G13     318.7          17.5               15.2 +/-    2.30      35.5 +/-    2.30  0.080 / 0.060
G17     202.3          20.1               25.9 +/-    3.47      56.8 +/-    3.47  0.180 / 0.190
G28     290.5          57.0               15.8 +/-    1.45      18.5 +/-    1.45  0.250 / 0.250
G30     350.7          69.3               16.1 +/-    0.61      17.1 +/-    0.61  0.070 / 0.080