PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/07-21:12:50
G01     105.7          26.3               10.9 +/-    1.11      20.6 +/-    1.11  0.080 / 0.160
G07     108.7          57.7               13.3 +/-    0.37      15.4 +/-    0.37  0.140 / 0.210
G08     42.4           23.5                8.9 +/-    1.79      18.0 +/-    1.79  0.060 / 0.120
G09     175.1          13.1               14.0 +/-    1.67      36.5 +/-    1.67  0.060 / 0.130
G11     89.6           43.4               11.9 +/-    1.29      16.4 +/-    1.29  0.020 / 0.030
G13     308.8          29.1               11.4 +/-    0.85      20.4 +/-    0.85  0.020 / 0.030
G17     207.6          35.3               13.6 +/-    1.37      21.5 +/-    1.37  0.090 / 0.160
G18     79.4           24.6               11.8 +/-    1.75      23.3 +/-    1.75  0.080 / 0.120
G28     321.8          61.3               11.7 +/-    0.80      13.2 +/-    0.80  0.030 / 0.030
G30     43.1           78.6               13.8 +/-    0.71      14.1 +/-    0.71  0.020 / 0.040