PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-19:27:50
G01     127.9          11.1               14.8 +/-    6.63      40.4 +/-    6.63  0.140 / 0.310
G07     48.0           69.8               12.8 +/-    0.55      13.6 +/-    0.55  0.130 / 0.240
G08     53.6           43.9               11.8 +/-    0.59      16.1 +/-    0.59  0.040 / 0.040
G09     178.9          37.8               13.6 +/-    0.58      20.6 +/-    0.58  0.040 / 0.050
G11     121.4          34.3               14.5 +/-    0.99      23.3 +/-    0.99  0.030 / 0.040
G13     321.5          10.4               -6.7 +/-    8.48     -18.6 +/-    8.48  0.030 / 0.030
G18     105.3          16.1               12.9 +/-    2.52      31.2 +/-    2.52  0.260 / 0.430
G28     275.2          52.7               13.1 +/-    3.80      16.1 +/-    3.80  0.390 / 0.280
G30     334.4          61.1               11.3 +/-    0.48      12.7 +/-    0.48  0.090 / 0.080