PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/08-20:13:10
G01     127.5          11.4               15.2 +/-    4.94      41.1 +/-    4.94  0.050 / 0.040
G07     49.4           69.8               11.6 +/-    0.43      12.3 +/-    0.43  0.050 / 0.040
G08     53.6           44.2               10.0 +/-    0.81      13.6 +/-    0.81  0.030 / 0.040
G09     178.9          37.4               13.5 +/-    0.93      20.5 +/-    0.93  0.030 / 0.030
G11     121.3          34.5               15.2 +/-    2.18      24.4 +/-    2.18  0.230 / 0.430
G13     321.4          10.7               -6.6 +/-   12.00     -18.2 +/-   12.00  0.380 / 0.310
G17     201.3          10.7               -7.0 +/-   14.89     -19.2 +/-   14.89  0.030 / 0.040
G18     104.9          16.3               13.7 +/-    1.51      33.1 +/-    1.51  0.030 / 0.030
G28     276.0          52.9               11.7 +/-    3.70      14.2 +/-    3.70  0.140 / 0.270
G30     335.6          61.8               11.1 +/-    0.54      12.4 +/-    0.54  0.130 / 0.250