PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/11-23:57:30
G07     43.1           69.7                8.7 +/-    0.63       9.2 +/-    0.63  0.300 / 0.430
G08     54.0           43.5                7.3 +/-    0.64      10.1 +/-    0.64  0.270 / 0.260
G09     179.4          40.1               10.2 +/-    1.56      14.8 +/-    1.56  0.040 / 0.080
G11     124.2          32.9               10.0 +/-    1.11      16.6 +/-    1.11  0.050 / 0.070
G17     200.2          11.1                0.5 +/-   25.98       1.5 +/-   25.98  0.050 / 0.050
G28     272.8          51.9                9.2 +/-    1.07      11.4 +/-    1.07  0.050 / 0.040
G30     336.1          61.7                7.2 +/-    0.53       8.1 +/-    0.53  0.030 / 0.050