PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-16:57:40
G02     204.5          34.6               14.6 +/-    1.36      23.3 +/-    1.36  0.160 / 0.080
G06     150.3          72.1               13.3 +/-    0.77      13.9 +/-    0.77  0.140 / 0.110
G12     309.7          20.1               11.5 +/-    3.23      25.3 +/-    3.23  0.160 / 0.270
G17     38.1           47.5               11.3 +/-    1.70      14.8 +/-    1.70  0.160 / 0.240
G19     357.6          65.5               11.3 +/-    0.33      12.3 +/-    0.33  0.040 / 0.020
G24     294.5          39.9               14.4 +/-    8.46      21.0 +/-    8.46  0.050 / 0.020
G28     104.1          30.1               10.9 +/-    0.99      19.0 +/-    0.99  0.050 / 0.030