PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/20-00:28:10
G02     212.5          57.6               12.5 +/-    1.12      14.5 +/-    1.12  0.020 / 0.020
G06     70.7           77.4               10.2 +/-    0.45      10.4 +/-    0.45  0.030 / 0.020
G12     317.2          32.3                9.2 +/-    1.70      15.4 +/-    1.70  0.070 / 0.130
G17     50.9           38.9               10.7 +/-    1.74      15.9 +/-    1.74  0.090 / 0.080
G19     33.7           52.4               10.1 +/-    1.46      12.4 +/-    1.46  0.090 / 0.210
G24     271.0          42.2               11.4 +/-    3.42      16.1 +/-    3.42  0.120 / 0.270
G28     120.1          16.2               13.2 +/-    1.77      31.9 +/-    1.77  0.070 / 0.070