PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-00:27:30
G10     250.8          26.9               13.5 +/-    1.14      25.3 +/-    1.14  0.040 / 0.040
G13     53.3           29.7               11.7 +/-    2.04      20.6 +/-    2.04  0.040 / 0.050
G15     90.0           58.7               14.0 +/-    1.13      16.1 +/-    1.13  0.130 / 0.320
G16     294.1          15.9                8.7 +/-    1.10      21.2 +/-    1.10  0.120 / 0.290
G20     260.2          35.1               11.9 +/-    2.76      18.9 +/-    2.76  0.060 / 0.160
G21     332.7          59.7               11.6 +/-    0.50      13.2 +/-    0.50  0.090 / 0.160
G26     266.1          15.6               11.9 +/-    1.99      29.1 +/-    1.99  0.040 / 0.030
G29     165.3          50.8               14.9 +/-    0.56      18.6 +/-    0.56  0.030 / 0.030