PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-06:57:50
G10     305.6          54.2                4.3 +/-    1.28       5.2 +/-    1.28  0.090 / 0.580
G14     212.6          12.7                5.5 +/-    4.52      14.5 +/-    4.52  0.090 / 0.620
G15     45.6           23.2                1.9 +/-    0.65       4.0 +/-    0.65  0.050 / 0.070
G20     48.7           51.9                3.8 +/-    1.29       4.7 +/-    1.29  0.060 / 0.090
G21     111.2          70.6                6.6 +/-    0.40       6.9 +/-    0.40  0.090 / 0.160
G24     91.2           28.3                5.1 +/-    0.96       9.2 +/-    0.96  0.070 / 0.140
G27     293.6          36.4                4.4 +/-    1.53       6.9 +/-    1.53  0.050 / 0.050
G32     212.9          39.2                6.6 +/-    0.76       9.8 +/-    0.76  0.040 / 0.040