PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/13-08:28:10
G10     253.8          30.2                6.1 +/-    1.49      10.7 +/-    1.49  0.040 / 0.040
G13     50.2           27.1                3.3 +/-    2.89       6.1 +/-    2.89  0.040 / 0.040
G15     77.7           55.9                5.9 +/-    0.76       6.9 +/-    0.76  0.140 / 0.140
G16     297.8          13.5                2.5 +/-    1.34       6.4 +/-    1.34  0.150 / 0.170
G20     275.4          53.4                6.5 +/-    4.05       7.9 +/-    4.05  0.090 / 0.090
G21     345.5          65.0                6.4 +/-    0.70       7.0 +/-    0.70  0.100 / 0.110
G29     162.2          40.6                7.5 +/-    1.65      10.8 +/-    1.65  0.130 / 0.510