PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/25-14:28:00
G01     49.3           24.6                7.7 +/-    0.59      15.3 +/-    0.59  0.040 / 0.060
G06     177.8          25.9               11.0 +/-    0.80      21.1 +/-    0.80  0.040 / 0.060
G11     43.9           12.0                6.9 +/-    1.40      18.5 +/-    1.40  0.090 / 0.200
G13     251.8          29.8               10.4 +/-    1.18      18.2 +/-    1.18  0.060 / 0.210
G15     285.0          15.3                7.3 +/-    2.06      18.1 +/-    2.06  0.030 / 0.030
G17     333.3          78.0               10.9 +/-    0.74      11.1 +/-    0.74  0.020 / 0.030
G19     250.2          62.9                9.0 +/-    0.63      10.0 +/-    0.63  0.060 / 0.130
G28     54.4           52.3                8.8 +/-    0.79      10.8 +/-    0.79  0.050 / 0.130
G30     150.2          42.3               10.5 +/-    0.80      14.7 +/-    0.80  0.040 / 0.060