PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-19:42:50
G02     32.7           56.1               11.7 +/-    0.93      13.8 +/-    0.93  0.040 / 0.040
G05     146.5          61.9               14.2 +/-    0.41      15.9 +/-    0.41  0.030 / 0.040
G06     55.1           14.5                8.4 +/-    3.79      21.2 +/-    3.79  0.040 / 0.050
G12     196.4          65.2               11.5 +/-    0.49      12.5 +/-    0.49  0.040 / 0.050
G20     198.1          29.2               14.0 +/-    1.80      24.9 +/-    1.80  0.020 / 0.030
G25     288.3          58.1                9.9 +/-    2.82      11.5 +/-    2.82  0.030 / 0.040
G29     309.9          31.6               10.6 +/-    1.01      18.0 +/-    1.01  0.110 / 0.110