PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-19:28:00
G02     16.0           67.5               10.8 +/-    0.52      11.6 +/-    0.52  0.030 / 0.040
G05     160.1          48.0               14.3 +/-    0.93      18.4 +/-    0.93  0.040 / 0.040
G06     48.1           25.3                8.9 +/-    2.70      17.3 +/-    2.70  0.250 / 0.200
G12     230.0          78.5               11.4 +/-    1.03      11.7 +/-    1.03  0.260 / 0.340
G19     91.3           15.3               10.9 +/-    2.08      26.9 +/-    2.08  0.020 / 0.020
G20     197.1          15.7               17.1 +/-    2.79      41.8 +/-    2.79  0.030 / 0.030
G24     217.6          11.5               13.9 +/-    2.80      37.6 +/-    2.80  0.060 / 0.060
G25     307.7          48.8               11.6 +/-    0.73      14.9 +/-    0.73  0.060 / 0.060
G29     299.8          21.4               12.1 +/-    1.93      25.6 +/-    1.93  0.030 / 0.050