PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-19:27:50
G02     255.0          77.8               12.9 +/-    0.94      13.1 +/-    0.94  0.070 / 0.190
G05     169.9          20.3               16.3 +/-    0.76      35.6 +/-    0.76  0.050 / 0.190
G06     40.3           52.0               12.5 +/-    0.85      15.4 +/-    0.85  0.040 / 0.050
G12     322.0          60.1               12.8 +/-    0.84      14.5 +/-    0.84  0.030 / 0.040
G17     74.7           19.7               12.3 +/-    1.04      27.3 +/-    1.04  0.030 / 0.040
G19     59.6           38.1               12.1 +/-    0.46      18.2 +/-    0.46  0.040 / 0.040
G24     239.1          31.9               16.5 +/-    1.84      27.8 +/-    1.84  0.070 / 0.130
G25     317.3          16.5               11.8 +/-    2.10      28.2 +/-    2.10  0.080 / 0.140