PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-20:12:30
G02     256.1          78.2                9.9 +/-    0.30      10.1 +/-    0.30  0.030 / 0.040
G05     169.7          20.5               14.7 +/-    1.88      32.0 +/-    1.88  0.030 / 0.040
G06     40.3           52.1               11.0 +/-    0.52      13.5 +/-    0.52  0.040 / 0.040
G12     321.8          59.6                9.4 +/-    1.31      10.7 +/-    1.31  0.030 / 0.040
G17     74.5           20.2               10.7 +/-    1.34      23.4 +/-    1.34  0.080 / 0.130
G19     59.8           37.9                9.8 +/-    1.13      14.8 +/-    1.13  0.080 / 0.130
G24     239.3          31.9               11.3 +/-    1.29      19.0 +/-    1.29  0.080 / 0.150
G25     317.3          16.3                7.9 +/-    1.46      18.9 +/-    1.46  0.090 / 0.160