PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-21:42:00
G02     43.6           46.6                9.6 +/-    0.93      12.6 +/-    0.93  0.030 / 0.030
G05     104.8          69.3               11.3 +/-    1.04      12.0 +/-    1.04  0.030 / 0.040
G12     186.2          50.7               13.9 +/-    0.56      17.4 +/-    0.56  0.030 / 0.040
G25     272.1          58.5                7.2 +/-    1.65       8.3 +/-    1.65  0.040 / 0.050
G29     315.6          37.0               10.5 +/-    1.20      16.1 +/-    1.20  0.040 / 0.050