PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/11-22:27:30
G02     57.5           34.8                9.1 +/-    2.05      14.6 +/-    2.05  0.030 / 0.040
G05     60.5           62.3                9.8 +/-    0.41      10.9 +/-    0.41  0.030 / 0.040
G12     183.0          32.3               13.4 +/-    1.54      22.3 +/-    1.54  0.100 / 0.390
G13     129.4          14.0               13.7 +/-    3.06      35.0 +/-    3.06  0.140 / 0.340
G21     269.6          15.4               12.9 +/-    1.69      31.7 +/-    1.69  0.070 / 0.070
G25     239.1          53.1               13.0 +/-    4.61      15.8 +/-    4.61  0.090 / 0.080
G29     326.3          51.7               11.5 +/-    1.35      14.2 +/-    1.35  0.180 / 0.320