PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/29-18:27:40
G02     249.4          76.4               12.5 +/-    0.46      12.8 +/-    0.46  0.050 / 0.230
G05     170.6          19.0               15.2 +/-    2.43      34.3 +/-    2.43  0.050 / 0.220
G06     40.4           53.0               11.9 +/-    0.45      14.5 +/-    0.45  0.050 / 0.040
G12     322.4          59.5               11.5 +/-    1.31      13.1 +/-    1.31  0.040 / 0.050
G17     74.0           19.9               11.6 +/-    1.18      25.5 +/-    1.18  0.030 / 0.050
G19     58.1           39.1               11.7 +/-    0.83      17.3 +/-    0.83  0.030 / 0.040
G24     240.1          32.6               13.8 +/-    2.55      22.9 +/-    2.55  0.170 / 0.500
G25     317.2          15.7                9.3 +/-    2.79      22.7 +/-    2.79  0.180 / 0.400