PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-14:58:00
G02     209.0          47.9               13.2 +/-    0.63      17.1 +/-    0.63  0.060 / 0.070
G06     114.5          79.8               11.5 +/-    0.75      11.7 +/-    0.75  0.050 / 0.050
G12     314.7          26.5                8.6 +/-    1.08      16.3 +/-    1.08  0.110 / 0.210
G17     50.6           37.0                8.2 +/-    1.14      12.5 +/-    1.14  0.120 / 0.120
G19     29.1           54.7                9.4 +/-    1.26      11.2 +/-    1.26  0.050 / 0.050
G24     282.5          41.7               14.0 +/-    3.93      19.8 +/-    3.93  0.050 / 0.060
G28     115.4          20.9               11.1 +/-    2.04      24.0 +/-    2.04  0.070 / 0.080