PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-15:58:10
G02     309.5          81.2                8.9 +/-    0.63       9.0 +/-    0.63  0.200 / 0.210
G05     170.0          25.8               11.7 +/-    2.91      22.5 +/-    2.91  0.180 / 0.140
G06     40.4           46.3                7.4 +/-    0.81       9.7 +/-    0.81  0.020 / 0.030
G12     317.2          65.6                8.6 +/-    0.66       9.3 +/-    0.66  0.030 / 0.040
G17     83.5           12.1                9.5 +/-    2.11      25.2 +/-    2.11  0.080 / 0.140
G19     71.8           28.7                8.7 +/-    1.74      15.6 +/-    1.74  0.130 / 0.130
G24     234.1          26.7               11.9 +/-    2.00      22.3 +/-    2.00  0.100 / 0.170
G25     317.7          27.0                8.7 +/-    2.02      16.2 +/-    2.02  0.150 / 0.210