PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-19:27:50
G02     272.5          79.8                9.8 +/-    0.78      10.0 +/-    0.78  0.080 / 0.170
G05     168.5          23.7               13.4 +/-    1.89      26.9 +/-    1.89  0.130 / 0.180
G06     40.3           48.3                8.9 +/-    0.51      11.5 +/-    0.51  0.030 / 0.040
G12     320.8          64.1                7.4 +/-    0.98       8.1 +/-    0.98  0.030 / 0.030
G17     77.8           17.5               10.1 +/-    1.11      23.7 +/-    1.11  0.070 / 0.140
G19     63.4           35.9               10.7 +/-    0.40      16.7 +/-    0.40  0.070 / 0.150
G24     235.7          29.5               11.0 +/-    1.16      19.5 +/-    1.16  0.030 / 0.040
G25     317.6          19.8                8.2 +/-    1.69      18.1 +/-    1.69  0.030 / 0.080