PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/15-15:57:30
G02     38.5           51.1                8.6 +/-    0.45      10.7 +/-    0.45  0.030 / 0.040
G05     135.6          65.6               11.0 +/-    0.96      11.9 +/-    0.96  0.030 / 0.050
G06     56.5           13.7                6.7 +/-    1.86      17.2 +/-    1.86  0.050 / 0.170
G12     195.8          62.2               12.0 +/-    0.69      13.3 +/-    0.69  0.050 / 0.170
G20     199.4          31.6               12.7 +/-    1.15      21.5 +/-    1.15  0.040 / 0.050
G25     284.9          57.9               11.0 +/-    1.23      12.8 +/-    1.23  0.030 / 0.040
G29     314.0          36.9                9.2 +/-    1.61      14.2 +/-    1.61  0.030 / 0.050