PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/16-18:28:00
G02     278.9          80.0               12.3 +/-    0.81      12.5 +/-    0.81  0.030 / 0.030
G05     171.3          22.7               12.4 +/-    1.56      25.6 +/-    1.56  0.030 / 0.030
G06     40.4           47.9               10.9 +/-    1.00      14.1 +/-    1.00  0.180 / 0.200
G12     319.1          63.8               10.6 +/-    0.49      11.6 +/-    0.49  0.120 / 0.160
G17     81.3           13.6               11.9 +/-    1.99      30.6 +/-    1.99  0.100 / 0.130
G19     69.3           30.3                9.5 +/-    1.27      16.5 +/-    1.27  0.130 / 0.150
G24     236.7          28.7               12.6 +/-    0.72      22.7 +/-    0.72  0.030 / 0.030
G25     317.7          26.0               11.6 +/-    2.39      22.0 +/-    2.39  0.030 / 0.030