PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-09:27:50
G02     228.2          72.3                7.0 +/-    0.94       7.3 +/-    0.94  0.130 / 0.290
G05     174.4          10.9               -2.1 +/-   20.23      -5.8 +/-   20.23  0.120 / 0.270
G06     43.6           70.7                7.1 +/-    0.31       7.5 +/-    0.31  0.050 / 0.100
G12     320.7          44.3                5.8 +/-    1.07       7.9 +/-    1.07  0.050 / 0.090
G17     66.8           25.2                4.8 +/-    0.75       9.4 +/-    0.75  0.070 / 0.120
G19     52.3           41.4                4.9 +/-    1.22       6.9 +/-    1.22  0.050 / 0.120
G24     253.7          38.0                7.1 +/-    0.86      10.6 +/-    0.86  0.030 / 0.060