PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-16:58:00
G02     34.1           55.0               22.2 +/-    0.48      26.5 +/-    0.48  0.040 / 0.040
G05     145.5          61.7               26.5 +/-    0.59      29.6 +/-    0.59  0.040 / 0.060
G06     54.3           16.1               16.7 +/-    2.09      40.5 +/-    2.09  0.040 / 0.040
G12     199.3          66.7               21.7 +/-    0.88      23.4 +/-    0.88  0.030 / 0.040
G20     198.5          27.7               30.9 +/-    1.02      56.9 +/-    1.02  0.100 / 0.180
G25     291.8          56.4               23.2 +/-    0.88      27.2 +/-    0.88  0.130 / 0.170
G29     310.5          32.8               22.0 +/-    1.17      36.4 +/-    1.17  0.050 / 0.040