PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-00:57:30
G10     251.0          26.1               14.3 +/-    2.56      27.3 +/-    2.56  0.050 / 0.050
G13     54.1           31.0               10.6 +/-    0.69      18.2 +/-    0.69  0.060 / 0.060
G15     89.9           58.6               12.6 +/-    0.62      14.5 +/-    0.62  0.120 / 0.380
G16     296.7          14.6               10.4 +/-    4.07      26.2 +/-    4.07  0.120 / 0.410
G18     268.5          55.0               13.1 +/-    1.61      15.6 +/-    1.61  0.090 / 0.160
G20     44.0           46.7               10.4 +/-    1.72      13.7 +/-    1.72  0.190 / 0.150
G21     333.7          60.5               13.1 +/-    1.57      14.8 +/-    1.57  0.040 / 0.070
G26     268.9          15.3               13.5 +/-    1.61      33.4 +/-    1.61  0.040 / 0.050
G29     164.4          47.3               12.3 +/-    1.06      16.0 +/-    1.06  0.040 / 0.080