PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-20:42:40
G10     247.5          23.1               19.5 +/-    2.27      39.8 +/-    2.27  0.120 / 0.370
G13     58.5           33.3               13.9 +/-    0.78      22.7 +/-    0.78  0.130 / 0.440
G15     94.4           57.7               17.4 +/-    0.68      20.1 +/-    0.68  0.040 / 0.050
G16     303.1          13.7               13.9 +/-    1.95      35.7 +/-    1.95  0.050 / 0.050
G18     263.9          53.8               17.5 +/-    0.84      21.1 +/-    0.84  0.050 / 0.060
G20     40.1           51.7               14.1 +/-    0.89      17.4 +/-    0.89  0.050 / 0.050
G21     331.0          58.8               15.1 +/-    0.36      17.3 +/-    0.36  0.120 / 0.330
G26     275.5          16.5               16.6 +/-    1.70      39.9 +/-    1.70  0.130 / 0.500
G29     161.6          49.5               18.7 +/-    1.12      23.7 +/-    1.12  0.050 / 0.140