PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/26-19:43:00
G05     45.8           28.4               11.3 +/-    1.04      20.5 +/-    1.04  0.040 / 0.110
G13     89.9           36.6               15.4 +/-    0.74      23.8 +/-    0.74  0.040 / 0.080
G15     136.3          45.3               17.4 +/-    0.86      23.3 +/-    0.86  0.100 / 0.210
G18     237.6          35.0               18.9 +/-    2.43      30.0 +/-    2.43  0.080 / 0.240
G20     16.9           75.5               15.9 +/-    0.74      16.4 +/-    0.74  0.080 / 0.220
G21     305.4          42.5               15.0 +/-    1.65      21.0 +/-    1.65  0.100 / 0.200
G25     202.0          16.7               17.1 +/-    0.93      40.8 +/-    0.93  0.040 / 0.110
G26     300.7          18.4               13.2 +/-    1.06      30.1 +/-    1.06  0.050 / 0.120
G29     140.9          77.7               14.9 +/-    0.67      15.2 +/-    0.67  0.040 / 0.040