PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-20:57:50
G10     248.4          24.0               18.7 +/-    1.21      37.3 +/-    1.21  0.040 / 0.050
G13     57.2           32.7               14.5 +/-    0.41      24.0 +/-    0.41  0.040 / 0.050
G15     92.0           57.7               17.3 +/-    0.73      20.0 +/-    0.73  0.150 / 0.510
G16     301.8          13.9               12.9 +/-    1.75      32.9 +/-    1.75  0.120 / 0.400
G18     265.6          54.6               19.2 +/-    0.89      23.0 +/-    0.89  0.120 / 0.270
G20     41.0           50.6               14.0 +/-    0.37      17.5 +/-    0.37  0.140 / 0.340
G21     332.3          59.6               16.7 +/-    0.87      19.0 +/-    0.87  0.050 / 0.130
G26     274.2          16.1               15.3 +/-    1.71      37.1 +/-    1.71  0.050 / 0.140
G29     162.1          48.3               19.5 +/-    1.10      25.1 +/-    1.10  0.050 / 0.060