PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-20:58:00
G10     248.4          24.0               19.9 +/-    1.07      39.7 +/-    1.07  0.060 / 0.140
G13     57.2           32.7               13.8 +/-    1.17      22.8 +/-    1.17  0.080 / 0.120
G15     92.0           57.7               17.1 +/-    1.04      19.8 +/-    1.04  0.040 / 0.040
G16     301.8          13.9               12.0 +/-    2.59      30.8 +/-    2.59  0.050 / 0.040
G18     265.6          54.6               16.8 +/-    2.41      20.1 +/-    2.41  0.160 / 0.330
G20     41.0           50.6               14.8 +/-    0.89      18.5 +/-    0.89  0.170 / 0.360
G21     332.3          59.6               14.3 +/-    0.57      16.3 +/-    0.57  0.050 / 0.120
G26     274.2          16.1               16.0 +/-    3.98      38.6 +/-    3.98  0.060 / 0.100
G29     162.1          48.3               18.4 +/-    0.84      23.7 +/-    0.84  0.060 / 0.050