PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-18:42:50
G05     48.2           18.8                8.5 +/-    0.53      19.2 +/-    0.53  0.090 / 0.400
G10     235.8          13.9               13.3 +/-    2.54      33.9 +/-    2.54  0.170 / 0.400
G13     74.9           35.2               10.3 +/-    0.94      16.3 +/-    0.94  0.050 / 0.080
G15     125.2          52.3               12.6 +/-    0.58      15.5 +/-    0.58  0.040 / 0.090
G16     313.8          12.7                7.6 +/-    1.45      20.0 +/-    1.45  0.060 / 0.140
G20     248.6          37.9               13.6 +/-    1.21      20.5 +/-    1.21  0.050 / 0.160
G21     312.9          46.1                8.4 +/-    1.42      11.1 +/-    1.42  0.140 / 0.460
G25     200.1          12.0               13.8 +/-    2.20      36.8 +/-    2.20  0.130 / 0.330
G26     287.7          20.2                9.4 +/-    1.66      20.5 +/-    1.66  0.030 / 0.060
G29     152.8          73.4               13.3 +/-    0.98      13.8 +/-    0.98  0.040 / 0.050