PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/28-20:58:10
G10     289.0          48.9                9.4 +/-    1.67      12.1 +/-    1.67  0.060 / 0.110
G15     48.6           38.1                7.3 +/-    0.77      11.0 +/-    0.77  0.080 / 0.120
G20     337.6          65.3                7.7 +/-    0.91       8.4 +/-    0.91  0.040 / 0.050
G21     73.7           76.6               10.3 +/-    0.53      10.5 +/-    0.53  0.040 / 0.050
G24     100.9          23.8                8.6 +/-    1.38      17.2 +/-    1.38  0.080 / 0.300
G27     307.5          30.3                8.1 +/-    2.17      14.0 +/-    2.17  0.070 / 0.230
G29     168.5          13.5               11.1 +/-    1.45      28.7 +/-    1.45  0.040 / 0.070
G32     208.1          26.9                9.6 +/-    1.77      18.0 +/-    1.77  0.040 / 0.080