PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/28-17:43:10
G10     253.0          29.0               10.1 +/-    2.17      18.0 +/-    2.17  0.040 / 0.050
G13     51.0           28.0                6.3 +/-    0.66      11.5 +/-    0.66  0.040 / 0.070
G15     86.1           58.8                8.9 +/-    0.57      10.2 +/-    0.57  0.150 / 0.930
G16     293.2          15.3                7.2 +/-    4.23      17.8 +/-    4.23  0.170 / 0.740
G20     273.7          52.6               10.4 +/-    0.80      12.8 +/-    0.80  0.070 / 0.160
G21     339.5          62.9                8.2 +/-    0.64       9.1 +/-    0.64  0.070 / 0.190
G26     266.3          14.4                9.0 +/-    1.38      22.7 +/-    1.38  0.030 / 0.040
G29     164.9          46.7               10.1 +/-    0.55      13.3 +/-    0.55  0.030 / 0.040