PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-15:13:10
G05     47.5           21.5                6.5 +/-    2.01      13.7 +/-    2.01  0.110 / 0.230
G13     79.0           36.1                8.9 +/-    1.69      13.8 +/-    1.69  0.170 / 0.340
G15     131.8          50.1                8.4 +/-    0.50      10.5 +/-    0.50  0.050 / 0.060
G16     317.0          10.9               -2.4 +/-   12.86      -6.6 +/-   12.86  0.040 / 0.060
G20     245.7          34.9                8.6 +/-    2.41      13.6 +/-    2.41  0.160 / 0.360
G21     312.5          46.9                7.1 +/-    1.52       9.3 +/-    1.52  0.210 / 0.400
G25     196.8          10.8                8.0 +/-    4.41      22.1 +/-    4.41  0.020 / 0.020
G26     292.0          19.8                5.5 +/-    0.94      12.1 +/-    0.94  0.030 / 0.020
G29     150.9          74.7                8.0 +/-    0.44       8.2 +/-    0.44  0.190 / 0.250