PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-20:27:40
G10     245.4          22.4               13.2 +/-    2.23      27.5 +/-    2.23  0.040 / 0.060
G13     59.7           32.8                9.0 +/-    0.61      14.9 +/-    0.61  0.040 / 0.070
G15     110.8          59.0               10.7 +/-    0.48      12.3 +/-    0.48  0.070 / 0.140
G16     301.3          15.6                6.0 +/-    2.55      14.7 +/-    2.55  0.070 / 0.140
G20     261.7          46.5               11.0 +/-    0.73      14.6 +/-    0.73  0.150 / 0.200
G21     326.4          55.7                8.8 +/-    0.56      10.4 +/-    0.56  0.120 / 0.190
G26     273.7          17.8                8.5 +/-    0.98      19.8 +/-    0.98  0.030 / 0.060
G29     162.8          57.9               11.3 +/-    1.03      13.1 +/-    1.03  0.040 / 0.050