PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/11-05:12:40
G10     275.4          43.6                9.2 +/-    1.75      12.7 +/-    1.75  0.070 / 0.060
G13     38.9           12.0                4.5 +/-    1.22      12.0 +/-    1.22  0.070 / 0.060
G15     52.3           41.9                7.4 +/-    0.75      10.4 +/-    0.75  0.050 / 0.050
G20     312.5          63.0                8.8 +/-    1.16       9.7 +/-    1.16  0.040 / 0.050
G21     28.6           75.5                8.1 +/-    1.12       8.3 +/-    1.12  0.140 / 0.130
G24     114.0          18.3                7.4 +/-    1.19      17.0 +/-    1.19  0.140 / 0.170
G27     315.8          23.0                7.8 +/-    2.77      16.0 +/-    2.77  0.160 / 0.300
G29     166.4          21.1                9.1 +/-    1.91      19.6 +/-    1.91  0.220 / 0.510
G32     206.2          12.0               -1.8 +/-   36.33      -4.8 +/-   36.33  0.050 / 0.060