PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/21-19:57:50
G01     320.9          12.0               -2.2 +/-   33.89      -5.8 +/-   33.89  0.040 / 0.040
G08     261.8          16.8               10.2 +/-    0.97      24.3 +/-    0.97  0.040 / 0.040
G10     68.3           56.3                9.4 +/-    0.49      11.0 +/-    0.49  0.320 / 0.380
G11     308.1          20.3                7.3 +/-    2.61      15.9 +/-    2.61  0.120 / 0.210
G14     276.2          68.6                9.7 +/-    0.74      10.4 +/-    0.74  0.210 / 0.480
G20     98.9           34.0                8.9 +/-    1.64      14.4 +/-    1.64  0.140 / 0.480
G21     154.7          10.0                9.7 +/-    4.12      27.0 +/-    4.12  0.150 / 0.360
G27     231.0          14.0                8.9 +/-    2.90      22.6 +/-    2.90  0.100 / 0.220
G31     179.3          32.2               10.5 +/-    1.74      17.6 +/-    1.74  0.150 / 0.190
G32     349.6          72.4                9.7 +/-    0.39      10.1 +/-    0.39  0.210 / 0.220