PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/20-16:58:10
G01     320.7          13.9              -13.0 +/-   27.48     -33.2 +/-   27.48  0.210 / 0.310
G08     263.6          17.4                8.0 +/-    1.34      18.7 +/-    1.34  0.270 / 0.220
G10     68.4           55.3                8.2 +/-    1.45       9.7 +/-    1.45  0.040 / 0.050
G11     312.8          15.2                2.1 +/-    3.48       5.3 +/-    3.48  0.040 / 0.060
G14     266.3          64.6                8.9 +/-    0.96       9.8 +/-    0.96  0.190 / 0.320
G20     99.9           31.3                7.1 +/-    2.10      12.1 +/-    2.10  0.140 / 0.340
G21     155.3          11.9                8.5 +/-    1.46      22.9 +/-    1.46  0.100 / 0.170
G27     229.4          14.5                9.1 +/-    1.91      22.8 +/-    1.91  0.120 / 0.180
G31     178.3          32.3                9.1 +/-    1.62      15.2 +/-    1.62  0.030 / 0.030
G32     354.2          72.3                7.4 +/-    0.45       7.7 +/-    0.45  0.030 / 0.020