PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/20-23:12:50
G01     109.7          23.7                9.9 +/-    0.94      19.9 +/-    0.94  0.030 / 0.030
G07     105.1          56.4                9.6 +/-    0.78      11.3 +/-    0.78  0.030 / 0.040
G08     41.8           20.9                7.7 +/-    3.07      16.5 +/-    3.07  0.050 / 0.060
G09     175.4          16.7               10.0 +/-    1.98      23.9 +/-    1.98  0.040 / 0.050
G11     90.8           42.6                9.8 +/-    1.08      13.7 +/-    1.08  0.180 / 0.250
G13     311.6          27.3                6.8 +/-    1.90      12.7 +/-    1.90  0.200 / 0.310
G17     203.5          36.8                9.8 +/-    1.13      15.0 +/-    1.13  0.080 / 0.120
G18     79.7           22.9                9.1 +/-    1.27      18.7 +/-    1.27  0.080 / 0.160
G28     305.5          58.9                7.9 +/-    1.16       9.1 +/-    1.16  0.110 / 0.170
G30     10.3           76.4                8.7 +/-    0.85       8.9 +/-    0.85  0.130 / 0.170