PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/21-21:42:40
G07     10.9           66.8               13.0 +/-    0.91      14.0 +/-    0.91  0.030 / 0.030
G08     70.2           49.5               13.0 +/-    1.08      16.4 +/-    1.08  0.030 / 0.030
G09     181.2          57.3               16.2 +/-    0.42      18.8 +/-    0.42  0.050 / 0.040
G11     133.7          24.1               17.2 +/-    3.01      34.4 +/-    3.01  0.040 / 0.040
G23     159.9          27.6               14.8 +/-    1.65      27.2 +/-    1.65  0.120 / 0.100
G27     44.9           24.2               11.0 +/-    2.11      21.9 +/-    2.11  0.150 / 0.100
G28     249.3          37.9               15.4 +/-    1.48      23.2 +/-    1.48  0.080 / 0.130
G30     314.2          45.6               12.5 +/-    0.98      16.7 +/-    0.98  0.060 / 0.130