PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/16-21:12:30
G07     327.2          56.4               10.9 +/-    0.64      12.8 +/-    0.64  0.310 / 0.400
G08     108.5          48.6               11.8 +/-    0.61      15.1 +/-    0.61  0.220 / 0.430
G09     216.1          81.4               10.1 +/-    0.59      10.2 +/-    0.59  0.080 / 0.060
G16     44.1           17.0                8.3 +/-    2.75      19.7 +/-    2.75  0.060 / 0.050
G23     153.0          52.1               12.8 +/-    1.10      15.8 +/-    1.10  0.030 / 0.040
G27     66.2           36.6               10.9 +/-    1.18      16.8 +/-    1.18  0.040 / 0.050
G28     230.7          19.9               11.0 +/-    1.94      24.2 +/-    1.94  0.030 / 0.020
G30     295.4          29.7               10.8 +/-    2.17      19.0 +/-    2.17  0.020 / 0.020