PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/21-18:58:00
G07     328.9          57.1               11.3 +/-    0.54      13.2 +/-    0.54  0.040 / 0.050
G08     109.5          48.6               13.2 +/-    0.52      17.0 +/-    0.52  0.050 / 0.050
G09     221.7          81.5               12.7 +/-    0.35      12.8 +/-    0.35  0.050 / 0.060
G16     44.0           18.1                8.7 +/-    1.86      20.1 +/-    1.86  0.070 / 0.070
G23     152.7          51.3               14.3 +/-    0.36      17.7 +/-    0.36  0.120 / 0.300
G27     65.7           36.3               12.8 +/-    1.13      19.8 +/-    1.13  0.250 / 0.490
G28     230.6          19.4               12.5 +/-    1.98      28.0 +/-    1.98  0.030 / 0.020
G30     295.9          30.5               10.6 +/-    1.57      18.3 +/-    1.57  0.030 / 0.030