PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-21:57:50
G07     311.8          48.7                8.5 +/-    1.15      10.9 +/-    1.15  0.100 / 0.270
G08     125.6          43.7               11.7 +/-    0.68      16.1 +/-    0.68  0.080 / 0.350
G09     285.8          81.1                8.7 +/-    1.29       8.8 +/-    1.29  0.120 / 0.240
G16     42.6           21.1                8.3 +/-    1.57      17.8 +/-    1.57  0.130 / 0.250
G23     147.3          57.4               10.7 +/-    1.07      12.5 +/-    1.07  0.040 / 0.080
G27     72.3           36.6                7.0 +/-    0.86      10.9 +/-    0.86  0.050 / 0.070
G28     226.7          17.1               11.2 +/-    2.02      26.5 +/-    2.02  0.060 / 0.070
G30     291.5          28.7                8.4 +/-    1.25      15.2 +/-    1.25  0.080 / 0.100