PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-20:43:10
G07     301.1          43.2               11.2 +/-    1.15      15.5 +/-    1.15  0.060 / 0.120
G08     136.0          36.1               17.3 +/-    1.06      27.0 +/-    1.06  0.050 / 0.130
G09     313.9          72.7                9.7 +/-    0.82      10.2 +/-    0.82  0.040 / 0.080
G16     41.6           29.1                8.8 +/-    0.54      15.7 +/-    0.54  0.060 / 0.100
G23     138.6          66.9               13.6 +/-    1.18      14.7 +/-    1.18  0.040 / 0.070
G27     84.7           36.7               12.7 +/-    0.80      19.5 +/-    0.80  0.040 / 0.080
G30     283.5          22.2               10.4 +/-    2.32      21.8 +/-    2.32  0.030 / 0.040