PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/25-21:42:40
G07     326.6          55.4               10.5 +/-    0.41      12.4 +/-    0.41  0.080 / 0.210
G08     110.2          50.8               12.2 +/-    0.56      15.3 +/-    0.56  0.120 / 0.160
G09     205.6          78.5               11.2 +/-    0.31      11.4 +/-    0.31  0.050 / 0.070
G16     45.6           10.9                8.5 +/-    3.11      23.3 +/-    3.11  0.050 / 0.070
G23     153.4          44.3               12.6 +/-    0.57      17.1 +/-    0.57  0.130 / 0.320
G27     58.5           33.1                9.7 +/-    1.41      16.0 +/-    1.41  0.220 / 0.350
G28     234.5          26.9               10.3 +/-    1.85      19.3 +/-    1.85  0.040 / 0.040
G30     300.9          35.7               10.4 +/-    1.66      16.3 +/-    1.66  0.040 / 0.040