PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-21:27:50
G07     311.0          48.3               12.7 +/-    0.52      16.4 +/-    0.52  0.300 / 0.180
G08     126.8          43.1               15.1 +/-    0.79      20.9 +/-    0.79  0.320 / 0.300
G09     289.3          80.7               13.3 +/-    0.63      13.4 +/-    0.63  0.050 / 0.050
G16     42.5           21.4               11.5 +/-    2.39      24.5 +/-    2.39  0.060 / 0.070
G23     146.8          57.7               15.3 +/-    0.39      17.7 +/-    0.39  0.050 / 0.060
G27     73.1           36.7               13.2 +/-    0.61      20.3 +/-    0.61  0.040 / 0.050
G28     226.3          16.5               15.5 +/-    2.64      37.0 +/-    2.64  0.160 / 0.260
G30     290.8          27.9               10.9 +/-    1.72      20.0 +/-    1.72  0.200 / 0.200