PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-17:43:10
G07     320.3          52.7               11.9 +/-    0.44      14.5 +/-    0.44  0.130 / 0.240
G08     118.8          48.3               14.1 +/-    0.41      18.2 +/-    0.41  0.150 / 0.230
G09     224.7          81.7               13.0 +/-    0.31      13.1 +/-    0.31  0.030 / 0.050
G16     44.4           13.0                8.5 +/-    2.64      22.2 +/-    2.64  0.050 / 0.050
G23     150.5          46.1               14.1 +/-    0.50      18.7 +/-    0.50  0.030 / 0.050
G27     63.8           35.1               12.7 +/-    1.09      20.1 +/-    1.09  0.030 / 0.060
G28     231.2          22.9               13.0 +/-    3.38      26.7 +/-    3.38  0.040 / 0.060
G30     295.9          30.8               13.3 +/-    1.17      22.8 +/-    1.17  0.050 / 0.050