PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-21:42:50
G07     308.2          46.9               14.0 +/-    1.22      18.3 +/-    1.22  0.040 / 0.080
G08     129.2          41.3               14.9 +/-    0.95      21.1 +/-    0.95  0.050 / 0.060
G09     300.2          78.8               12.5 +/-    0.59      12.7 +/-    0.59  0.140 / 0.440
G16     42.1           23.7                9.1 +/-    1.40      18.3 +/-    1.40  0.210 / 0.460
G23     144.9          60.6               15.5 +/-    1.22      17.5 +/-    1.22  0.110 / 0.220
G27     76.3           36.9               11.0 +/-    0.72      16.8 +/-    0.72  0.120 / 0.220
G28     225.0          14.4               14.8 +/-    2.30      37.2 +/-    2.30  0.060 / 0.080
G30     288.8          26.5               12.7 +/-    1.10      24.0 +/-    1.10  0.050 / 0.080