PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/09-22:27:40
G07     314.8          50.1                6.2 +/-    0.90       7.8 +/-    0.90  0.170 / 0.420
G08     122.3          45.4               10.1 +/-    0.72      13.6 +/-    0.72  0.220 / 0.550
G09     268.3          82.3               10.0 +/-    1.09      10.1 +/-    1.09  0.050 / 0.060
G16     43.0           19.1                6.3 +/-    3.13      14.1 +/-    3.13  0.040 / 0.050
G23     149.0          55.0                8.4 +/-    0.58      10.0 +/-    0.58  0.040 / 0.060
G27     69.1           36.1                6.7 +/-    1.22      10.5 +/-    1.22  0.040 / 0.060
G28     228.2          19.2                8.4 +/-    2.93      18.9 +/-    2.93  0.140 / 0.370
G30     293.4          30.0                7.8 +/-    1.82      13.7 +/-    1.82  0.250 / 0.240