PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/27-19:28:00
G07     319.0          52.1               12.7 +/-    0.42      15.6 +/-    0.42  0.030 / 0.040
G08     121.0          47.6               16.4 +/-    0.75      21.4 +/-    0.75  0.030 / 0.040
G09     235.6          82.2               13.7 +/-    0.23      13.8 +/-    0.23  0.030 / 0.030
G16     44.1           14.5                8.9 +/-    2.76      22.4 +/-    2.76  0.030 / 0.020
G23     150.4          48.8               15.6 +/-    0.73      20.0 +/-    0.73  0.080 / 0.230
G27     64.9           35.3               13.7 +/-    1.23      21.6 +/-    1.23  0.120 / 0.240
G28     230.5          22.1               17.0 +/-    2.87      35.6 +/-    2.87  0.040 / 0.040
G30     295.6          31.0               13.6 +/-    1.89      23.3 +/-    1.89  0.030 / 0.050