PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/21-17:57:40
G07     326.3          55.3               14.4 +/-    0.48      17.1 +/-    0.48  0.040 / 0.050
G08     112.1          50.8               17.0 +/-    0.56      21.2 +/-    0.56  0.040 / 0.040
G09     203.1          78.2               15.3 +/-    0.28      15.6 +/-    0.28  0.040 / 0.070
G11     149.7          10.2                0.8 +/-   31.12       2.4 +/-   31.12  0.040 / 0.080
G23     152.5          41.4               16.2 +/-    0.80      23.0 +/-    0.80  0.070 / 0.130
G27     58.8           33.3               12.6 +/-    1.38      20.7 +/-    1.38  0.120 / 0.130
G28     234.4          26.6               16.7 +/-    1.98      31.5 +/-    1.98  0.050 / 0.050
G30     299.6          33.8               12.2 +/-    1.54      19.8 +/-    1.54  0.040 / 0.040