PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/18-18:12:40
G03     187.7          17.2               11.4 +/-    2.22      26.9 +/-    2.22  0.160 / 0.120
G07     296.0          43.0               10.9 +/-    4.40      15.1 +/-    4.40  0.210 / 0.210
G08     138.2          30.2               12.7 +/-    0.87      22.1 +/-    0.87  0.050 / 0.090
G09     319.9          64.3               10.3 +/-    1.14      11.3 +/-    1.14  0.050 / 0.070
G16     43.3           42.0                8.7 +/-    0.94      12.3 +/-    0.94  0.190 / 0.190
G23     120.6          78.7               10.2 +/-    0.82      10.4 +/-    0.82  0.120 / 0.180
G26     44.1           13.3                7.3 +/-    3.21      19.0 +/-    3.21  0.100 / 0.310
G27     99.7           34.6               11.5 +/-    0.87      18.4 +/-    0.87  0.120 / 0.340
G30     275.6          14.4                9.4 +/-    2.96      23.8 +/-    2.96  0.040 / 0.020