PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/23-18:57:50
G03     186.2          13.8               16.5 +/-    2.18      42.1 +/-    2.18  0.070 / 0.080
G07     295.4          40.0               12.0 +/-    3.50      17.4 +/-    3.50  0.060 / 0.090
G08     141.7          31.1               17.7 +/-    1.09      30.4 +/-    1.09  0.020 / 0.030
G09     318.4          67.3               12.0 +/-    0.68      12.9 +/-    0.68  0.030 / 0.030
G16     41.8           33.3               11.8 +/-    1.19      19.3 +/-    1.19  0.040 / 0.030
G23     130.8          71.2               13.7 +/-    0.52      14.4 +/-    0.52  0.030 / 0.030
G27     92.0           35.6               14.4 +/-    1.13      22.5 +/-    1.13  0.190 / 0.230
G30     278.8          18.1               13.3 +/-    1.82      30.6 +/-    1.82  0.210 / 0.250