PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-17:12:30
G07     353.9          64.4               13.8 +/-    0.97      15.1 +/-    0.97  0.040 / 0.040
G08     80.3           53.4               14.6 +/-    1.45      17.6 +/-    1.45  0.040 / 0.030
G09     182.3          59.8               16.7 +/-    0.43      19.0 +/-    0.43  0.080 / 0.080
G11     138.1          21.2               16.6 +/-    2.84      35.5 +/-    2.84  0.080 / 0.080
G23     157.2          24.0               16.6 +/-    2.64      33.1 +/-    2.64  0.050 / 0.040
G27     44.9           23.5               10.7 +/-    2.65      21.7 +/-    2.65  0.040 / 0.040
G28     249.1          39.5               17.1 +/-    0.98      25.1 +/-    0.98  0.070 / 0.160
G30     313.2          44.8               13.7 +/-    0.82      18.6 +/-    0.82  0.090 / 0.160