PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/05-18:28:00
G07     306.6          46.0               14.2 +/-    1.42      18.9 +/-    1.42  0.070 / 0.070
G08     133.7          39.6               16.9 +/-    0.69      24.8 +/-    0.69  0.080 / 0.080
G09     303.7          77.9               12.9 +/-    0.26      13.1 +/-    0.26  0.030 / 0.040
G16     42.0           23.3               10.8 +/-    1.40      21.9 +/-    1.40  0.040 / 0.060
G23     143.4          59.5               15.0 +/-    0.40      17.2 +/-    0.40  0.040 / 0.080
G27     78.3           37.1               13.3 +/-    1.04      20.3 +/-    1.04  0.040 / 0.080
G28     224.3          13.2               13.6 +/-    1.44      35.3 +/-    1.44  0.110 / 0.130
G30     286.9          24.0               13.1 +/-    1.55      26.2 +/-    1.55  0.190 / 0.220