PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/29-15:58:00
G07     352.8          64.1               17.7 +/-    0.83      19.4 +/-    0.83  0.040 / 0.040
G08     80.1           53.0               17.6 +/-    0.71      21.4 +/-    0.71  0.050 / 0.040
G09     181.9          60.1               18.4 +/-    0.71      20.9 +/-    0.71  0.040 / 0.040
G11     138.2          20.9               18.1 +/-    2.60      39.0 +/-    2.60  0.050 / 0.030
G23     157.5          25.6               16.6 +/-    1.23      32.0 +/-    1.23  0.080 / 0.070
G27     45.3           24.1               15.0 +/-    2.04      29.9 +/-    2.04  0.070 / 0.070
G28     248.4          39.0               20.1 +/-    1.27      29.7 +/-    1.27  0.090 / 0.160
G30     312.3          43.9               16.6 +/-    0.77      22.7 +/-    0.77  0.080 / 0.120