PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-17:12:30
G03     186.3          12.6               14.3 +/-    3.43      37.8 +/-    3.43  0.070 / 0.090
G07     297.9          41.4               11.1 +/-    1.37      15.8 +/-    1.37  0.060 / 0.090
G08     139.7          33.2               14.2 +/-    0.94      23.3 +/-    0.94  0.030 / 0.040
G09     316.8          70.2               11.1 +/-    0.37      11.7 +/-    0.37  0.040 / 0.040
G16     41.7           30.3                8.8 +/-    0.48      15.3 +/-    0.48  0.050 / 0.100
G23     134.8          67.1               12.6 +/-    1.16      13.6 +/-    1.16  0.050 / 0.070
G27     89.0           36.2               11.7 +/-    0.46      18.2 +/-    0.46  0.060 / 0.120
G30     280.4          18.7               10.4 +/-    1.72      23.7 +/-    1.72  0.060 / 0.160