PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-17:43:00
G07     312.9          49.2               10.9 +/-    0.97      13.8 +/-    0.97  0.060 / 0.080
G08     126.7          44.2               15.0 +/-    0.89      20.5 +/-    0.89  0.050 / 0.090
G09     275.1          82.2               11.7 +/-    0.86      11.8 +/-    0.86  0.040 / 0.070
G16     43.0           18.1                8.2 +/-    1.04      18.9 +/-    1.04  0.040 / 0.060
G23     147.2          52.8               14.0 +/-    1.10      17.0 +/-    1.10  0.120 / 0.410
G27     71.1           36.6               10.6 +/-    0.69      16.3 +/-    0.69  0.150 / 0.450
G28     227.3          17.8               14.1 +/-    2.29      32.8 +/-    2.29  0.040 / 0.070
G30     291.1          27.1               10.9 +/-    2.88      20.4 +/-    2.88  0.030 / 0.060