PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-18:27:50
G07     332.5          57.7               10.5 +/-    0.63      12.2 +/-    0.63  0.040 / 0.020
G08     105.4          52.7               12.2 +/-    0.73      14.9 +/-    0.73  0.030 / 0.020
G09     193.3          73.9               12.1 +/-    0.76      12.6 +/-    0.76  0.060 / 0.090
G11     147.1          12.8               14.4 +/-    2.37      37.6 +/-    2.37  0.070 / 0.080
G23     154.2          37.2               11.8 +/-    0.83      18.0 +/-    0.83  0.110 / 0.030
G27     54.4           31.2                9.2 +/-    2.18      15.7 +/-    2.18  0.080 / 0.030
G28     237.7          30.2               12.4 +/-    1.27      21.7 +/-    1.27  0.040 / 0.010
G30     303.3          36.8               10.3 +/-    1.19      15.9 +/-    1.19  0.040 / 0.020