PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/20-18:12:30
G07     333.4          58.1               10.7 +/-    0.66      12.3 +/-    0.66  0.030 / 0.050
G08     103.9          52.9               11.1 +/-    0.50      13.5 +/-    0.50  0.030 / 0.040
G09     192.1          73.2               13.3 +/-    0.34      13.8 +/-    0.34  0.080 / 0.070
G11     146.6          13.2               16.1 +/-    1.99      41.7 +/-    1.99  0.060 / 0.080
G23     154.3          36.3               12.6 +/-    1.07      19.5 +/-    1.07  0.030 / 0.050
G27     53.8           30.9               10.0 +/-    2.26      17.2 +/-    2.26  0.030 / 0.040
G28     238.2          30.6               12.6 +/-    1.31      21.7 +/-    1.31  0.110 / 0.130
G30     303.7          37.1               10.0 +/-    1.49      15.3 +/-    1.49  0.100 / 0.120