PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-16:57:40
G07     332.5          57.8               10.7 +/-    0.80      12.5 +/-    0.80  0.030 / 0.050
G08     103.3          52.6               13.0 +/-    0.47      15.9 +/-    0.47  0.030 / 0.050
G09     192.0          73.6               12.7 +/-    1.46      13.2 +/-    1.46  0.060 / 0.100
G11     146.6          13.0               14.0 +/-    2.26      36.5 +/-    2.26  0.070 / 0.100
G23     154.0          36.5               12.5 +/-    1.51      19.4 +/-    1.51  0.070 / 0.090
G27     54.5           31.3               11.7 +/-    0.85      19.9 +/-    0.85  0.070 / 0.090
G28     237.7          30.0               11.0 +/-    1.88      19.3 +/-    1.88  0.090 / 0.460
G30     302.9          36.2               10.9 +/-    0.66      16.9 +/-    0.66  0.100 / 0.460