PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-17:42:30
G07     335.3          58.8               10.7 +/-    0.48      12.3 +/-    0.48  0.030 / 0.040
G08     100.9          53.2               15.2 +/-    0.66      18.5 +/-    0.66  0.040 / 0.050
G09     190.0          71.8               12.4 +/-    0.80      13.0 +/-    0.80  0.060 / 0.100
G11     145.6          14.1               13.5 +/-    1.55      34.4 +/-    1.55  0.090 / 0.110
G23     154.6          34.5               13.5 +/-    1.08      21.6 +/-    1.08  0.030 / 0.040
G27     52.7           30.2               11.6 +/-    2.16      20.2 +/-    2.16  0.040 / 0.040
G28     239.3          31.6               13.3 +/-    1.65      22.5 +/-    1.65  0.090 / 0.130
G30     304.6          37.7               11.5 +/-    1.48      17.4 +/-    1.48  0.070 / 0.080