PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-19:27:50
G07     334.4          58.4               11.7 +/-    0.35      13.5 +/-    0.35  0.030 / 0.040
G08     104.1          53.2               15.1 +/-    0.89      18.4 +/-    0.89  0.040 / 0.040
G09     192.0          72.7               14.0 +/-    0.68      14.6 +/-    0.68  0.060 / 0.080
G11     146.6          13.4               14.8 +/-    2.78      38.2 +/-    2.78  0.070 / 0.080
G23     154.8          36.6               13.9 +/-    0.87      21.5 +/-    0.87  0.030 / 0.050
G27     53.2           30.4               11.8 +/-    1.78      20.4 +/-    1.78  0.030 / 0.040
G28     238.8          31.2               15.4 +/-    1.41      26.3 +/-    1.41  0.080 / 0.100
G30     304.7          38.1               11.5 +/-    1.78      17.3 +/-    1.78  0.060 / 0.090