PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-16:43:10
G07     351.9          63.4                9.8 +/-    0.55      10.8 +/-    0.55  0.090 / 0.080
G08     91.6           52.2               11.0 +/-    0.76      13.5 +/-    0.76  0.100 / 0.100
G09     189.6          70.8               11.9 +/-    0.33      12.5 +/-    0.33  0.030 / 0.050
G11     142.2          16.6               11.0 +/-    1.99      26.3 +/-    1.99  0.040 / 0.040
G23     156.6          37.4               10.4 +/-    1.07      15.8 +/-    1.07  0.070 / 0.180
G27     52.9           30.8                9.1 +/-    1.27      15.6 +/-    1.27  0.150 / 0.170
G28     238.8          28.2               12.3 +/-    1.60      22.4 +/-    1.60  0.090 / 0.100
G30     306.2          39.5                9.5 +/-    1.11      14.0 +/-    1.11  0.070 / 0.090