PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-18:12:30
G07     9.7            66.4               11.3 +/-    0.67      12.2 +/-    0.67  0.030 / 0.040
G08     75.4           51.1               11.6 +/-    0.99      14.5 +/-    0.99  0.030 / 0.030
G09     183.2          60.9               13.1 +/-    0.68      14.7 +/-    0.68  0.110 / 0.130
G11     135.9          22.5               12.7 +/-    1.84      26.4 +/-    1.84  0.120 / 0.130
G23     159.0          28.9               13.1 +/-    1.50      23.5 +/-    1.50  0.030 / 0.030
G27     46.1           25.3               10.6 +/-    1.56      20.6 +/-    1.56  0.040 / 0.030
G28     246.6          35.3               14.4 +/-    1.25      22.7 +/-    1.25  0.080 / 0.130
G30     313.2          45.2               10.8 +/-    1.26      14.5 +/-    1.26  0.080 / 0.140