PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-17:43:00
G07     9.0            66.2               11.7 +/-    0.59      12.6 +/-    0.59  0.030 / 0.040
G08     76.7           51.3               12.4 +/-    1.09      15.3 +/-    1.09  0.040 / 0.040
G09     183.6          61.6               14.0 +/-    0.76      15.7 +/-    0.76  0.090 / 0.110
G11     136.4          22.1               13.0 +/-    1.51      27.3 +/-    1.51  0.100 / 0.150
G23     158.7          29.3               13.6 +/-    1.23      24.1 +/-    1.23  0.110 / 0.130
G27     46.5           25.7               11.4 +/-    2.14      21.9 +/-    2.14  0.150 / 0.150
G28     245.9          34.7               13.4 +/-    1.62      21.3 +/-    1.62  0.030 / 0.030
G30     312.9          45.0               11.1 +/-    1.20      14.9 +/-    1.20  0.030 / 0.040