PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-16:43:00
G07     319.8          54.0               13.2 +/-    1.42      15.9 +/-    1.42  0.040 / 0.050
G08     120.9          44.3               15.4 +/-    0.80      21.0 +/-    0.80  0.050 / 0.060
G09     283.9          81.5               13.9 +/-    1.03      14.0 +/-    1.03  0.040 / 0.060
G16     42.6           23.0               10.5 +/-    1.09      21.6 +/-    1.09  0.040 / 0.050
G23     148.1          58.3               15.6 +/-    0.41      18.0 +/-    0.41  0.120 / 0.140
G27     74.8           37.6               13.0 +/-    0.68      19.7 +/-    0.68  0.120 / 0.140
G28     226.2          12.7               12.8 +/-    5.26      33.7 +/-    5.26  0.030 / 0.030
G30     290.5          26.6               14.4 +/-    2.71      27.1 +/-    2.71  0.040 / 0.040