PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-16:58:10
G07     346.7          62.3               10.7 +/-    0.50      11.9 +/-    0.50  0.040 / 0.040
G08     95.8           51.8               12.3 +/-    0.47      15.1 +/-    0.47  0.040 / 0.040
G09     192.9          73.4               11.8 +/-    0.62      12.3 +/-    0.62  0.090 / 0.240
G11     143.8          15.0               13.8 +/-    2.03      34.3 +/-    2.03  0.200 / 0.260
G23     155.9          40.3               12.7 +/-    0.79      18.3 +/-    0.79  0.060 / 0.080
G27     55.3           32.2                8.8 +/-    0.90      14.7 +/-    0.90  0.080 / 0.080
G28     236.8          26.3               13.9 +/-    3.41      26.4 +/-    3.41  0.060 / 0.070
G30     304.0          37.6               10.3 +/-    1.08      15.6 +/-    1.08  0.090 / 0.070