PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-17:43:00
G07     352.2          63.5                9.8 +/-    0.60      10.8 +/-    0.60  0.030 / 0.050
G08     89.5           52.1               10.1 +/-    1.38      12.4 +/-    1.38  0.040 / 0.040
G09     188.5          69.9               11.0 +/-    0.57      11.6 +/-    0.57  0.060 / 0.080
G11     141.6          17.1               11.0 +/-    3.03      25.9 +/-    3.03  0.080 / 0.070
G23     157.0          37.1               11.9 +/-    1.11      18.2 +/-    1.11  0.030 / 0.030
G27     52.3           30.5                9.3 +/-    0.85      16.2 +/-    0.85  0.030 / 0.030
G28     239.5          29.0               11.3 +/-    1.56      20.2 +/-    1.56  0.080 / 0.150
G30     306.5          39.5               10.2 +/-    1.01      15.0 +/-    1.01  0.120 / 0.250