PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-17:42:30
G07     4.5            65.6               10.2 +/-    0.42      11.0 +/-    0.42  0.060 / 0.080
G08     79.8           51.7               12.5 +/-    0.67      15.4 +/-    0.67  0.060 / 0.070
G09     184.5          63.7               11.6 +/-    1.19      12.8 +/-    1.19  0.030 / 0.050
G11     137.7          20.8               12.0 +/-    2.46      25.9 +/-    2.46  0.030 / 0.050
G23     158.4          31.2               11.9 +/-    1.04      20.4 +/-    1.04  0.080 / 0.130
G27     47.8           26.9                9.5 +/-    1.64      17.8 +/-    1.64  0.080 / 0.160
G28     244.2          33.3               14.7 +/-    1.75      24.1 +/-    1.75  0.100 / 0.110
G30     311.3          43.6               10.6 +/-    1.03      14.6 +/-    1.03  0.080 / 0.120