PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-18:12:30
G07     339.2          60.1               11.5 +/-    0.42      13.0 +/-    0.42  0.040 / 0.040
G08     97.0           53.9               14.0 +/-    0.88      16.8 +/-    0.88  0.030 / 0.040
G09     187.7          69.1               12.5 +/-    1.19      13.3 +/-    1.19  0.060 / 0.120
G11     144.1          15.7               16.3 +/-    3.70      39.9 +/-    3.70  0.050 / 0.090
G23     155.4          32.3               12.8 +/-    1.39      21.5 +/-    1.39  0.030 / 0.040
G27     50.6           28.7               11.0 +/-    2.11      19.8 +/-    2.11  0.030 / 0.050
G28     241.4          33.6               12.2 +/-    0.76      20.0 +/-    0.76  0.060 / 0.100
G30     306.8          39.6               11.0 +/-    1.03      16.1 +/-    1.03  0.080 / 0.100