PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-22:58:10
G02     204.5          40.2               13.4 +/-    1.45      19.4 +/-    1.45  0.050 / 0.090
G06     159.7          72.0               13.5 +/-    0.30      14.1 +/-    0.30  0.140 / 0.090
G12     308.8          16.6                8.1 +/-    2.65      19.5 +/-    2.65  0.260 / 0.290
G17     40.8           45.0               10.2 +/-    0.91      13.7 +/-    0.91  0.200 / 0.300
G19     10.8           62.3               10.8 +/-    0.56      12.1 +/-    0.56  0.050 / 0.040
G24     291.0          40.8               10.7 +/-   11.59      15.4 +/-   11.59  0.040 / 0.050
G28     104.8          31.8               11.1 +/-    1.04      18.8 +/-    1.04  0.050 / 0.110