PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/21-15:13:00
G01     101.9          27.2               11.0 +/-    1.02      20.5 +/-    1.02  0.030 / 0.050
G07     114.8          50.3               11.5 +/-    0.54      14.5 +/-    0.54  0.040 / 0.050
G08     41.7           18.3                7.1 +/-    0.82      16.3 +/-    0.82  0.040 / 0.060
G09     174.7          11.3               11.5 +/-    1.45      31.3 +/-    1.45  0.050 / 0.060
G11     82.3           43.2               10.4 +/-    0.82      14.4 +/-    0.82  0.050 / 0.080
G13     305.6          32.1                9.2 +/-    1.98      15.4 +/-    1.98  0.080 / 0.090
G17     207.2          40.2               13.3 +/-    0.41      19.3 +/-    0.41  0.080 / 0.170
G18     74.5           24.4                7.9 +/-    0.75      15.7 +/-    0.75  0.080 / 0.140
G28     314.7          59.7               10.3 +/-    0.84      11.8 +/-    0.84  0.050 / 0.090
G30     60.4           79.0                9.6 +/-    0.46       9.7 +/-    0.46  0.040 / 0.090