PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/06-16:57:40
G07     327.2          55.7                9.2 +/-    1.29      10.8 +/-    1.29  0.040 / 0.040
G08     109.7          51.1               12.8 +/-    0.83      15.9 +/-    0.83  0.030 / 0.050
G09     199.9          77.4               10.4 +/-    1.05      10.6 +/-    1.05  0.050 / 0.070
G11     149.0          10.7                3.6 +/-   24.58       9.8 +/-   24.58  0.050 / 0.050
G23     152.6          40.2               13.0 +/-    0.82      18.8 +/-    0.82  0.040 / 0.080
G27     58.2           33.1                9.6 +/-    0.78      15.8 +/-    0.78  0.050 / 0.080
G28     234.8          27.0               13.3 +/-    1.01      24.8 +/-    1.01  0.170 / 0.600
G30     299.8          33.7                9.2 +/-    0.67      15.0 +/-    0.67  0.150 / 0.560