PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-17:42:40
G07     59.7           66.8                9.2 +/-    0.63       9.9 +/-    0.63  0.030 / 0.030
G08     53.1           41.8                9.4 +/-    0.44      13.3 +/-    0.44  0.030 / 0.040
G09     179.4          41.2               13.5 +/-    1.09      19.2 +/-    1.09  0.060 / 0.080
G11     120.6          34.1               13.2 +/-    1.02      21.3 +/-    1.02  0.060 / 0.080
G17     199.0          11.7                8.5 +/-   20.32      22.9 +/-   20.32  0.050 / 0.110
G18     104.8          14.9               12.7 +/-    1.05      31.6 +/-    1.05  0.050 / 0.120
G23     160.5          10.7                9.6 +/-    4.50      26.3 +/-    4.50  0.170 / 0.330
G27     38.1           11.3                8.7 +/-    1.91      23.4 +/-    1.91  0.220 / 0.460
G28     266.5          47.2               14.0 +/-    1.18      18.3 +/-    1.18  0.090 / 0.230
G30     331.3          59.5                8.9 +/-    0.80      10.2 +/-    0.80  0.080 / 0.230