PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/29-14:28:10
G07     37.1           69.7                7.6 +/-    1.02       8.0 +/-    1.02  0.030 / 0.040
G08     54.8           43.5                7.3 +/-    0.73      10.1 +/-    0.73  0.040 / 0.050
G09     177.8          40.3                8.9 +/-    1.18      12.9 +/-    1.18  0.040 / 0.040
G11     123.2          32.4                7.3 +/-    0.98      12.2 +/-    0.98  0.030 / 0.030
G18     108.1          14.2                7.7 +/-    2.08      19.6 +/-    2.08  0.030 / 0.040
G23     159.9          10.4                7.6 +/-    3.91      21.0 +/-    3.91  0.020 / 0.020
G27     38.0           11.1                6.7 +/-    5.18      18.1 +/-    5.18  0.250 / 0.480
G28     269.0          50.2                8.0 +/-    2.63      10.1 +/-    2.63  0.200 / 0.440
G30     327.2          56.3                7.7 +/-    0.63       9.0 +/-    0.63  0.070 / 0.070