PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-22:28:00
G07     350.7          63.5               10.0 +/-    0.64      11.1 +/-    0.64  0.030 / 0.040
G08     83.4           53.5               10.2 +/-    0.64      12.3 +/-    0.64  0.040 / 0.050
G09     184.4          62.7               14.8 +/-    1.31      16.4 +/-    1.31  0.050 / 0.100
G11     141.1          19.2               13.2 +/-    3.61      29.5 +/-    3.61  0.060 / 0.110
G23     157.9          28.8               13.0 +/-    1.07      23.4 +/-    1.07  0.060 / 0.120
G27     45.8           24.4                9.3 +/-    1.50      18.4 +/-    1.50  0.060 / 0.100
G28     247.5          38.5               13.6 +/-    2.15      20.2 +/-    2.15  0.070 / 0.100
G30     314.0          46.1                8.9 +/-    1.14      11.9 +/-    1.14  0.060 / 0.130