PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-22:43:10
G07     350.4          63.4                9.8 +/-    1.06      10.8 +/-    1.06  0.060 / 0.110
G08     83.4           53.4                9.4 +/-    0.54      11.4 +/-    0.54  0.060 / 0.120
G09     184.5          62.9               13.1 +/-    1.67      14.5 +/-    1.67  0.030 / 0.040
G11     141.1          19.2               11.8 +/-    2.46      26.6 +/-    2.46  0.030 / 0.050
G23     157.9          29.1               11.5 +/-    0.95      20.6 +/-    0.95  0.050 / 0.110
G27     45.9           24.5                8.7 +/-    2.05      17.2 +/-    2.05  0.050 / 0.100
G28     247.3          38.4               12.4 +/-    1.89      18.5 +/-    1.89  0.140 / 0.440
G30     314.0          46.1                8.2 +/-    0.99      10.8 +/-    0.99  0.130 / 0.490