PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/11-23:12:30
G07     350.9          63.5                7.9 +/-    0.35       8.8 +/-    0.35  0.060 / 0.120
G08     82.6           53.3                7.4 +/-    1.06       9.0 +/-    1.06  0.050 / 0.100
G09     184.4          62.7                9.7 +/-    1.01      10.8 +/-    1.01  0.040 / 0.040
G11     140.7          19.3               10.7 +/-    1.50      23.8 +/-    1.50  0.040 / 0.040
G23     158.1          29.2                9.7 +/-    0.79      17.2 +/-    0.79  0.090 / 0.200
G27     45.8           24.3                6.7 +/-    2.38      13.3 +/-    2.38  0.090 / 0.120
G28     247.5          38.6                9.1 +/-    1.23      13.6 +/-    1.23  0.030 / 0.040
G30     314.3          46.3                7.3 +/-    0.55       9.6 +/-    0.55  0.030 / 0.040