PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/10-10:28:10
G07     46.9           68.7                3.5 +/-    0.32       3.8 +/-    0.32  0.030 / 0.030
G08     52.7           40.8                3.2 +/-    0.72       4.6 +/-    0.72  0.030 / 0.040
G09     176.6          38.3                5.8 +/-    1.02       8.7 +/-    1.02  0.030 / 0.050
G11     120.1          32.0                4.3 +/-    1.54       7.2 +/-    1.54  0.040 / 0.050
G17     198.8          13.3                2.7 +/-    2.50       7.1 +/-    2.50  0.060 / 0.080
G23     161.2          13.0                4.2 +/-    2.56      11.0 +/-    2.56  0.050 / 0.070
G28     270.9          50.9                1.9 +/-    1.12       2.4 +/-    1.12  0.050 / 0.310
G30     327.1          55.8                2.8 +/-    1.00       3.3 +/-    1.00  0.060 / 0.360