PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-14:42:50
G02     218.4          62.4               11.9 +/-    1.18      13.3 +/-    1.18  0.110 / 0.070
G06     52.9           73.3                8.8 +/-    0.75       9.1 +/-    0.75  0.060 / 0.070
G12     319.5          38.4                6.7 +/-    1.09      10.0 +/-    1.09  0.090 / 0.110
G17     61.7           28.3                5.4 +/-    1.06       9.8 +/-    1.06  0.090 / 0.080
G19     45.1           45.6                5.6 +/-    0.68       7.5 +/-    0.68  0.030 / 0.030
G24     263.7          40.7               10.4 +/-    1.42      14.9 +/-    1.42  0.040 / 0.040
G28     125.1          10.7               10.2 +/-    5.21      27.9 +/-    5.21  0.040 / 0.100