PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-13:43:10
G02     201.8          27.3                6.9 +/-    2.03      12.8 +/-    2.03  0.080 / 0.110
G06     168.6          61.4                7.3 +/-    0.73       8.1 +/-    0.73  0.070 / 0.110
G17     32.8           51.9                4.3 +/-    0.87       5.3 +/-    0.87  0.030 / 0.100
G19     352.2          68.0                3.7 +/-    0.64       3.9 +/-    0.64  0.030 / 0.040
G24     305.7          33.3                4.7 +/-    2.49       7.7 +/-    2.49  0.040 / 0.030
G28     96.7           34.7                5.7 +/-    0.75       9.2 +/-    0.75  0.040 / 0.030