PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-15:28:10
G02     217.2          60.4               14.0 +/-    1.27      15.8 +/-    1.27  0.030 / 0.080
G06     55.5           74.1               11.9 +/-    0.88      12.3 +/-    0.88  0.040 / 0.080
G12     319.2          37.3                8.3 +/-    1.03      12.6 +/-    1.03  0.050 / 0.070
G17     60.6           29.1                9.6 +/-    1.33      17.1 +/-    1.33  0.060 / 0.070
G19     43.7           46.5                9.9 +/-    0.72      13.0 +/-    0.72  0.030 / 0.030
G24     265.6          41.1               12.0 +/-    1.63      17.2 +/-    1.63  0.040 / 0.030
G28     124.2          11.8               11.7 +/-    2.35      31.5 +/-    2.35  0.050 / 0.100