PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-17:28:10
G02     218.0          59.5               17.1 +/-    0.93      19.5 +/-    0.93  0.050 / 0.070
G06     53.4           72.6               13.2 +/-    0.75      13.8 +/-    0.75  0.080 / 0.110
G12     319.6          38.8               11.3 +/-    0.86      16.8 +/-    0.86  0.070 / 0.080
G17     61.2           28.6                9.7 +/-    0.95      17.5 +/-    0.95  0.050 / 0.070
G19     44.6           46.0               10.9 +/-    0.27      14.4 +/-    0.27  0.060 / 0.100
G24     264.8          41.0               15.9 +/-    0.89      22.7 +/-    0.89  0.050 / 0.120
G28     124.6          11.4               14.3 +/-    2.71      38.6 +/-    2.71  0.040 / 0.060