PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-04:27:40
G01     244.4          31.8                8.9 +/-    2.18      14.9 +/-    2.18  0.030 / 0.030
G03     314.4          47.1                8.5 +/-    0.80      11.1 +/-    0.80  0.030 / 0.040
G14     67.5           35.8                6.4 +/-    1.84      10.0 +/-    1.84  0.100 / 0.240
G16     162.6          22.3               11.1 +/-    2.49      23.0 +/-    2.49  0.140 / 0.180
G22     295.3          70.6                8.0 +/-    0.51       8.4 +/-    0.51  0.120 / 0.080
G23     290.4          21.6                8.2 +/-    3.19      17.5 +/-    3.19  0.070 / 0.110
G26     134.6          41.8                9.4 +/-    1.20      13.2 +/-    1.20  0.040 / 0.030
G31     39.5           54.8                7.3 +/-    0.87       8.7 +/-    0.87  0.030 / 0.030
G32     81.2           21.5                7.5 +/-    1.07      15.9 +/-    1.07  0.050 / 0.090