PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-07:13:00
G01     225.3          16.3                6.1 +/-    2.08      14.6 +/-    2.08  0.040 / 0.040
G03     288.6          66.1                3.9 +/-    1.22       4.2 +/-    1.22  0.040 / 0.040
G09     295.6          10.9               -5.6 +/-   26.38     -15.4 +/-   26.38  0.120 / 0.250
G14     88.4           22.0                2.7 +/-    1.29       5.7 +/-    1.29  0.110 / 0.220
G16     148.3          45.5                8.4 +/-    1.01      11.3 +/-    1.01  0.060 / 0.100
G22     212.9          70.1                6.7 +/-    1.22       7.1 +/-    1.22  0.060 / 0.100
G23     307.1          36.6                3.0 +/-    1.05       4.7 +/-    1.05  0.090 / 0.320
G26     99.2           55.0                6.2 +/-    0.59       7.4 +/-    0.59  0.110 / 0.310
G31     45.1           32.3                2.8 +/-    0.61       4.7 +/-    0.61  0.030 / 0.080