PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-04:27:50
G01     231.4          21.9                7.5 +/-    2.01      15.9 +/-    2.01  0.090 / 0.110
G03     302.9          60.6                5.7 +/-    1.03       6.5 +/-    1.03  0.080 / 0.120
G14     81.3           27.1                3.5 +/-    1.87       6.5 +/-    1.87  0.030 / 0.030
G16     155.6          36.5                6.1 +/-    1.21       9.4 +/-    1.21  0.030 / 0.030
G22     241.9          75.0                5.7 +/-    0.38       5.9 +/-    0.38  0.310 / 0.160
G23     301.2          31.0                4.9 +/-    0.95       8.4 +/-    0.95  0.120 / 0.240
G26     116.3          52.1                6.5 +/-    0.85       7.9 +/-    0.85  0.060 / 0.110
G31     41.8           41.0                3.0 +/-    0.99       4.2 +/-    0.99  0.060 / 0.090
G32     93.1           12.8                5.6 +/-    2.59      14.6 +/-    2.59  0.070 / 0.120