PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/23-09:43:10
G01     68.9           32.6                4.7 +/-    0.62       7.8 +/-    0.62  0.030 / 0.040
G07     138.2          28.2                5.8 +/-    1.03      10.6 +/-    1.03  0.030 / 0.040
G11     52.5           28.5                2.3 +/-    1.83       4.1 +/-    1.83  0.110 / 0.390
G13     274.7          36.7                8.8 +/-    1.17      13.5 +/-    1.17  0.120 / 0.340
G15     301.6          15.6                1.9 +/-    3.59       4.7 +/-    3.59  0.040 / 0.050
G17     238.3          72.6                7.7 +/-    0.51       8.0 +/-    0.51  0.040 / 0.060
G19     225.6          45.2                9.7 +/-    1.52      13.1 +/-    1.52  0.060 / 0.130
G28     23.3           58.6                4.0 +/-    0.38       4.6 +/-    0.38  0.050 / 0.100
G30     136.4          60.7                8.6 +/-    0.65       9.7 +/-    0.65  0.040 / 0.080