PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-04:27:40
G08     273.8          21.2                7.8 +/-    2.16      16.6 +/-    2.16  0.040 / 0.020
G10     42.6           61.8                3.3 +/-    0.92       3.6 +/-    0.92  0.030 / 0.020
G11     314.9          13.8                5.4 +/-    1.99      13.9 +/-    1.99  0.050 / 0.030
G14     252.3          62.3                7.6 +/-    0.77       8.4 +/-    0.77  0.040 / 0.030
G18     82.0           43.1                5.4 +/-    1.20       7.4 +/-    1.20  0.120 / 0.200
G21     152.5          23.6                8.5 +/-    1.61      17.2 +/-    1.61  0.080 / 0.160
G24     44.4           17.3                4.9 +/-    2.59      11.5 +/-    2.59  0.240 / 0.200
G27     236.9          21.0                6.7 +/-    1.96      14.3 +/-    1.96  0.080 / 0.140
G31     179.9          21.9                9.2 +/-    1.67      19.2 +/-    1.67  0.070 / 0.040
G32     300.6          75.8                6.8 +/-    0.51       7.0 +/-    0.51  0.060 / 0.050