PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-09:28:10
G03     217.9          58.8                6.1 +/-    0.83       7.0 +/-    0.83  0.100 / 0.300
G07     258.3          18.3                3.9 +/-    1.65       9.0 +/-    1.65  0.090 / 0.330
G09     311.4          30.7                4.1 +/-    2.51       7.0 +/-    2.51  0.200 / 0.350
G16     97.1           65.4                3.5 +/-    6.16       3.8 +/-    6.16  0.180 / 0.300
G22     187.2          41.2                6.6 +/-    5.48       9.4 +/-    5.48  0.040 / 0.080
G23     328.9          58.8                5.9 +/-    7.93       6.7 +/-    7.93  0.060 / 0.060
G26     54.2           44.5              -17.0 +/-   59.01     -23.1 +/-   59.01  0.030 / 0.050
G27     132.5          11.4                1.1 +/-   23.41       3.1 +/-   23.41  0.030 / 0.050
G31     59.3           10.4                3.4 +/-    9.95       9.3 +/-    9.95  0.030 / 0.050