PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-04:43:10
G08     279.8          22.6                7.8 +/-    1.31      16.1 +/-    1.31  0.030 / 0.020
G10     30.0           62.9                4.5 +/-    0.65       5.0 +/-    0.65  0.030 / 0.020
G14     243.3          57.9                7.0 +/-    2.14       8.2 +/-    2.14  0.070 / 0.120
G18     75.3           46.7                5.5 +/-    1.11       7.2 +/-    1.11  0.080 / 0.100
G21     150.7          29.4                8.6 +/-    1.46      15.3 +/-    1.46  0.090 / 0.140
G24     48.1           20.9                6.8 +/-    2.38      14.7 +/-    2.38  0.150 / 0.090
G27     241.7          24.8                8.6 +/-    2.06      16.9 +/-    2.06  0.030 / 0.010
G31     181.0          16.6               11.0 +/-    1.41      26.3 +/-    1.41  0.030 / 0.010
G32     277.5          74.4                4.0 +/-    0.71       4.2 +/-    0.71  0.100 / 0.080