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                7.3 +/-    1.03      15.1 +/-    1.03  0.030 / 0.010
G10     30.0           62.9                5.0 +/-    0.94       5.5 +/-    0.94  0.040 / 0.010
G14     243.3          57.9                7.0 +/-    1.67       8.1 +/-    1.67  0.080 / 0.080
G18     75.3           46.7                5.3 +/-    0.89       7.0 +/-    0.89  0.090 / 0.060
G21     150.7          29.4                7.7 +/-    1.72      13.7 +/-    1.72  0.080 / 0.140
G24     48.1           20.9                4.2 +/-    0.67       9.1 +/-    0.67  0.070 / 0.160
G27     241.7          24.8                9.1 +/-    2.47      17.9 +/-    2.47  0.040 / 0.020
G31     181.0          16.6               12.7 +/-    6.30      30.3 +/-    6.30  0.030 / 0.010
G32     277.5          74.4                4.8 +/-    0.76       5.0 +/-    0.76  0.080 / 0.070