PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/21-01:43:00
G10     257.5          31.1               13.6 +/-    2.53      23.4 +/-    2.53  0.130 / 0.130
G13     48.0           26.4               12.1 +/-    2.11      22.8 +/-    2.11  0.080 / 0.080
G15     75.9           56.8               12.4 +/-    0.51      14.5 +/-    0.51  0.030 / 0.090
G16     289.2          13.9               10.2 +/-    1.17      26.0 +/-    1.17  0.070 / 0.090
G18     279.9          59.1               13.0 +/-    0.63      14.9 +/-    0.63  0.050 / 0.050
G20     49.0           40.5               11.5 +/-    0.68      16.6 +/-    0.68  0.060 / 0.050
G21     343.7          65.6               10.9 +/-    0.72      11.9 +/-    0.72  0.130 / 0.330
G26     262.0          12.2               11.5 +/-    3.80      30.6 +/-    3.80  0.110 / 0.330
G27     321.2          12.9                8.4 +/-    1.57      22.0 +/-    1.57  0.160 / 0.180
G29     166.1          39.4               13.6 +/-    1.20      20.0 +/-    1.20  0.110 / 0.150