PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-03:42:40
G08     309.4173       19.3344          9.8059 +/-  1.7517   21.9302 +/-  1.7517  0.040 / 0.030
G10     327.1396       59.0437          7.6822 +/-  1.8066    8.7990 +/-  1.8066  0.030 / 0.040
G14     217.3566       31.2062         10.0213 +/-  3.0792   17.1196 +/-  3.0792  0.050 / 0.070
G15     46.4174        14.8394          3.5776 +/-  1.0071    8.9333 +/-  1.0071  0.070 / 0.080
G18     32.5610        61.1297          6.7102 +/-  0.4884    7.5470 +/-  0.4884  0.150 / 0.260
G21     132.1598       58.7861          8.5238 +/-  0.5978    9.7860 +/-  0.5978  0.100 / 0.200
G24     77.2970        30.5862          6.6659 +/-  0.6499   11.5326 +/-  0.6499  0.080 / 0.110
G27     274.8283       37.8000          9.2282 +/-  1.1822   13.9281 +/-  1.1822  0.070 / 0.120
G32     222.2598       50.2722         10.9987 +/-  1.0572   13.8249 +/-  1.0572  0.030 / 0.050