PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-04:42:50
G08     282.1951       22.9985          7.0661 +/-  1.1258   14.4656 +/-  1.1258  0.040 / 0.010
G10     24.7820        63.1163          4.4535 +/-  0.7971    4.9293 +/-  0.7971  0.030 / 0.010
G14     240.1575       55.9828          6.6193 +/-  1.0130    7.8075 +/-  1.0130  0.100 / 0.050
G18     72.5169        47.9955          3.5004 +/-  1.0602    4.5280 +/-  1.0602  0.090 / 0.050
G21     149.9249       31.6990          6.8833 +/-  0.4687   11.6426 +/-  0.4687  0.100 / 0.070
G24     49.7599        22.2505          3.9947 +/-  1.7574    8.3245 +/-  1.7574  0.090 / 0.060
G27     243.8327       26.2471          8.5922 +/-  2.0953   16.3201 +/-  2.0953  0.060 / 0.120
G31     181.5173       14.4680          7.3492 +/-  1.0533   18.5166 +/-  1.0533  0.060 / 0.120
G32     269.2709       73.3353          4.9304 +/-  0.5036    5.1233 +/-  0.5036  0.050 / 0.130