PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-07:42:50
G01     264.4924       39.9639          4.1013 +/-  1.2919    5.9688 +/-  1.2919  0.060 / 0.090
G03     316.0819       31.0865          3.7356 +/-  1.7057    6.3971 +/-  1.7057  0.060 / 0.060
G10     132.1164       14.5354          3.9578 +/-  4.6263    9.9556 +/-  4.6263  0.060 / 0.080
G11     243.6015       19.0056          3.5443 +/-  2.2986    7.9908 +/-  2.2986  0.060 / 0.080
G14     49.9964        46.0496          2.2161 +/-  0.8961    2.9426 +/-  0.8961  0.160 / 0.260
G22     313.1008       57.1752          2.4230 +/-  1.4346    2.8244 +/-  1.4346  0.170 / 0.260
G25     45.1189        12.9164          1.2050 +/-  2.9620    3.1501 +/-  2.9620  0.050 / 0.060
G26     145.9684       28.0485          2.4945 +/-  3.2473    4.5534 +/-  3.2473  0.040 / 0.050
G31     47.5668        69.6937          2.6047 +/-  0.3381    2.7583 +/-  0.3381  0.080 / 0.050
G32     67.5528        30.2639          3.4270 +/-  1.6552    5.9686 +/-  1.6552  0.050 / 0.050