PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-07:27:50
G01     273.8217       41.3024          4.8086 +/-  1.3250    6.8492 +/-  1.3250  0.070 / 0.120
G03     314.9996       25.0798          3.5605 +/-  1.8459    6.9442 +/-  1.8459  0.110 / 0.110
G10     128.1490       20.1080          4.3107 +/-  1.0521    9.4601 +/-  1.0521  0.130 / 0.330
G11     249.7604       22.4019          4.6763 +/-  3.0257    9.7097 +/-  3.0257  0.100 / 0.310
G14     42.3406        50.1902          2.1142 +/-  0.4978    2.6601 +/-  0.4978  0.120 / 0.140
G22     314.6206       50.7594          3.4647 +/-  0.9680    4.3294 +/-  0.9680  0.100 / 0.170
G25     50.9824        15.3115          1.9875 +/-  1.5424    4.9063 +/-  1.5424  0.070 / 0.100
G26     150.2970       22.3352          4.7364 +/-  1.2680    9.8501 +/-  1.2680  0.060 / 0.100
G31     61.3296        76.0031          3.5807 +/-  0.8322    3.6787 +/-  0.8322  0.060 / 0.060
G32     61.5841        34.5618          2.2658 +/-  0.8863    3.6253 +/-  0.8863  0.050 / 0.070