PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-20:28:00
G02     285.1072       79.6765         11.1032 +/-  0.9834   11.2669 +/-  0.9834  0.090 / 0.170
G05     169.1228       26.1509         12.8526 +/-  2.0868   24.4653 +/-  2.0868  0.090 / 0.140
G06     40.9034        44.8374          8.7350 +/-  0.5640   11.7980 +/-  0.5640  0.060 / 0.130
G12     317.3536       67.5280          8.8538 +/-  1.2994    9.4993 +/-  1.2994  0.040 / 0.100
G17     83.2690        12.2060         11.6038 +/-  2.5086   30.8360 +/-  2.5086  0.110 / 0.310
G19     71.6157        28.7248         10.2211 +/-  0.7832   18.3876 +/-  0.7832  0.110 / 0.310
G24     234.4267       27.0744         12.7805 +/-  1.9680   23.8322 +/-  1.9680  0.030 / 0.050
G25     317.6056       28.1683          9.5160 +/-  1.7594   17.3255 +/-  1.7594  0.030 / 0.040