PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-09:57:50
G03     234.3680       65.6831          4.3982 +/-  0.5777    4.7772 +/-  0.5777  0.070 / 0.070
G07     251.4239       12.7939          3.4033 +/-  1.9888    8.9221 +/-  1.9888  0.050 / 0.060
G09     306.4958       23.1045          1.4733 +/-  1.2106    3.0085 +/-  1.2106  0.050 / 0.070
G14     103.8422       10.0206          2.6178 +/-  3.3936    7.2986 +/-  3.3936  0.040 / 0.060
G16     119.4127       62.1944          8.1490 +/-  0.7262    9.0855 +/-  0.7262  0.040 / 0.050
G22     190.2497       50.3345          5.5957 +/-  3.2673    7.0282 +/-  3.2673  0.030 / 0.040
G23     321.6576       51.3869          3.8179 +/-  1.2834    4.7354 +/-  1.2834  0.100 / 0.140
G26     64.0786        50.2924          4.1358 +/-  0.8539    5.1972 +/-  0.8539  0.110 / 0.140
G31     54.3433        16.3231          1.2412 +/-  1.3251    2.9892 +/-  1.3251  0.100 / 0.360