PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-11:58:10
G03     188.9537       13.6141          3.4814 +/-  1.5887    8.9525 +/-  1.5887  0.030 / 0.020
G07     304.2146       46.0707          3.8517 +/-  2.2721    5.1129 +/-  2.2721  0.030 / 0.020
G08     130.4153       37.1591          4.6770 +/-  0.7315    7.1383 +/-  0.7315  0.120 / 0.070
G09     314.5665       75.5691          3.3393 +/-  0.7204    3.4365 +/-  0.7204  0.100 / 0.100
G16     41.4861        30.0519          3.0907 +/-  1.5982    5.4065 +/-  1.5982  0.030 / 0.030
G23     137.7441       70.8213          3.8772 +/-  0.5738    4.0801 +/-  0.5738  0.030 / 0.030
G27     84.7760        36.3849          4.4753 +/-  0.6676    6.9250 +/-  0.6676  0.050 / 0.070
G30     280.4500       16.8049          4.3907 +/-  2.6232   10.4498 +/-  2.6232  0.040 / 0.060