PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-11:57:30
G03     189.8551       15.5792          4.2822 +/-  3.2744   10.5023 +/-  3.2744  0.030 / 0.050
G07     301.6051       44.8121          4.5000 +/-  1.7870    6.0802 +/-  1.7870  0.030 / 0.040
G08     132.5620       35.3522          6.6917 +/-  0.6597   10.5508 +/-  0.6597  0.120 / 0.340
G09     317.3701       73.1490          3.2643 +/-  0.7388    3.3950 +/-  0.7388  0.220 / 0.350
G16     41.5235        32.1613          2.0405 +/-  1.0132    3.4197 +/-  1.0132  0.050 / 0.110
G23     134.0577       73.1936          4.5870 +/-  0.7335    4.7696 +/-  0.7335  0.050 / 0.120
G27     87.7865        36.0072          2.5388 +/-  1.0453    3.9554 +/-  1.0453  0.030 / 0.030
G30     278.6741       15.4132          3.9883 +/-  1.7126    9.8211 +/-  1.7126  0.030 / 0.040