PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-00:27:50
G02     90.0869        10.4662          9.4299 +/-  1.5969   26.0448 +/-  1.5969  0.120 / 0.240
G05     46.1878        26.2834          8.2256 +/-  2.2936   15.6111 +/-  2.2936  0.110 / 0.200
G13     87.9207        36.8143          9.3657 +/-  0.5484   14.3818 +/-  0.5484  0.150 / 0.220
G15     139.0084       45.2653         12.2666 +/-  0.7109   16.4673 +/-  0.7109  0.140 / 0.290
G18     238.0612       34.0767         11.7114 +/-  0.9857   18.9108 +/-  0.9857  0.130 / 0.170
G20     22.4282        72.9122          8.8406 +/-  0.4549    9.2049 +/-  0.4549  0.180 / 0.240
G21     305.0046       41.6982         10.4914 +/-  1.3571   14.8511 +/-  1.3571  0.020 / 0.020
G25     199.9976       14.7945         14.7490 +/-  1.8479   36.8691 +/-  1.8479  0.020 / 0.020
G26     297.0619       19.8855          9.3794 +/-  1.5908   20.6955 +/-  1.5908  0.110 / 0.140
G29     145.2773       79.6718         10.4729 +/-  0.6224   10.6275 +/-  0.6224  0.130 / 0.120