PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-12:12:40
G03     187.1418       9.8926           2.6436 +/-  8.7498    7.3903 +/-  8.7498  0.030 / 0.040
G07     309.5470       48.5740          5.3221 +/-  1.6327    6.8332 +/-  1.6327  0.040 / 0.040
G08     125.8367       40.5316          5.4977 +/-  0.4477    7.9275 +/-  0.4477  0.160 / 0.170
G09     304.1060       79.9104          3.6229 +/-  0.7181    3.6740 +/-  0.7181  0.090 / 0.200
G16     41.7210        25.9194          4.6047 +/-  1.1618    8.8110 +/-  1.1618  0.090 / 0.150
G23     143.1206       66.0300          5.4308 +/-  0.4731    5.8847 +/-  0.4731  0.070 / 0.130
G27     78.8713        36.6920          4.0616 +/-  0.9288    6.2505 +/-  0.9288  0.040 / 0.030
G28     223.8110       12.0725          2.8377 +/-  5.4179    7.5639 +/-  5.4179  0.030 / 0.030
G30     283.9130       19.5099          2.5244 +/-  1.9147    5.6214 +/-  1.9147  0.030 / 0.070