PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/18-23:57:40
G02     78.1271        19.9020          9.6646 +/-  1.1335   21.3161 +/-  1.1335  0.080 / 0.150
G05     44.6064        40.1906          9.7008 +/-  1.3469   14.0658 +/-  1.3469  0.120 / 0.180
G13     106.5168       31.2395         13.0386 +/-  1.5152   22.2591 +/-  1.5152  0.080 / 0.180
G15     151.7292       31.8049         14.5319 +/-  0.7256   24.5275 +/-  0.7256  0.070 / 0.140
G18     228.0077       21.2192         12.9561 +/-  2.1857   27.6761 +/-  2.1857  0.040 / 0.060
G20     306.1790       86.5331         10.6549 +/-  0.6051   10.6725 +/-  0.6051  0.040 / 0.060
G21     291.7036       32.3306         10.2265 +/-  1.4167   17.0812 +/-  1.4167  0.100 / 0.160
G25     208.0389       28.0877         13.1202 +/-  1.7570   23.9292 +/-  1.7570  0.090 / 0.150
G26     311.2143       15.8905          8.0979 +/-  0.7726   19.7099 +/-  0.7726  0.130 / 0.430
G29     357.3512       81.9872         11.6345 +/-  0.3024   11.7374 +/-  0.3024  0.120 / 0.390