PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/18-23:43:10
G02     73.1058        23.7875          9.7454 +/-  1.3985   19.5841 +/-  1.3985  0.070 / 0.110
G05     45.5156        46.1986         10.1182 +/-  0.7873   13.4076 +/-  0.7873  0.070 / 0.120
G12     180.0743       12.3413         16.3433 +/-  1.9489   43.2963 +/-  1.9489  0.070 / 0.180
G13     113.0492       27.7383         13.5735 +/-  0.7843   24.9446 +/-  0.7843  0.070 / 0.190
G15     155.6348       26.2536         14.1925 +/-  2.7986   26.9534 +/-  2.7986  0.040 / 0.060
G18     224.8199       15.8400         13.0109 +/- 12.1515   31.7070 +/- 12.1515  0.030 / 0.070
G20     233.4549       82.7407         12.1024 +/-  0.6014   12.1902 +/-  0.6014  0.070 / 0.160
G21     286.4172       28.5819          8.6441 +/-  1.7451   15.5984 +/-  1.7451  0.070 / 0.170
G25     211.8774       33.8142         13.6356 +/-  1.9288   22.1281 +/-  1.9288  0.050 / 0.340
G29     344.9912       75.3887         11.2653 +/-  0.4841   11.6019 +/-  0.4841  0.060 / 0.280