PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-23:57:50
G02     79.6089        18.7193          8.8018 +/-  1.3790   19.9840 +/-  1.3790  0.100 / 0.170
G05     44.5465        38.5139          7.7858 +/-  0.5996   11.6081 +/-  0.5996  0.100 / 0.150
G13     104.4913       32.1561         10.6935 +/-  1.1586   17.9231 +/-  1.1586  0.130 / 0.270
G15     150.4332       33.4674         11.7036 +/-  1.1928   19.1195 +/-  1.1928  0.160 / 0.200
G18     229.0379       22.8119         11.9237 +/-  1.6661   24.5181 +/-  1.6661  0.120 / 0.140
G20     334.3618       85.7512          8.8637 +/-  0.8160    8.8856 +/-  0.8160  0.090 / 0.160
G21     293.2746       33.4470          8.3220 +/-  1.4212   13.6006 +/-  1.4212  0.030 / 0.020
G25     206.9541       26.4093         12.0516 +/-  1.2019   22.8080 +/-  1.2019  0.020 / 0.020
G26     309.6913       16.5895         10.2915 +/-  3.2555   24.6233 +/-  3.2555  0.040 / 0.050
G29     5.2374         83.8662          8.9774 +/-  0.4548    9.0238 +/-  0.4548  0.040 / 0.060