PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/18-23:27:50
G02     67.3075        28.2914          8.4567 +/-  0.6559   15.3558 +/-  0.6559  0.050 / 0.080
G05     48.3742        53.1041          8.9824 +/-  0.5049   10.9240 +/-  0.5049  0.060 / 0.070
G12     181.6866       18.9948         14.6280 +/-  1.2096   32.9881 +/-  1.2096  0.070 / 0.140
G13     119.7372       23.2508         13.0506 +/-  1.5346   26.5585 +/-  1.5346  0.070 / 0.170
G15     159.6623       20.1010         14.8962 +/-  1.1369   32.6957 +/-  1.1369  0.030 / 0.040
G20     216.2680       75.1944         12.4731 +/-  0.6389   12.8559 +/-  0.6389  0.030 / 0.040
G21     280.4862       24.3202         11.0369 +/-  1.2035   21.9060 +/-  1.2035  0.060 / 0.130
G25     217.1027       40.3793         13.7807 +/-  1.3526   19.9205 +/-  1.3526  0.080 / 0.130
G29     337.8770       67.9248         11.0515 +/-  1.0339   11.8275 +/-  1.0339  0.120 / 0.260