PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-03:12:40
G08     319.3625       12.3362          7.0415 +/-  1.5196   18.6564 +/-  1.5196  0.040 / 0.060
G10     304.2506       53.5431          8.6343 +/-  0.9546   10.4497 +/-  0.9546  0.040 / 0.040
G14     211.6043       18.4832          9.5233 +/-  0.9758   21.7481 +/-  0.9758  0.070 / 0.070
G15     45.8207        26.4890          5.9714 +/-  0.9397   11.2809 +/-  0.9397  0.050 / 0.090
G18     5.5203         65.3243          8.2218 +/-  0.7124    8.9527 +/-  0.7124  0.110 / 0.330
G20     75.7646        13.1665          5.4792 +/-  1.1320   14.2396 +/-  1.1320  0.180 / 0.320
G21     110.4403       70.6955          9.4835 +/-  0.8174    9.9865 +/-  0.8174  0.080 / 0.130
G24     93.1283        28.3749          8.7493 +/-  1.3529   15.8586 +/-  1.3529  0.060 / 0.110
G27     292.4362       36.9124         10.3475 +/-  1.1136   15.8619 +/-  1.1136  0.030 / 0.040
G32     213.4181       36.8639         11.2361 +/-  1.6708   17.2389 +/-  1.6708  0.030 / 0.040