PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-13:12:30
G08     84.9971        51.5183          6.3774 +/-  0.5303    7.8977 +/-  0.5303  0.060 / 0.090
G09     181.8630       65.6990          5.9327 +/-  0.6476    6.4432 +/-  0.6476  0.060 / 0.090
G11     138.8017       16.9469          7.8068 +/-  1.9938   18.5151 +/-  1.9938  0.050 / 0.080
G23     157.5770       36.5563          6.9530 +/-  1.0591   10.7260 +/-  1.0591  0.050 / 0.080
G27     49.0410        27.1757          5.0276 +/-  0.7363    9.3543 +/-  0.7363  0.030 / 0.040
G28     242.8536       34.4464          6.5777 +/-  1.7248   10.5473 +/-  1.7248  0.020 / 0.030
G30     305.4297       37.0794          5.2957 +/-  1.3744    8.0940 +/-  1.3744  0.080 / 0.230