PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-16:57:30
G01     128.8          10.3               -5.3 +/-   40.36     -14.7 +/-   40.36  0.050 / 0.040
G07     44.5           69.9               12.5 +/-    0.51      13.2 +/-    0.51  0.050 / 0.040
G08     53.4           43.1               11.6 +/-    0.98      16.1 +/-    0.98  0.030 / 0.030
G09     178.4          38.4               13.8 +/-    1.13      20.6 +/-    1.13  0.030 / 0.030
G11     121.6          33.8               14.7 +/-    1.25      23.8 +/-    1.25  0.030 / 0.050
G18     106.2          15.5               13.2 +/-    1.61      32.4 +/-    1.61  0.030 / 0.030
G28     273.1          51.8               14.6 +/-    2.54      18.0 +/-    2.54  0.320 / 0.360
G30     331.2          59.2               11.5 +/-    0.67      13.1 +/-    0.67  0.170 / 0.310