PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-19:12:50
G01     123.0          15.0               14.4 +/-    2.58      36.0 +/-    2.58  0.090 / 0.190
G07     66.7           68.7               12.2 +/-    0.29      13.0 +/-    0.29  0.090 / 0.210
G08     48.6           38.7                9.9 +/-    0.78      14.7 +/-    0.78  0.040 / 0.050
G09     178.0          31.2               12.7 +/-    1.68      21.7 +/-    1.68  0.040 / 0.060
G11     114.4          37.7               13.9 +/-    1.50      20.9 +/-    1.50  0.150 / 0.270
G13     319.7          15.4               10.4 +/-    2.18      25.7 +/-    2.18  0.160 / 0.310
G17     202.1          16.1               14.7 +/-    2.03      35.6 +/-    2.03  0.040 / 0.030
G18     99.5           18.9               12.6 +/-    1.45      28.4 +/-    1.45  0.030 / 0.030
G28     285.1          55.6               12.7 +/-    2.50      15.1 +/-    2.50  0.030 / 0.030
G30     342.3          65.9               11.3 +/-    0.79      12.2 +/-    0.79  0.030 / 0.030