PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-01:28:00
G02     357.6          76.3                8.7 +/-    0.46       8.9 +/-    0.46  0.030 / 0.030
G05     161.7          37.1               14.1 +/-    1.14      21.6 +/-    1.14  0.030 / 0.030
G06     42.4           37.6                7.7 +/-    0.78      11.7 +/-    0.78  0.040 / 0.050
G12     306.5          73.6               11.9 +/-    0.39      12.3 +/-    0.39  0.040 / 0.050
G17     86.7           13.4               11.0 +/-    1.99      28.5 +/-    1.99  0.100 / 0.120
G19     76.9           26.6                9.3 +/-    1.26      17.6 +/-    1.26  0.120 / 0.120
G24     226.4          20.9               14.4 +/-    2.21      30.9 +/-    2.21  0.050 / 0.050
G25     316.9          30.4                9.1 +/-    1.08      15.7 +/-    1.08  0.050 / 0.050