PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/22-21:28:00
G10     291.7          50.0                8.3 +/-    3.16      10.4 +/-    3.16  0.040 / 0.030
G15     48.0           36.6                7.8 +/-    1.32      12.0 +/-    1.32  0.040 / 0.040
G20     342.4          65.4                8.2 +/-    0.55       8.9 +/-    0.55  0.110 / 0.090
G21     81.6           76.0                8.7 +/-    0.51       8.9 +/-    0.51  0.050 / 0.110
G24     99.0           24.7               10.7 +/-    1.05      21.0 +/-    1.05  0.080 / 0.150
G27     305.5          31.5                7.1 +/-    1.44      12.0 +/-    1.44  0.100 / 0.120
G29     168.5          11.7               13.7 +/-    1.28      36.9 +/-    1.28  0.050 / 0.060
G32     208.7          29.0               12.8 +/-    1.45      22.8 +/-    1.45  0.050 / 0.060