PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/21-22:28:00
G08     278.3          22.0               15.0 +/-    1.13      31.4 +/-    1.13  0.100 / 0.230
G10     34.9           62.5               13.4 +/-    0.55      14.9 +/-    0.55  0.080 / 0.270
G14     245.8          58.9               15.7 +/-    0.91      18.1 +/-    0.91  0.070 / 0.250
G18     79.7           43.3               13.8 +/-    0.90      19.1 +/-    0.90  0.090 / 0.260
G21     150.8          24.5               16.1 +/-    1.40      31.7 +/-    1.40  0.060 / 0.150
G24     46.7           19.6               11.1 +/-    1.29      24.7 +/-    1.29  0.060 / 0.140
G27     240.1          23.5               14.8 +/-    1.85      29.9 +/-    1.85  0.040 / 0.060
G31     183.4          15.1               19.0 +/-    2.05      47.1 +/-    2.05  0.040 / 0.060
G32     278.5          73.5               14.7 +/-    0.66      15.3 +/-    0.66  0.170 / 0.270