PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-09:27:40
G10     296.1          51.2                5.1 +/-    2.58       6.4 +/-    2.58  0.080 / 0.090
G15     46.1           27.8                3.5 +/-    1.44       6.4 +/-    1.44  0.090 / 0.090
G20     61.3           36.5                5.1 +/-    2.05       7.9 +/-    2.05  0.090 / 0.140
G21     95.5           73.9                6.1 +/-    0.55       6.3 +/-    0.55  0.090 / 0.110
G24     98.6           26.3                5.9 +/-    1.51      11.2 +/-    1.51  0.040 / 0.040
G27     300.4          34.4                5.1 +/-    2.45       8.2 +/-    2.45  0.040 / 0.040
G32     210.2          32.7                5.7 +/-    1.37       9.5 +/-    1.37  0.050 / 0.080