PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/02-09:27:50
G08     278.6          20.1                5.5 +/-    2.07      12.1 +/-    2.07  0.050 / 0.070
G10     45.5           61.2                4.0 +/-    0.37       4.5 +/-    0.37  0.040 / 0.080
G14     248.8          56.9                7.4 +/-    0.97       8.7 +/-    0.97  0.060 / 0.150
G18     315.8          24.2                3.3 +/-    2.29       6.5 +/-    2.29  0.080 / 0.150
G20     99.6           15.8                5.0 +/-    1.66      12.1 +/-    1.66  0.090 / 0.330
G21     153.1          22.9                5.3 +/-    2.65      10.9 +/-    2.65  0.080 / 0.250
G24     43.3           15.5                4.0 +/-    1.08       9.9 +/-    1.08  0.030 / 0.030
G27     237.4          20.9                6.7 +/-    1.19      14.4 +/-    1.19  0.030 / 0.030
G31     178.5          24.2                3.8 +/-    1.11       7.6 +/-    1.11  0.100 / 0.280
G32     314.5          76.6                6.7 +/-    0.81       6.9 +/-    0.81  0.110 / 0.320