PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-04:27:50
G08     273.8          20.4                8.8 +/-    2.24      19.3 +/-    2.24  0.210 / 0.400
G10     48.6           60.6                8.0 +/-    0.81       9.1 +/-    0.81  0.260 / 0.230
G14     251.8          59.5                7.9 +/-    1.08       9.0 +/-    1.08  0.120 / 0.160
G18     315.2          26.0                6.7 +/-    1.28      12.8 +/-    1.28  0.120 / 0.170
G20     77.9           53.2                8.6 +/-    1.16      10.4 +/-    1.16  0.040 / 0.040
G21     153.7          22.5                9.2 +/-    2.13      19.1 +/-    2.13  0.040 / 0.060
G24     42.1           13.7                5.2 +/-    4.12      13.5 +/-    4.12  0.140 / 0.460
G27     236.9          20.3               11.0 +/-    2.25      24.0 +/-    2.25  0.100 / 0.520
G31     178.1          25.5                7.5 +/-    2.46      14.6 +/-    2.46  0.160 / 0.300
G32     321.1          76.4                7.4 +/-    0.47       7.6 +/-    0.47  0.210 / 0.290