PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-21:13:10
G10     274.2          42.3               10.3 +/-    1.55      14.4 +/-    1.55  0.040 / 0.040
G13     39.3           13.1                7.2 +/-    1.97      18.6 +/-    1.97  0.040 / 0.040
G15     56.4           48.8                9.8 +/-    0.60      12.6 +/-    0.60  0.110 / 0.120
G20     310.5          62.8                9.5 +/-    1.03      10.5 +/-    1.03  0.060 / 0.200
G21     21.9           75.3               10.8 +/-    0.40      11.1 +/-    0.40  0.120 / 0.180
G24     112.4          18.1               12.5 +/-    2.01      28.9 +/-    2.01  0.100 / 0.190
G27     315.9          22.8                8.6 +/-    1.36      17.7 +/-    1.36  0.130 / 0.380
G29     168.5          25.1               10.6 +/-    0.84      20.7 +/-    0.84  0.200 / 0.490
G32     205.0          15.9               12.8 +/-    2.99      31.2 +/-    2.99  0.040 / 0.040