PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/22-20:58:10
G10     274.9          42.7                8.4 +/-    1.73      11.7 +/-    1.73  0.080 / 0.040
G13     39.1           12.6                6.5 +/-    2.80      17.0 +/-    2.80  0.050 / 0.040
G15     55.7           48.0                8.7 +/-    0.86      11.2 +/-    0.86  0.060 / 0.200
G20     311.8          63.0                7.4 +/-    1.03       8.2 +/-    1.03  0.120 / 0.160
G21     24.5           75.6                9.0 +/-    0.35       9.3 +/-    0.35  0.100 / 0.190
G24     111.8          18.4               11.0 +/-    1.82      25.2 +/-    1.82  0.110 / 0.180
G27     315.6          23.2                7.3 +/-    1.18      14.8 +/-    1.18  0.080 / 0.340
G29     168.5          24.4               10.9 +/-    1.15      21.7 +/-    1.15  0.120 / 0.240
G32     205.1          16.4               13.0 +/-    3.11      31.3 +/-    3.11  0.040 / 0.040