PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/17-18:58:00
G10     300.7          53.6                7.9 +/-    1.58       9.6 +/-    1.58  0.080 / 0.090
G15     45.8           26.0                9.0 +/-    2.39      17.1 +/-    2.39  0.070 / 0.090
G20     359.6          65.0                8.5 +/-    0.57       9.2 +/-    0.57  0.050 / 0.040
G21     97.8           73.9               10.4 +/-    0.83      10.8 +/-    0.83  0.040 / 0.040
G24     98.6           27.1               11.0 +/-    1.04      20.6 +/-    1.04  0.080 / 0.120
G27     299.9          34.8                8.9 +/-    1.56      14.2 +/-    1.56  0.070 / 0.110
G32     210.2          33.8               11.4 +/-    1.14      18.6 +/-    1.14  0.110 / 0.170