PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/18-16:58:10
G08     293.5          23.8                7.5 +/-    1.73      15.0 +/-    1.73  0.040 / 0.070
G10     4.3            62.8                7.9 +/-    1.01       8.8 +/-    1.01  0.050 / 0.080
G14     227.8          45.2                8.9 +/-    2.15      12.0 +/-    2.15  0.030 / 0.030
G18     317.4          10.9               -8.4 +/-   17.20     -23.1 +/-   17.20  0.040 / 0.030
G20     62.5           53.2                8.0 +/-    0.78       9.7 +/-    0.78  0.090 / 0.130
G21     144.9          39.1                9.0 +/-    1.26      13.3 +/-    1.26  0.100 / 0.130
G24     54.6           23.5                8.6 +/-    2.08      17.3 +/-    2.08  0.100 / 0.110
G27     259.7          32.7                6.6 +/-    2.47      10.9 +/-    2.47  0.140 / 0.110
G32     241.1          65.0                9.2 +/-    0.78      10.1 +/-    0.78  0.050 / 0.090