PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/24-17:42:40
G08     291.0          22.7                8.5 +/-    0.71      17.5 +/-    0.71  0.110 / 0.080
G10     11.8           63.2               11.6 +/-    0.38      12.9 +/-    0.38  0.070 / 0.120
G14     232.6          48.7               13.7 +/-    1.64      17.5 +/-    1.64  0.250 / 0.140
G18     68.7           48.2               11.5 +/-    1.22      14.8 +/-    1.22  0.160 / 0.130
G21     146.6          32.7               14.5 +/-    1.38      24.1 +/-    1.38  0.090 / 0.090
G24     54.6           25.2               12.2 +/-    3.24      23.8 +/-    3.24  0.090 / 0.110
G27     250.2          30.0               12.0 +/-    1.68      21.0 +/-    1.68  0.040 / 0.020
G32     251.4          69.1               11.7 +/-    0.43      12.5 +/-    0.43  0.040 / 0.020