PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-17:12:30
G08     291.9          22.6                8.5 +/-    1.64      17.6 +/-    1.64  0.150 / 0.090
G10     10.4           63.2                8.7 +/-    0.45       9.6 +/-    0.45  0.080 / 0.100
G14     232.0          48.0               10.1 +/-    1.67      13.1 +/-    1.67  0.170 / 0.160
G18     68.0           48.5                7.6 +/-    0.91       9.8 +/-    0.91  0.200 / 0.160
G21     146.4          33.7               11.5 +/-    0.90      18.8 +/-    0.90  0.040 / 0.020
G24     55.1           25.5                8.8 +/-    2.96      17.0 +/-    2.96  0.040 / 0.020
G27     250.9          30.4               10.0 +/-    1.87      17.4 +/-    1.87  0.090 / 0.120
G32     250.2          68.9                9.0 +/-    0.40       9.5 +/-    0.40  0.080 / 0.080