PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-18:58:10
G08     267.0          17.7                9.3 +/-    2.51      21.7 +/-    2.51  0.110 / 0.190
G10     61.6           58.6                9.7 +/-    0.84      11.1 +/-    0.84  0.110 / 0.200
G11     311.6          17.0                9.9 +/-    2.10      23.4 +/-    2.10  0.210 / 0.620
G14     268.9          66.6                8.3 +/-    0.92       9.0 +/-    0.92  0.190 / 0.430
G18     93.5           34.3               11.7 +/-    1.08      18.9 +/-    1.08  0.150 / 0.310
G21     153.1          9.8                15.0 +/-    5.47      42.1 +/-    5.47  0.130 / 0.370
G24     39.9           10.6                9.7 +/-    2.29      26.6 +/-    2.29  0.050 / 0.120
G27     230.2          15.0               10.7 +/-    1.70      26.6 +/-    1.70  0.080 / 0.110
G31     179.4          29.7               14.2 +/-    1.59      25.0 +/-    1.59  0.030 / 0.030
G32     337.9          73.9               10.6 +/-    0.40      11.0 +/-    0.40  0.020 / 0.030