PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/15-18:12:50
G08     264.6          18.1                8.3 +/-    1.72      19.0 +/-    1.72  0.200 / 0.300
G10     63.0           57.6                8.6 +/-    1.61      10.0 +/-    1.61  0.160 / 0.270
G11     310.3          18.6                7.9 +/-    2.40      18.0 +/-    2.40  0.030 / 0.030
G14     268.9          67.2                8.0 +/-    0.99       8.6 +/-    0.99  0.030 / 0.030
G18     310.8          35.3                6.9 +/-    1.38      10.9 +/-    1.38  0.100 / 0.210
G20     96.1           36.1                7.1 +/-    1.02      11.0 +/-    1.02  0.120 / 0.200
G21     154.1          11.9                7.9 +/-    3.37      21.0 +/-    3.37  0.060 / 0.040
G27     233.7          16.2                8.5 +/-    3.51      20.5 +/-    3.51  0.060 / 0.040
G31     180.8          27.9                8.8 +/-    1.68      16.1 +/-    1.68  0.280 / 0.210
G32     337.2          74.1                7.8 +/-    0.33       8.1 +/-    0.33  0.240 / 0.190