PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-17:27:40
G08     317.0          14.3                7.5 +/-    0.85      18.9 +/-    0.85  0.050 / 0.090
G10     313.7          56.2                7.7 +/-    0.68       9.1 +/-    0.68  0.060 / 0.100
G14     213.8          22.1               14.7 +/-    1.25      30.7 +/-    1.25  0.030 / 0.050
G15     45.6           17.4                8.6 +/-    0.50      20.2 +/-    0.50  0.030 / 0.050
G18     25.2           62.3                9.7 +/-    0.91      10.8 +/-    0.91  0.060 / 0.140
G20     78.4           13.3                9.9 +/-    1.00      25.5 +/-    1.00  0.060 / 0.120
G21     123.9          60.1               14.6 +/-    1.05      16.6 +/-    1.05  0.110 / 0.260
G24     86.5           29.8               10.9 +/-    0.72      19.1 +/-    0.72  0.120 / 0.290
G27     285.8          37.9               10.0 +/-    1.36      15.1 +/-    1.36  0.040 / 0.060
G32     216.6          41.9               12.1 +/-    1.03      17.2 +/-    1.03  0.040 / 0.060