PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-16:27:50
G08     312.8          17.0                6.2 +/-    1.62      14.6 +/-    1.62  0.070 / 0.090
G10     324.5          58.6                6.8 +/-    0.65       7.9 +/-    0.65  0.060 / 0.100
G14     216.6          27.5                9.1 +/-    2.29      16.8 +/-    2.29  0.030 / 0.030
G15     46.3           12.1                6.1 +/-    1.06      16.3 +/-    1.06  0.030 / 0.030
G18     36.6           59.6                7.6 +/-    0.67       8.6 +/-    0.67  0.060 / 0.050
G20     82.6           10.1                8.5 +/-    3.60      23.6 +/-    3.60  0.050 / 0.060
G21     131.0          55.3                8.8 +/-    0.38      10.4 +/-    0.38  0.350 / 0.330
G24     79.1           30.5                6.6 +/-    1.29      11.4 +/-    1.29  0.250 / 0.360
G27     277.7          37.9                8.5 +/-    1.97      12.8 +/-    1.97  0.120 / 0.090
G32     220.7          48.5                9.3 +/-    2.00      11.9 +/-    2.00  0.070 / 0.080