PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-14:42:50
G10     262.4          34.8                7.2 +/-    1.77      11.4 +/-    1.77  0.160 / 0.200
G13     44.6           22.5                4.1 +/-    2.35       8.5 +/-    2.35  0.160 / 0.220
G15     62.9           50.4                7.9 +/-    0.67       9.9 +/-    0.67  0.230 / 0.310
G16     286.6          12.5                6.1 +/-    2.20      16.2 +/-    2.20  0.260 / 0.320
G18     295.8          64.3                7.3 +/-    0.61       8.0 +/-    0.61  0.060 / 0.070
G20     49.6           41.3                6.1 +/-    0.85       8.6 +/-    0.85  0.050 / 0.070
G21     5.9            71.3                5.2 +/-    0.43       5.5 +/-    0.43  0.250 / 0.450
G24     124.8          11.4                1.5 +/-   32.04       3.9 +/-   32.04  0.230 / 0.450
G27     319.8          16.6                5.2 +/-    2.88      12.4 +/-    2.88  0.120 / 0.200
G29     165.9          32.4                9.1 +/-    0.91      15.2 +/-    0.91  0.160 / 0.250