PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-11:42:40
G10     268.2          38.5                4.4 +/-    1.83       6.6 +/-    1.83  0.240 / 0.240
G13     41.6           18.0                3.1 +/-    2.45       7.1 +/-    2.45  0.180 / 0.210
G15     56.8           46.3                2.7 +/-    1.46       3.6 +/-    1.46  0.040 / 0.030
G16     279.4          11.3                4.0 +/-    5.50      10.9 +/-    5.50  0.030 / 0.040
G20     52.3           39.1                3.4 +/-    2.49       5.0 +/-    2.49  0.060 / 0.080
G21     13.7           73.5                4.3 +/-    0.49       4.4 +/-    0.49  0.070 / 0.080
G24     120.0          14.8                6.7 +/-    2.25      16.7 +/-    2.25  0.490 / 0.460
G27     317.5          20.7                3.4 +/-    2.80       7.4 +/-    2.80  0.270 / 0.280
G29     167.4          28.3                5.7 +/-    1.17      10.3 +/-    1.17  0.090 / 0.060
G32     204.5          10.9              -12.5 +/-   21.10     -34.2 +/-   21.10  0.060 / 0.060