PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-13:43:10
G08     315.4          15.1                1.8 +/-    2.18       4.5 +/-    2.18  0.050 / 0.050
G10     321.1          57.9                2.5 +/-    0.57       2.9 +/-    0.57  0.070 / 0.060
G14     215.8          24.6                5.5 +/-    3.45      10.9 +/-    3.45  0.200 / 0.270
G15     46.0           13.7                2.9 +/-    1.48       7.4 +/-    1.48  0.140 / 0.220
G20     80.6           12.9                2.8 +/-    2.23       7.4 +/-    2.23  0.030 / 0.040
G21     128.6          59.3                6.0 +/-    0.58       6.8 +/-    0.58  0.030 / 0.040
G24     81.1           30.3                4.0 +/-    1.38       6.9 +/-    1.38  0.210 / 0.400
G27     280.6          38.0                5.5 +/-    2.05       8.3 +/-    2.05  0.160 / 0.350
G32     219.1          47.5                6.4 +/-    1.44       8.3 +/-    1.44  0.030 / 0.040