PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-14:57:30
G03     210.5          57.7               11.5 +/-    1.06      13.3 +/-    1.06  0.040 / 0.050
G07     256.3          14.3               11.7 +/-    1.25      29.6 +/-    1.25  0.030 / 0.050
G09     309.8          27.0                7.4 +/-    2.16      13.7 +/-    2.16  0.100 / 0.110
G16     94.5           64.0                9.3 +/-    0.90      10.2 +/-    0.90  0.110 / 0.110
G22     183.9          38.5               11.2 +/-    2.23      16.8 +/-    2.23  0.030 / 0.060
G23     335.8          63.4                8.4 +/-    0.48       9.3 +/-    0.48  0.030 / 0.050
G26     53.2           42.3                9.1 +/-    0.49      12.8 +/-    0.49  0.080 / 0.230
G27     134.3          10.3              -12.8 +/-   27.07     -35.6 +/-   27.07  0.140 / 0.270