PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-08:57:50
G07     35.3           69.4                5.5 +/-    0.45       5.9 +/-    0.45  0.040 / 0.050
G08     54.7           42.6                4.6 +/-    1.25       6.4 +/-    1.25  0.050 / 0.040
G09     174.9          38.4                7.8 +/-    0.49      11.7 +/-    0.49  0.030 / 0.030
G11     123.4          31.8                6.4 +/-    1.04      10.7 +/-    1.04  0.030 / 0.040
G17     198.7          10.1               -8.7 +/-   11.00     -24.3 +/-   11.00  0.070 / 0.120
G18     108.2          13.5                4.6 +/-    2.57      12.0 +/-    2.57  0.070 / 0.110
G23     160.9          14.4                5.1 +/-    1.45      12.9 +/-    1.45  0.080 / 0.290
G27     38.7           13.3                1.8 +/-    1.65       4.6 +/-    1.65  0.090 / 0.260
G28     266.0          48.6                5.0 +/-    1.27       6.4 +/-    1.27  0.150 / 0.380
G30     324.4          54.1                5.3 +/-    0.42       6.3 +/-    0.42  0.170 / 0.380