PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-13:43:10
G07     43.3           68.3               21.0 +/-   13.80      22.4 +/-   13.80  0.150 / 0.190
G08     54.9           42.5               -5.2 +/-   14.80      -7.3 +/-   14.80  0.130 / 0.270
G09     177.4          41.6                9.0 +/-    2.13      12.8 +/-    2.13  0.040 / 0.060
G11     121.4          30.5                4.3 +/-    3.35       7.4 +/-    3.35  0.040 / 0.050
G17     198.6          11.0               -3.6 +/-   19.09      -9.8 +/-   19.09  0.130 / 0.270
G23     160.9          14.9                7.4 +/-    3.30      18.4 +/-    3.30  0.130 / 0.270
G27     38.2           11.3               -0.1 +/-   16.37      -0.3 +/-   16.37  0.080 / 0.070
G28     267.2          49.2              -47.3 +/-   61.66     -60.2 +/-   61.66  0.060 / 0.060
G30     323.8          53.1                7.6 +/-    1.17       9.3 +/-    1.17  0.200 / 0.230