PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-09:12:30
G07     37.1           68.8                5.5 +/-    0.86       5.8 +/-    0.86  0.150 / 0.240
G08     55.5           43.1                5.9 +/-    1.13       8.1 +/-    1.13  0.120 / 0.290
G09     177.4          42.1                8.7 +/-    0.80      12.2 +/-    0.80  0.030 / 0.040
G11     123.4          30.3                9.3 +/-    2.04      16.2 +/-    2.04  0.060 / 0.040
G23     161.1          15.8                7.1 +/-    2.06      17.3 +/-    2.06  0.030 / 0.020
G27     38.3           11.8                2.8 +/-    2.22       7.6 +/-    2.22  0.040 / 0.030
G28     266.8          49.3                6.4 +/-    4.69       8.1 +/-    4.69  0.070 / 0.040
G30     324.6          53.8                5.1 +/-    0.51       6.1 +/-    0.51  0.040 / 0.040