PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-09:42:40
G07     357.1          64.5                6.2 +/-    0.72       6.8 +/-    0.72  0.040 / 0.090
G08     76.7           50.9                6.4 +/-    0.70       8.0 +/-    0.70  0.040 / 0.080
G09     178.9          59.3               11.2 +/-    0.69      12.8 +/-    0.69  0.020 / 0.030
G11     136.3          20.0                7.7 +/-    1.58      16.9 +/-    1.58  0.030 / 0.040
G23     159.0          31.9                6.0 +/-    0.96      10.1 +/-    0.96  0.070 / 0.060
G27     45.5           23.9                3.5 +/-    2.30       7.0 +/-    2.30  0.050 / 0.050
G28     247.7          38.5                8.1 +/-    1.22      12.0 +/-    1.22  0.040 / 0.040
G30     310.1          41.4                3.9 +/-    0.99       5.5 +/-    0.99  0.040 / 0.040