PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-09:13:10
G07     38.4           68.9                4.6 +/-    0.53       4.9 +/-    0.53  0.080 / 0.060
G08     55.1           42.8                3.3 +/-    1.06       4.5 +/-    1.06  0.040 / 0.050
G09     177.4          41.6                8.2 +/-    0.90      11.7 +/-    0.90  0.030 / 0.080
G11     123.0          30.6                5.8 +/-    0.97      10.0 +/-    0.97  0.030 / 0.040
G17     198.7          10.8               -6.4 +/-   15.71     -17.5 +/-   15.71  0.080 / 0.060
G23     161.1          15.3                7.0 +/-    4.74      17.3 +/-    4.74  0.060 / 0.070
G27     38.2           11.4                2.1 +/-    0.92       5.7 +/-    0.92  0.200 / 0.140
G28     267.4          49.6                4.8 +/-    2.14       6.1 +/-    2.14  0.120 / 0.300
G30     325.1          54.2                3.5 +/-    1.71       4.3 +/-    1.71  0.040 / 0.050