PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/14-11:57:40
G07     21.2           67.7                3.5 +/-    0.45       3.7 +/-    0.45  0.050 / 0.040
G08     62.9           47.0                1.8 +/-    1.04       2.3 +/-    1.04  0.040 / 0.040
G09     177.2          48.6                5.3 +/-    0.75       6.8 +/-    0.75  0.080 / 0.110
G11     128.4          26.1                2.2 +/-    1.17       4.3 +/-    1.17  0.100 / 0.160
G23     160.4          22.3                4.1 +/-    1.20       8.6 +/-    1.20  0.040 / 0.040
G27     40.7           17.1                3.0 +/-    2.27       7.2 +/-    2.27  0.040 / 0.050
G28     257.9          44.8                5.2 +/-    3.77       7.0 +/-    3.77  0.030 / 0.030
G30     317.6          47.7                3.0 +/-    1.50       3.9 +/-    1.50  0.030 / 0.030