PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/25-11:42:50
G01     66.5           32.1                4.4 +/-    1.18       7.4 +/-    1.18  0.040 / 0.030
G07     139.3          25.7                5.6 +/-    0.83      10.7 +/-    0.83  0.040 / 0.040
G11     50.8           26.4                3.5 +/-    0.71       6.6 +/-    0.71  0.040 / 0.110
G13     272.3          36.3                8.1 +/-    1.41      12.6 +/-    1.41  0.040 / 0.110
G15     300.5          15.6                3.4 +/-    2.06       8.4 +/-    2.06  0.040 / 0.030
G17     244.1          74.7                6.5 +/-    0.55       6.7 +/-    0.55  0.030 / 0.030
G19     227.4          47.3                8.3 +/-    0.74      10.9 +/-    0.74  0.050 / 0.080
G28     26.6           58.1                3.7 +/-    0.55       4.2 +/-    0.55  0.050 / 0.080
G30     138.4          59.5                5.4 +/-    0.59       6.2 +/-    0.59  0.110 / 0.360