PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-09:27:50
G01     87.0           32.3                6.4 +/-    0.66      10.6 +/-    0.66  0.040 / 0.050
G07     127.9          41.7                8.0 +/-    0.92      11.3 +/-    0.92  0.040 / 0.050
G11     65.3           37.4                3.6 +/-    0.39       5.4 +/-    0.39  0.110 / 0.320
G13     293.5          35.6                3.8 +/-    1.22       6.0 +/-    1.22  0.150 / 0.380
G15     314.0          10.9               -2.8 +/-   13.61      -7.7 +/-   13.61  0.050 / 0.040
G17     216.4          58.4                7.0 +/-    0.55       8.0 +/-    0.55  0.040 / 0.050
G19     215.7          31.1                6.0 +/-    1.55      10.3 +/-    1.55  0.050 / 0.060
G28     355.4          61.4                3.9 +/-    0.77       4.3 +/-    0.77  0.050 / 0.070
G30     110.0          74.5                5.9 +/-    0.55       6.1 +/-    0.55  0.090 / 0.100