PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-19:57:50
G02     283.7          79.8                8.7 +/-    0.84       8.9 +/-    0.84  0.030 / 0.030
G05     169.7          25.3               13.5 +/-    1.67      26.2 +/-    1.67  0.030 / 0.030
G06     40.8           45.6                7.4 +/-    0.70       9.9 +/-    0.70  0.020 / 0.030
G12     317.9          66.6                7.4 +/-    0.54       8.0 +/-    0.54  0.030 / 0.040
G17     82.8           12.5                9.3 +/-    1.13      24.6 +/-    1.13  0.130 / 0.120
G19     71.0           29.1                8.7 +/-    2.25      15.5 +/-    2.25  0.180 / 0.150
G25     317.6          28.0                6.4 +/-    1.54      11.7 +/-    1.54  0.080 / 0.120