PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/10-18:27:40
G02     39.9           50.0               14.0 +/-    0.90      17.7 +/-    0.90  0.040 / 0.050
G05     134.0          67.4               15.0 +/-    0.67      16.2 +/-    0.67  0.040 / 0.040
G06     58.7           10.3               13.2 +/-    1.42      36.7 +/-    1.42  0.040 / 0.040
G12     192.5          58.2               16.5 +/-    0.88      19.1 +/-    0.88  0.030 / 0.040
G20     199.4          35.6               15.8 +/-    1.32      24.8 +/-    1.32  0.030 / 0.030
G25     276.2          59.6               17.0 +/-    1.28      19.4 +/-    1.28  0.030 / 0.030
G29     315.1          37.7               14.4 +/-    1.02      21.8 +/-    1.02  0.070 / 0.110