PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/15-20:12:30
G02     38.2           51.6               11.4 +/-    0.92      14.1 +/-    0.92  0.040 / 0.060
G05     134.2          67.1               13.6 +/-    0.37      14.6 +/-    0.37  0.040 / 0.050
G06     58.6           10.1                9.5 +/-    1.29      26.4 +/-    1.29  0.040 / 0.040
G12     191.7          58.2               14.6 +/-    0.69      16.9 +/-    0.69  0.030 / 0.040
G20     199.0          35.5               15.3 +/-    1.29      24.0 +/-    1.29  0.040 / 0.050
G25     275.3          60.2               17.3 +/-    0.67      19.6 +/-    0.67  0.040 / 0.050
G29     314.0          36.1               11.6 +/-    1.23      18.1 +/-    1.23  0.030 / 0.030