PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-19:58:10
G02     31.0           57.0                8.7 +/-    0.45      10.2 +/-    0.45  0.030 / 0.050
G05     139.4          62.2               10.9 +/-    1.08      12.1 +/-    1.08  0.040 / 0.040
G06     54.4           14.1                7.4 +/-    2.18      18.7 +/-    2.18  0.030 / 0.050
G12     191.0          65.1                7.9 +/-    1.11       8.6 +/-    1.11  0.030 / 0.050
G19     99.0           12.3                8.7 +/-    1.49      22.9 +/-    1.49  0.040 / 0.070
G25     296.3          54.0                8.6 +/-    0.72      10.4 +/-    0.72  0.030 / 0.050
G29     306.7          26.8                7.8 +/-    1.32      14.7 +/-    1.32  0.040 / 0.070