PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-21:12:30
G02     35.0           54.3               11.7 +/-    0.45      14.1 +/-    0.45  0.040 / 0.040
G05     137.0          65.5               12.8 +/-    0.71      14.0 +/-    0.71  0.030 / 0.050
G06     57.3           11.4                8.9 +/-    1.30      23.9 +/-    1.30  0.070 / 0.100
G12     192.3          60.5               14.3 +/-    0.80      16.2 +/-    0.80  0.080 / 0.110
G20     198.4          33.3               14.6 +/-    2.10      23.9 +/-    2.10  0.050 / 0.050
G25     280.0          59.9               13.4 +/-    0.69      15.2 +/-    0.69  0.050 / 0.060
G29     312.0          33.7               10.8 +/-    1.17      17.5 +/-    1.17  0.040 / 0.040