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               10.3 +/-    1.03      12.3 +/-    1.03  0.050 / 0.050
G05     137.0          65.5               12.1 +/-    0.76      13.2 +/-    0.76  0.050 / 0.070
G06     57.3           11.4                8.3 +/-    2.76      22.3 +/-    2.76  0.050 / 0.050
G12     192.3          60.5               12.9 +/-    0.68      14.6 +/-    0.68  0.040 / 0.050
G20     198.4          33.3               14.2 +/-    1.54      23.3 +/-    1.54  0.040 / 0.040
G25     280.0          59.9                8.5 +/-    3.60       9.7 +/-    3.60  0.030 / 0.040
G29     312.0          33.7                8.8 +/-    0.98      14.3 +/-    0.98  0.030 / 0.030