PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-20:43:00
G02     22.7           63.3               10.0 +/-    1.41      11.1 +/-    1.41  0.030 / 0.040
G05     153.9          54.8               13.0 +/-    0.86      15.5 +/-    0.86  0.030 / 0.040
G06     51.1           20.1                7.2 +/-    1.03      15.7 +/-    1.03  0.050 / 0.070
G12     206.4          73.1               10.0 +/-    1.38      10.4 +/-    1.38  0.040 / 0.060
G19     96.3           11.6                9.5 +/-    1.29      25.5 +/-    1.29  0.090 / 0.130
G20     197.2          21.7               16.2 +/-    1.34      34.2 +/-    1.34  0.070 / 0.130
G25     300.5          54.0               10.8 +/-    1.51      13.0 +/-    1.51  0.040 / 0.050
G29     304.0          25.2               11.2 +/-    1.76      21.8 +/-    1.76  0.030 / 0.040