PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/30-20:28:00
G02     10.0           70.1               10.8 +/-    0.40      11.4 +/-    0.40  0.040 / 0.040
G05     160.4          46.1               13.3 +/-    1.21      17.7 +/-    1.21  0.050 / 0.040
G06     47.1           26.9                7.2 +/-    1.55      13.4 +/-    1.55  0.060 / 0.060
G12     240.3          79.7               10.9 +/-    0.25      11.1 +/-    0.25  0.050 / 0.070
G19     89.3           16.7               10.2 +/-    2.07      24.3 +/-    2.07  0.100 / 0.480
G20     197.0          13.7               17.4 +/-    1.11      44.8 +/-    1.11  0.150 / 0.310
G24     219.2          13.1               15.6 +/-    1.98      40.5 +/-    1.98  0.040 / 0.030
G25     309.6          47.2               11.4 +/-    1.65      14.9 +/-    1.65  0.030 / 0.020
G29     297.8          19.3               11.3 +/-    1.05      25.2 +/-    1.05  0.060 / 0.050