PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-17:27:40
G01     41.0097        15.7572          8.5417 +/-  1.2426   20.8581 +/-  1.2426  0.100 / 0.360
G06     174.4006       39.9804         14.4364 +/-  0.8276   21.0040 +/-  0.8276  0.090 / 0.310
G13     239.1581       21.9393         11.9492 +/-  3.2375   25.0868 +/-  3.2375  0.050 / 0.120
G15     274.5315       12.1098         11.8440 +/-  1.5102   31.5436 +/-  1.5102  0.090 / 0.140
G17     8.6429         68.5336         11.3197 +/-  0.8306   12.0691 +/-  0.8306  0.030 / 0.090
G19     283.8620       70.9547         11.4259 +/-  0.8982   12.0152 +/-  0.8982  0.030 / 0.040
G24     317.2323       17.9999         11.7737 +/-  2.9209   27.2088 +/-  2.9209  0.130 / 0.290
G28     72.2419        46.6325          9.6797 +/-  1.0647   12.7508 +/-  1.0647  0.110 / 0.300
G30     155.0853       29.5864         13.0045 +/-  0.9679   22.9715 +/-  0.9679  0.140 / 0.220