PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-16:27:50
G01     62.6881        31.0562         11.1770 +/-  0.8434   19.1522 +/-  0.8434  0.060 / 0.140
G06     180.5135       13.0992         13.7049 +/-  3.3660   35.6731 +/-  3.3660  0.090 / 0.140
G11     48.5571        22.7151          9.3684 +/-  1.0753   19.3081 +/-  1.0753  0.040 / 0.040
G13     267.9847       35.6770         12.8054 +/-  1.3608   20.0703 +/-  1.3608  0.030 / 0.040
G15     300.1024       14.8511          8.0888 +/-  1.8661   20.1925 +/-  1.8661  0.030 / 0.040
G17     255.2845       77.1341         12.9976 +/-  0.4385   13.2971 +/-  0.4385  0.020 / 0.040
G19     230.4691       50.5374         14.9617 +/-  0.8199   18.7459 +/-  0.8199  0.080 / 0.430
G28     31.3683        57.3768         11.2213 +/-  0.7670   13.0548 +/-  0.7670  0.070 / 0.360
G30     141.2350       57.6262         14.0965 +/-  1.0530   16.3605 +/-  1.0530  0.080 / 0.230