PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-21:43:00
G10     256.4          30.4               16.7 +/-    1.12      29.0 +/-    1.12  0.090 / 0.170
G13     49.1           27.5               12.8 +/-    1.90      23.7 +/-    1.90  0.070 / 0.080
G15     74.5           55.5               14.9 +/-    0.54      17.6 +/-    0.54  0.050 / 0.040
G16     292.6          13.6               10.4 +/-    1.70      26.7 +/-    1.70  0.030 / 0.030
G18     279.9          59.8               15.4 +/-    1.56      17.6 +/-    1.56  0.170 / 0.270
G20     47.5           42.7               13.6 +/-    1.30      18.9 +/-    1.30  0.160 / 0.280
G21     344.9          65.7               14.5 +/-    0.49      15.7 +/-    0.49  0.430 / 0.400
G26     265.3          12.7               14.7 +/-    3.86      38.6 +/-    3.86  0.210 / 0.230
G27     321.6          11.9                5.0 +/-   24.38      13.4 +/-   24.38  0.050 / 0.060
G29     164.7          38.5               18.0 +/-    0.72      26.8 +/-    0.72  0.050 / 0.060