PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-21:13:00
G10     255.8          30.0               16.5 +/-    2.16      28.9 +/-    2.16  0.070 / 0.110
G13     49.6           27.8               12.4 +/-    1.58      22.7 +/-    1.58  0.150 / 0.130
G15     75.2           55.6               15.6 +/-    0.69      18.5 +/-    0.69  0.140 / 0.240
G16     293.5          13.6               14.1 +/-    3.27      36.4 +/-    3.27  0.140 / 0.210
G18     279.1          59.6               16.0 +/-    1.67      18.3 +/-    1.67  0.050 / 0.040
G20     47.0           43.4               13.9 +/-    0.90      19.1 +/-    0.90  0.060 / 0.040
G21     344.4          65.5               15.0 +/-    0.78      16.3 +/-    0.78  0.070 / 0.060
G26     266.1          12.9               17.2 +/-    1.17      44.9 +/-    1.17  0.070 / 0.040
G27     321.7          11.3                0.8 +/-   33.29       2.2 +/-   33.29  0.380 / 0.220
G29     164.4          38.8               17.4 +/-    0.61      25.7 +/-    0.61  0.300 / 0.470