PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-21:58:10
G10     256.2          30.3               15.5 +/-    1.82      27.0 +/-    1.82  0.060 / 0.090
G13     49.3           27.6                9.5 +/-    1.06      17.5 +/-    1.06  0.070 / 0.100
G15     75.0           55.7               13.2 +/-    0.65      15.6 +/-    0.65  0.110 / 0.290
G16     292.6          13.6               11.9 +/-    0.96      30.5 +/-    0.96  0.170 / 0.320
G18     279.5          59.6               13.5 +/-    0.84      15.3 +/-    0.84  0.070 / 0.240
G20     47.4           42.7               13.6 +/-    1.36      19.0 +/-    1.36  0.100 / 0.230
G21     344.3          65.5               11.3 +/-    1.34      12.3 +/-    1.34  0.210 / 0.260
G26     265.2          12.7               14.8 +/-    0.97      38.7 +/-    0.97  0.130 / 0.300
G27     321.6          11.7                1.3 +/-   31.50       3.5 +/-   31.50  0.060 / 0.050
G29     164.7          38.9               16.1 +/-    1.55      23.9 +/-    1.55  0.060 / 0.050