PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-20:57:40
G10     256.4          30.4               19.8 +/-    1.64      34.3 +/-    1.64  0.080 / 0.170
G13     49.1           27.4               16.2 +/-    2.11      29.9 +/-    2.11  0.080 / 0.110
G15     74.0           55.2               18.8 +/-    1.06      22.4 +/-    1.06  0.130 / 0.230
G16     293.1          13.4               14.7 +/-    2.42      38.0 +/-    2.42  0.160 / 0.270
G18     280.3          60.0               18.3 +/-    1.49      20.7 +/-    1.49  0.050 / 0.030
G20     47.3           43.0               17.9 +/-    0.98      24.8 +/-    0.98  0.040 / 0.030
G21     345.7          66.0               18.0 +/-    0.67      19.5 +/-    0.67  0.050 / 0.050
G26     265.8          12.6               18.2 +/-    1.58      47.8 +/-    1.58  0.060 / 0.050
G27     321.6          11.8                6.8 +/-   31.02      18.3 +/-   31.02  0.340 / 0.300
G29     164.4          38.0               20.3 +/-    1.01      30.6 +/-    1.01  0.220 / 0.170