PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-00:13:10
G10     262.0          35.1               11.4 +/-    1.28      18.0 +/-    1.28  0.140 / 0.230
G13     44.4           21.8                8.4 +/-    2.08      17.8 +/-    2.08  0.150 / 0.220
G15     67.9           54.5                9.5 +/-    0.63      11.4 +/-    0.63  0.040 / 0.040
G16     282.1          13.8                9.1 +/-    2.79      23.4 +/-    2.79  0.050 / 0.040
G20     269.3          37.9                7.9 +/-    1.72      12.0 +/-    1.72  0.140 / 0.440
G21     350.0          68.1                9.4 +/-    0.41      10.1 +/-    0.41  0.120 / 0.470
G24     123.0          11.5               10.4 +/-    2.03      28.0 +/-    2.03  0.270 / 0.390
G27     320.6          14.9                8.3 +/-    2.73      20.8 +/-    2.73  0.210 / 0.310
G29     167.8          37.5                9.8 +/-    1.40      14.9 +/-    1.40  0.170 / 0.220