PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-19:43:10
G10     257.6          33.7               12.0 +/-    1.72      19.5 +/-    1.72  0.060 / 0.050
G13     46.9           24.0               10.2 +/-    2.46      20.4 +/-    2.46  0.060 / 0.060
G15     72.3           55.1               11.2 +/-    0.70      13.4 +/-    0.70  0.070 / 0.170
G16     287.7          15.0                7.7 +/-    2.37      19.2 +/-    2.37  0.070 / 0.210
G20     282.6          56.3               11.5 +/-    2.44      13.5 +/-    2.44  0.040 / 0.040
G21     343.6          64.8               11.7 +/-    0.83      12.8 +/-    0.83  0.030 / 0.040
G26     261.1          12.3               11.1 +/-    2.01      29.6 +/-    2.01  0.160 / 0.280
G27     322.0          10.9              -13.7 +/-   18.73     -37.5 +/-   18.73  0.240 / 0.340
G29     165.7          42.2               12.9 +/-    0.66      18.1 +/-    0.66  0.150 / 0.000