PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-05:57:40
G10     275.3          43.6                6.4 +/-    1.06       8.8 +/-    1.06  0.040 / 0.040
G13     38.9           12.1                2.7 +/-    1.59       7.2 +/-    1.59  0.040 / 0.040
G15     52.3           41.9                4.5 +/-    0.37       6.3 +/-    0.37  0.100 / 0.140
G20     312.5          63.0                5.1 +/-    0.91       5.7 +/-    0.91  0.110 / 0.150
G21     30.2           75.5                4.8 +/-    0.62       5.0 +/-    0.62  0.060 / 0.060
G24     113.7          18.3                6.1 +/-    1.45      14.0 +/-    1.45  0.070 / 0.070
G27     315.9          22.9                3.0 +/-    2.16       6.1 +/-    2.16  0.140 / 0.320
G29     166.2          20.7                5.5 +/-    1.99      11.9 +/-    1.99  0.200 / 0.430
G32     206.4          11.6                0.5 +/-   30.88       1.5 +/-   30.88  0.100 / 0.230