PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/04-06:12:30
G10     294.1          51.3                4.4 +/-    1.23       5.5 +/-    1.23  0.060 / 0.090
G15     46.4           29.5                2.3 +/-    0.85       4.0 +/-    0.85  0.050 / 0.100
G20     345.6          65.3                3.1 +/-    0.39       3.4 +/-    0.39  0.040 / 0.050
G21     88.5           74.6                5.3 +/-    0.91       5.5 +/-    0.91  0.040 / 0.040
G24     100.1          25.3                5.8 +/-    0.65      11.3 +/-    0.65  0.040 / 0.050
G27     305.0          31.9                4.7 +/-    1.57       8.0 +/-    1.57  0.040 / 0.050
G32     210.0          25.0                5.5 +/-    1.31      10.7 +/-    1.31  0.060 / 0.110