PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-07:58:00
G08     295.8          22.9                3.9 +/-    1.56       8.1 +/-    1.56  0.050 / 0.080
G10     5.0            62.8                3.8 +/-    0.52       4.2 +/-    0.52  0.040 / 0.090
G14     227.4          45.0                6.8 +/-    1.36       9.2 +/-    1.36  0.030 / 0.030
G20     62.3           53.3                4.4 +/-    0.65       5.3 +/-    0.65  0.050 / 0.030
G21     145.2          41.4                6.1 +/-    0.85       8.7 +/-    0.85  0.070 / 0.100
G24     57.5           25.8                4.1 +/-    0.87       7.8 +/-    0.87  0.080 / 0.100
G27     258.7          33.1                4.7 +/-    0.68       7.7 +/-    0.68  0.080 / 0.120
G32     238.6          61.2                7.4 +/-    0.78       8.4 +/-    0.78  0.080 / 0.120