PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/23-07:57:30
G10     258.0          33.3                5.1 +/-    1.92       8.3 +/-    1.92  0.040 / 0.040
G13     46.8           24.2                4.3 +/-    1.57       8.6 +/-    1.57  0.040 / 0.040
G15     69.9           53.7                5.1 +/-    0.46       6.2 +/-    0.46  0.110 / 0.320
G16     293.1          13.3                2.7 +/-    1.71       7.1 +/-    1.71  0.110 / 0.300
G20     282.3          56.0                4.8 +/-    2.06       5.6 +/-    2.06  0.100 / 0.120
G21     352.2          67.6                4.9 +/-    0.64       5.2 +/-    0.64  0.060 / 0.200
G26     264.7          12.0                5.8 +/-    4.65      15.6 +/-    4.65  0.060 / 0.070
G29     163.1          35.3                7.0 +/-    0.72      11.1 +/-    0.72  0.050 / 0.060