PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/25-06:43:00
G02     56.0           35.0                1.9 +/-    1.21       3.0 +/-    1.21  0.140 / 0.200
G05     65.8           64.4                3.5 +/-    0.66       3.8 +/-    0.66  0.180 / 0.170
G12     187.3          40.1                4.6 +/-    1.69       6.7 +/-    1.69  0.210 / 0.350
G13     131.3          11.7                5.5 +/-    2.03      14.7 +/-    2.03  0.230 / 0.390
G21     269.1          17.9                4.4 +/-    1.18      10.2 +/-    1.18  0.050 / 0.070
G25     239.7          55.0                3.0 +/-    2.81       3.6 +/-    2.81  0.080 / 0.060
G29     329.2          54.2                3.0 +/-    0.88       3.6 +/-    0.88  0.070 / 0.050