PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/16-16:57:30
G02     57.9           34.3                9.2 +/-    0.59      14.7 +/-    0.59  0.050 / 0.070
G05     60.6           63.6                9.3 +/-    1.19      10.3 +/-    1.19  0.050 / 0.060
G12     183.6          33.1               12.0 +/-    1.84      19.8 +/-    1.84  0.130 / 0.390
G13     127.1          14.5               13.9 +/-    3.30      35.0 +/-    3.30  0.120 / 0.430
G15     164.4          11.9               15.0 +/-    2.48      40.2 +/-    2.48  0.150 / 0.450
G21     270.9          16.1               10.0 +/-    1.81      24.2 +/-    1.81  0.180 / 0.430
G25     239.0          52.6                9.5 +/-    1.51      11.6 +/-    1.51  0.070 / 0.110
G29     327.9          53.4                6.6 +/-    1.39       8.0 +/-    1.39  0.080 / 0.110