PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/29-21:57:40
G02     50.2           40.3                8.4 +/-    1.04      12.1 +/-    1.04  0.160 / 0.420
G05     79.7           67.9                8.0 +/-    0.51       8.6 +/-    0.51  0.040 / 0.060
G12     188.2          46.3               10.8 +/-    1.00      14.3 +/-    1.00  0.040 / 0.050
G21     262.9          10.1               -7.2 +/-   10.63     -20.1 +/-   10.63  0.050 / 0.080
G25     257.3          57.5               10.8 +/-    0.91      12.6 +/-    0.91  0.050 / 0.070
G29     322.3          45.8                7.7 +/-    1.76      10.3 +/-    1.76  0.050 / 0.070