PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/21-15:28:10
G02     56.3           36.1                7.1 +/-    0.53      11.1 +/-    0.53  0.040 / 0.070
G05     66.9           67.1                9.6 +/-    0.56      10.3 +/-    0.56  0.040 / 0.070
G12     184.0          34.1               10.0 +/-    2.51      16.1 +/-    2.51  0.180 / 0.420
G13     129.6          13.5               11.1 +/-    1.53      28.7 +/-    1.53  0.130 / 0.390
G21     269.9          16.6               10.1 +/-    1.09      24.2 +/-    1.09  0.040 / 0.030
G25     234.1          53.0                8.4 +/-    1.25      10.3 +/-    1.25  0.030 / 0.030
G29     326.9          52.2                7.6 +/-    0.79       9.3 +/-    0.79  0.040 / 0.060