PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/09-22:27:50
G02     54.6           37.2                7.1 +/-    1.34      10.8 +/-    1.34  0.030 / 0.030
G05     67.0           65.0                8.1 +/-    0.47       8.9 +/-    0.47  0.030 / 0.030
G12     183.7          36.3               10.9 +/-    1.29      16.8 +/-    1.29  0.040 / 0.050
G13     132.1          11.6               12.3 +/-    2.63      33.1 +/-    2.63  0.040 / 0.050
G21     266.8          13.2               11.5 +/-    3.81      30.0 +/-    3.81  0.170 / 0.380
G25     245.3          55.2                9.4 +/-    1.52      11.2 +/-    1.52  0.200 / 0.240
G29     324.0          48.3                8.1 +/-    0.82      10.4 +/-    0.82  0.040 / 0.080