PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-20:28:00
G02     21.8           63.8                8.7 +/-    0.99       9.5 +/-    0.99  0.040 / 0.050
G05     151.0          54.0               11.0 +/-    0.67      13.2 +/-    0.67  0.040 / 0.040
G06     49.7           21.1                7.7 +/-    0.82      16.4 +/-    0.82  0.030 / 0.040
G12     205.3          75.2               10.7 +/-    0.75      11.0 +/-    0.75  0.030 / 0.030
G19     91.7           17.6               10.8 +/-    2.10      25.2 +/-    2.10  0.040 / 0.060
G25     307.3          47.3                9.0 +/-    1.45      11.8 +/-    1.45  0.040 / 0.040
G29     300.4          20.5               11.3 +/-    2.01      24.5 +/-    2.01  0.050 / 0.080