PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-22:13:10
G02     58.3           34.2                9.5 +/-    0.42      15.3 +/-    0.42  0.030 / 0.040
G05     59.0           61.5               11.1 +/-    0.70      12.4 +/-    0.70  0.030 / 0.040
G12     182.7          31.1               14.2 +/-    0.75      24.4 +/-    0.75  0.040 / 0.110
G13     128.6          14.7               14.5 +/-    2.43      36.3 +/-    2.43  0.040 / 0.110
G15     165.9          10.6               -2.1 +/-   34.52      -5.8 +/-   34.52  0.060 / 0.100
G21     270.4          16.0               15.1 +/-    2.49      36.5 +/-    2.49  0.060 / 0.100
G25     237.3          52.4               11.5 +/-    1.29      14.1 +/-    1.29  0.130 / 0.430
G29     326.9          52.7               10.8 +/-    1.01      13.2 +/-    1.01  0.200 / 0.430