PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-19:28:00
G02     52.1           39.8               10.1 +/-    1.08      14.7 +/-    1.08  0.030 / 0.040
G05     72.7           67.0                9.5 +/-    0.70      10.3 +/-    0.70  0.030 / 0.040
G12     182.4          36.7               11.9 +/-    1.25      18.3 +/-    1.25  0.210 / 0.560
G13     133.3          10.4               -5.2 +/-   27.92     -14.3 +/-   27.92  0.220 / 0.520
G21     265.2          11.8                9.6 +/-    5.99      25.6 +/-    5.99  0.050 / 0.070
G25     247.1          56.2               11.1 +/-    0.83      13.0 +/-    0.83  0.040 / 0.080
G29     322.7          46.5                7.6 +/-    1.56      10.0 +/-    1.56  0.040 / 0.050