PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-18:27:50
G02     25.8           60.9                8.9 +/-    0.77      10.1 +/-    0.77  0.030 / 0.030
G05     146.6          58.3               10.2 +/-    0.53      11.8 +/-    0.53  0.040 / 0.040
G06     52.3           16.9                8.1 +/-    2.27      19.2 +/-    2.27  0.030 / 0.030
G12     192.7          69.1                9.1 +/-    0.24       9.6 +/-    0.24  0.030 / 0.030
G19     95.4           15.2                9.5 +/-    2.12      23.6 +/-    2.12  0.040 / 0.050
G25     301.6          51.6               10.4 +/-    2.40      12.9 +/-    2.40  0.040 / 0.060
G29     303.8          23.7                9.4 +/-    1.40      18.9 +/-    1.40  0.110 / 0.130