PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/30-14:58:00
G02     34.9           53.3                7.5 +/-    1.25       9.1 +/-    1.25  0.030 / 0.030
G05     139.3          64.0                8.6 +/-    0.34       9.5 +/-    0.34  0.030 / 0.040
G06     55.4           12.2                5.9 +/-    2.52      15.6 +/-    2.52  0.170 / 0.140
G12     192.1          63.7                6.5 +/-    0.51       7.1 +/-    0.51  0.110 / 0.120
G25     292.7          54.7                7.6 +/-    0.95       9.1 +/-    0.95  0.030 / 0.030
G29     309.0          29.7                7.2 +/-    0.99      12.7 +/-    0.99  0.020 / 0.030