PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-01:57:40
G02     4.2            74.2                9.3 +/-    0.47       9.7 +/-    0.47  0.020 / 0.040
G05     160.4          39.5               12.3 +/-    1.11      18.1 +/-    1.11  0.040 / 0.030
G06     43.1           35.6                7.9 +/-    0.42      12.3 +/-    0.42  0.050 / 0.070
G12     300.2          75.6                8.6 +/-    0.69       8.9 +/-    0.69  0.040 / 0.060
G17     88.5           12.2                8.0 +/-    1.57      21.3 +/-    1.57  0.030 / 0.040
G19     79.2           25.0                8.6 +/-    0.91      16.7 +/-    0.91  0.030 / 0.030
G24     224.7          19.2               13.1 +/-    1.66      29.3 +/-    1.66  0.060 / 0.130
G25     316.3          32.6                9.3 +/-    1.39      15.5 +/-    1.39  0.060 / 0.100
G29     289.7          11.4                7.4 +/-    9.90      20.1 +/-    9.90  0.110 / 0.250