PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-22:42:40
G02     61.6           32.6               10.1 +/-    0.36      16.8 +/-    0.36  0.050 / 0.080
G05     54.7           60.3               11.1 +/-    0.42      12.6 +/-    0.42  0.050 / 0.080
G12     183.3          26.4               16.0 +/-    1.63      30.3 +/-    1.63  0.030 / 0.040
G13     125.9          18.4               14.3 +/-    1.24      32.7 +/-    1.24  0.030 / 0.040
G15     163.3          14.3               15.1 +/-    1.60      38.2 +/-    1.60  0.100 / 0.260
G20     209.4          67.0               14.9 +/-    1.01      16.0 +/-    1.01  0.110 / 0.270
G21     274.6          20.1               12.5 +/-    1.18      27.5 +/-    1.18  0.030 / 0.040
G25     223.4          46.7               14.0 +/-    0.95      18.4 +/-    0.95  0.020 / 0.030
G29     332.7          60.8               12.9 +/-    1.09      14.5 +/-    1.09  0.070 / 0.130