PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/09-18:28:00
G02     38.3           51.4               15.3 +/-    0.82      18.9 +/-    0.82  0.040 / 0.050
G05     138.3          66.0               15.9 +/-    0.37      17.3 +/-    0.37  0.050 / 0.060
G06     57.6           11.6               11.2 +/-    2.50      30.3 +/-    2.50  0.040 / 0.030
G12     193.6          60.2               16.5 +/-    0.57      18.7 +/-    0.57  0.030 / 0.050
G20     199.1          33.7               14.9 +/-    0.95      24.2 +/-    0.95  0.110 / 0.130
G25     280.1          59.2               18.1 +/-    1.18      20.7 +/-    1.18  0.080 / 0.130
G29     313.8          36.2               14.6 +/-    0.63      22.6 +/-    0.63  0.030 / 0.030