PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/25-20:28:00
G02     59.6           33.5               12.8 +/-    0.86      20.9 +/-    0.86  0.040 / 0.070
G05     61.6           65.4               16.4 +/-    0.75      17.8 +/-    0.75  0.050 / 0.070
G12     184.7          31.0               19.3 +/-    1.84      33.1 +/-    1.84  0.150 / 0.310
G13     129.1          15.8               20.7 +/-    2.17      50.5 +/-    2.17  0.120 / 0.310
G15     164.1          12.2               25.7 +/-    3.23      68.3 +/-    3.23  0.100 / 0.110
G20     207.6          62.3               20.0 +/-    0.80      22.3 +/-    0.80  0.040 / 0.110
G21     272.0          18.5               15.8 +/-    1.05      36.0 +/-    1.05  0.030 / 0.040
G25     228.5          50.0               19.7 +/-    2.01      24.8 +/-    2.01  0.030 / 0.050
G29     331.4          58.4               14.9 +/-    1.07      17.1 +/-    1.07  0.030 / 0.040