PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-20:43:10
G02     59.3           33.8               11.1 +/-    1.03      18.0 +/-    1.03  0.050 / 0.060
G05     61.6           65.3               13.3 +/-    0.60      14.5 +/-    0.60  0.050 / 0.060
G12     184.7          31.1               14.3 +/-    1.76      24.5 +/-    1.76  0.170 / 0.370
G13     129.2          15.7               14.9 +/-    2.76      36.4 +/-    2.76  0.180 / 0.330
G15     164.3          12.0               14.6 +/-    2.94      39.1 +/-    2.94  0.060 / 0.100
G20     207.5          62.2               15.1 +/-    0.63      16.8 +/-    0.63  0.090 / 0.090
G21     271.8          18.3               14.4 +/-    1.27      33.0 +/-    1.27  0.030 / 0.050
G25     228.4          50.1               16.4 +/-    2.63      20.7 +/-    2.63  0.030 / 0.050
G29     331.1          58.1               13.3 +/-    1.11      15.3 +/-    1.11  0.030 / 0.040