PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-21:27:40
G02     73.6           22.4               10.6 +/-    2.04      22.1 +/-    2.04  0.090 / 0.180
G05     45.8           48.7               11.9 +/-    0.48      15.3 +/-    0.48  0.100 / 0.160
G12     180.9          13.6               18.9 +/-    1.38      48.7 +/-    1.38  0.060 / 0.310
G13     113.8          27.4               15.3 +/-    1.06      28.3 +/-    1.06  0.060 / 0.350
G15     154.5          26.7               17.4 +/-    1.47      32.6 +/-    1.47  0.070 / 0.130
G18     224.6          16.4               19.0 +/-    2.37      45.8 +/-    2.37  0.080 / 0.120
G20     231.5          81.6               14.2 +/-    1.01      14.4 +/-    1.01  0.030 / 0.050
G21     286.5          28.9               11.8 +/-    2.42      21.2 +/-    2.42  0.030 / 0.060
G25     212.2          34.2               16.3 +/-    1.52      26.3 +/-    1.52  0.020 / 0.030
G29     347.7          76.0               14.6 +/-    0.37      15.0 +/-    0.37  0.030 / 0.030