PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-20:57:50
G02     79.2           17.8               14.7 +/-    2.11      34.2 +/-    2.11  0.110 / 0.190
G13     107.0          31.2               19.8 +/-    0.89      33.9 +/-    0.89  0.080 / 0.180
G15     149.7          32.8               22.4 +/-    0.43      37.1 +/-    0.43  0.060 / 0.140
G18     228.1          22.4               21.5 +/-    2.17      44.6 +/-    2.17  0.060 / 0.150
G20     292.3          86.2               16.8 +/-    0.70      16.8 +/-    0.70  0.090 / 0.260
G21     292.3          33.2               15.0 +/-    1.14      24.6 +/-    1.14  0.110 / 0.240
G25     208.5          28.4               19.4 +/-    2.68      35.2 +/-    2.68  0.030 / 0.040
G26     312.4          14.9               12.7 +/-    2.31      31.8 +/-    2.31  0.040 / 0.030
G29     9.1            83.2               15.6 +/-    0.74      15.7 +/-    0.74  0.040 / 0.050