PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-20:43:00
G02     73.9           21.9               14.1 +/-    1.64      29.6 +/-    1.64  0.060 / 0.140
G12     181.1          13.9               23.6 +/-    3.26      60.4 +/-    3.26  0.080 / 0.130
G13     114.0          27.4               21.0 +/-    0.90      38.9 +/-    0.90  0.080 / 0.210
G15     154.0          26.9               23.0 +/-    1.68      43.1 +/-    1.68  0.090 / 0.210
G18     224.6          16.7               20.1 +/-    2.24      48.1 +/-    2.24  0.110 / 0.370
G20     231.5          81.3               18.8 +/-    0.48      19.0 +/-    0.48  0.060 / 0.310
G21     286.6          29.2               15.6 +/-    1.23      27.7 +/-    1.23  0.120 / 0.300
G25     212.7          34.5               19.8 +/-    2.64      31.6 +/-    2.64  0.110 / 0.280
G26     317.5          11.7               11.3 +/-    3.73      30.3 +/-    3.73  0.030 / 0.040
G29     349.1          76.5               17.0 +/-    0.60      17.5 +/-    0.60  0.030 / 0.030