PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/27-18:43:10
G10     249.8          27.8               18.7 +/-    1.64      34.3 +/-    1.64  0.050 / 0.060
G13     53.7           29.2               15.2 +/-    1.60      27.1 +/-    1.60  0.050 / 0.050
G15     87.7           57.6               16.3 +/-    0.56      18.9 +/-    0.56  0.170 / 0.470
G16     296.1          15.9               13.8 +/-    1.48      33.6 +/-    1.48  0.150 / 0.530
G20     270.1          51.4               16.7 +/-    3.15      20.7 +/-    3.15  0.130 / 0.140
G21     332.4          58.8               15.2 +/-    0.69      17.4 +/-    0.69  0.130 / 0.150
G26     268.9          15.8               17.9 +/-    2.21      43.6 +/-    2.21  0.040 / 0.040
G29     163.5          51.9               17.9 +/-    1.14      22.1 +/-    1.14  0.050 / 0.040