el1 el2 el3 el4
920804400: nan nan nan nan
920805000: 7.15828e+06 7.60850e+02 0.00000e+00 9.56000e-01
920805600: 9.00000e-02 3.83056e+04 8.71667e-01 1.26515e+01
920806200: 7.15828e+06 9.50000e-01 -8.01667e-01 1.20000e-01
920806800: 7.15828e+06 1.99500e+00 1.24000e+00 9.81667e-02