Chirped pulse Fourier transform microwave (CP-FTMW) spectrometers have become the instrument of choice for acquiring rotational spectra, due to their high sensitivity, fast acquisition rate, and large bandwidth. Here we present the design and capabilities of a recently constructed CP-FTMW spectrometer using direct digital synthesis (DDS) as a new method for chirped pulse generation, through bot...

PFS is a Fourier spectrometer developed for Mars 96 first and for Mars Express later. Mars express was launched from Baikonour on June 2, 2003 , and reached the Martian orbit on December 25 , 2003. The spectrometer covers the wavelength range from 1.2 to 5 microns and from 5 to 50 microns. At Mars we have operated the experiment on 20 orbits roughly, up to now. A power problem on the spacecraft...

We present a miniaturized Fourier transform spectrometer (FTS) based on optical microelectromechanical system technology. The FTS is a Michelson interferometer with one scanning mirror. A new type of electrostatic comb drive actuator moves the mirror. We have measured a nonlinearity of the driving system of +/-0.5 mum for a displacement of 38.5 mum . A method is presented to correct the spectru...