A space flight prototype Doppler Asymmetric Spatial Heterodyne (DASH) instrument for measuring upper atmospheric winds
Abstract
We will discuss the recent progress in increasing the technical readiness level of a space flight prototype Doppler Asymmetric Spatial Heterodyne (DASH) instrument for measuring upper atmospheric winds using the O(1D) red line at 630nm. DASH is a modified Spatial Hetero-dyne Spectrometer (SHS), and is therefore a close relative of a Fourier transform spectrometer (FTS) which can passively measure the Doppler shift of a known emission line. A DASH in-strument has the ability to measure multiple emission lines simultaneously, which avoids the requirement of an ultra-narrow bandpass filter to isolate one emission line. As a result, the throughput/sensitivity is expected to be larger than with a stepped Michelson of comparable size. Since multiple lines can be observed simultaneously, the signal of an on-orbit calibration source can be observed simultaneously with every exposure for continuous zero-wind calibration.
- Publication:
-
38th COSPAR Scientific Assembly
- Pub Date:
- 2010
- Bibcode:
- 2010cosp...38..857B