WAMDII: wide-angle Michelson Doppler imaging interferometer for Spacelab
Abstract
A wide-angle Michelson Doppler imaging interferometer (WAMDII) is described that is intended to measure upper atmospheric winds and temperatures from naturally occurring visible region emissions, using Spacelab as a platform. It is an achromatic field-widened instrument, with good thermal stability, that employs four quarterwave phase-stepped images to generate full images of velocity, temperature, and emission rate. For an apparent emission rate of 5 kR and binning into 85 x 105 pixels, the required exposure time is 1 sec. The concept and underlying principles are described, along with some fabrication details for the prototype instrument. The results of laboratory tests and field measurements using auroral emissions are described and discussed.
- Publication:
-
Applied Optics
- Pub Date:
- June 1985
- DOI:
- 10.1364/AO.24.001571
- Bibcode:
- 1985ApOpt..24.1571S
- Keywords:
-
- Atmospheric Sounding;
- Michelson Interferometers;
- Spacecraft Instruments;
- Spacelab Payloads;
- Wide Angle Lenses;
- Atmospheric Temperature;
- Calibrating;
- Charge Coupled Devices;
- Difference Equations;
- Doppler Effect;
- Thermal Stability;
- Visibility;
- Wind Measurement;
- Spacecraft Instrumentation;
- SPACE OPTICS;
- INTERFEROMETERS;
- WINDS;
- TEMPERATURE;
- DOPPLER EFFECT