|
Accession Number
|
N20120014941
|
|
Title
|
Calibration and Image Reconstruction for the Hurricane Imaging Radiometer (HIRAD).
|
|
Publication Date
|
Jul 2012
|
|
Media Count
|
4p
|
|
Personal Author
|
C. Ruf J. B. Roberts M. W. James S. Biswas T. Miller
|
|
Abstract
|
The Hurricane Imaging Radiometer (HIRAD) is a new airborne passive microwave synthetic aperture radiometer designed to provide wide swath images of ocean surface wind speed under heavy precipitation and, in particular, in tropical cyclones. It operates at 4, 5, 6 and 6.6 GHz and uses interferometric signal processing to synthesize a pushbroom imager in software from a low profile planar antenna with no mechanical scanning. HIRAD participated in NASA s Genesis and Rapid Intensification Processes (GRIP) mission during Fall 2010 as its first science field campaign. HIRAD produced images of upwelling brightness temperature over a aprox 70 km swath width with approx 3 km spatial resolution. From this, ocean surface wind speed and column averaged atmospheric liquid water content can be retrieved across the swath. The calibration and image reconstruction algorithms that were used to verify HIRAD functional performance during and immediately after GRIP were only preliminary and used a number of simplifying assumptions and approximations about the instrument design and performance. The development and performance of a more detailed and complete set of algorithms are reported here.
|
|
Keywords
|
Airborne equipment
Antennas
Calibrating
Hurricanes
Radiometers
Synthetic apertures
Tropical storms
|
|
|
Source Agency
|
National Aeronautics and Space Administration
|
|
NTIS Subject Category
|
82B - Photographic Techniques & Equipment
55D - Meteorological Instruments & Instrument Platforms
|
|
Corporate Author
|
National Aeronautics and Space Administration, Huntsville, AL. George C. Marshall Space Flight Center.
|
|
Document Type
|
Conference proceedings
|
|
Title Note
|
N/A
|
|
NTIS Issue Number
|
1308
|
|
Contract Number
|
N/A
|
