Accession Number:

ADA453800

Title:

Prototype Cryospheric Experimental Synthetic Aperture Radiometer (CESAR)

Descriptive Note:

Conference paper

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION GREENBELT MD GODDARD SPACE FLIGHT CENTER

Report Date:

2005-07-25

Pagination or Media Count:

5.0

Abstract:

Significantly enhanced spatial resolution is critically important to reduce the uncertainty of estimated cryospheric parameters in heterogeneous and climatically-sensitive areas a spot size of no more than 100 m is necessary to retrieve the information needed. At Goddard Space Flight Center, activepassive microwave remote sensing calibration and validation programs have resulted in instrumentation that uses the underside of the fuselage and wing space of Uninhabited Aerial Vehicles UAVs as small remote sensing platforms. The Cryospheric Experimental Synthetic Aperture Radiometer CESAR is a NASA proposal to fly K-Band and Ka-Band thinned arrays on a UAV in order to measure at 100 meter ground resolution. Prior to the flight of CESAR, a prototype CESAR will be tested with elements that will fly at lower altitudes to begin the system level testing of the synthetic array with commercial-off-the-shelf COTS components. The K-Band and Ka-Band COTS prototype receivers will be augmented with monolithic microwave integrated circuits MMICs and multi-chip module receivers to be developed at Colorado State University. These miniaturized MMIC-based receivers have been designed to be installed inside the wing of the CESAR UAV, a specialized vehicle developed specifically for this high spatial resolution research. The antenna element positions along the wing will be monitored to allow for correction in software of deviations from a planar collecting array. In addition to the MMIC-based receivers, CESAR will employ a correlator chip developed for the Lightweight Rainfall Radiometer LRR. This rad-hardened low power and low mass system was developed for Synthetic Thinned Array Radiometer STAR systems where mass and power are minimized to result in the largest collecting aperture possible on a given platform.

Subject Categories:

  • Cartography and Aerial Photography
  • Active and Passive Radar Detection and Equipment
  • Pilotless Aircraft
  • Research and Experimental Aircraft
  • Physical and Dynamic Oceanography
  • Snow, Ice and Permafrost

Distribution Statement:

APPROVED FOR PUBLIC RELEASE