Browsing by Author "Hobbs, Stephen"

Browsing by Author "Hobbs, Stephen"

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  • Target position and trajectory measurements by videogrammetry 
    Hobbs, Stephen (2003-11-11)
    This report documents the algorithms, data processing and software for the video photogrammetry ("videogrammetry") system developed at Cranfield University. Cranfield's system has been used successfully since 1999 on a ...
  • Videogrammetry: A practical method for measuring vegetation motion in wind demonstrated on wheat. 
    Hobbs, Stephen; Seynat, Cedric; Matakidis, Panos (Elsevier Science B.V., Amsterdam., 2007-02-10)
    Plant motion in wind is a common phenomenon but has rarely been quantified. Among other effects, plant motion is known to affect the quality (or “coherence”) of interferometric radar images although the loss of quality is ...
  • What might sustainability of the GEO region look like? 
    Kingston, Jenny; Felicetti, Leonard; Hobbs, Stephen (Society of Photo-Optical Instrumentation Engineers (SPIE), 2021-10-12)
    Sustainability in space is often discussed, but as a community we are only gradually learning what it actually means. To inform this understanding, a set of three parallel projects ran at Cranfield University (Oct 2020 to ...
  • Wheat video experiments 2000 data archive 
    Hobbs, Stephen; Seynat, Cedric (2000)
    Observations of wheat motion in wind were made through the later part of the growing season (June - August) for wheat on Cranfield Airfield in 2000. The data collected include stereo videogrammetric measurements of the ...
  • Widespread occurrence of anomalous C-band backscatter signals in arid environments caused by subsurface scattering 
    Wagner, Wolfgang; Lindorfer, Roland; Melzer, Thomas; Hahn, Sebastian; Bauer-Marschallinger, Bernhard; Morrison, Keith; Calvet, Jean-Christophe; Hobbs, Stephen; Quast, Raphael; Greimeister-Pfeil, Isabella; Vreugdenhil, Mariette (Elsevier, 2022-04-22)
    Backscatter measured by scatterometers and Synthetic Aperture Radars is sensitive to the dielectric properties of the soil and normally increases with increasing soil moisture content. However, when the soil is dry, the ...