Preprints
https://doi.org/10.5194/tc-2022-203
https://doi.org/10.5194/tc-2022-203
 
11 Oct 2022
11 Oct 2022
Status: this preprint is currently under review for the journal TC.

Brief Communication: Glacier mapping and change estimation using very high resolution declassified Hexagon KH-9 panoramic stereo imagery (1971–1984)

Sajid Ghuffar1,2, Owen King1, Grégoire Guillet1, Ewelina Rupnik3, and Tobias Bolch1 Sajid Ghuffar et al.
  • 1School of Geography and Sustainable Development, University of St Andrews, St Andrews, UK
  • 2Department of Space Science, Institute of Space Technology, Islamabad, Pakistan
  • 3LASTIG, Univ Gustave Eiffel, ENSG, IGN, F-94160 Saint-Mande, France

Abstract. The panoramic cameras (PC) onboard Hexagon KH-9 satellite missions from 1971–1984 captured very-high resolution stereo imagery with up to 60 cm spatial resolution. This study explores the potential of this imagery for glacier mapping and change estimation. We assess KH-9PC imagery using data from KH-9 Mapping Camera (MC), KH-4PC as well as SPOT and Pleiades satellites. The high resolution of KH-9PC leads to higher quality DEMs, which better resolve the accumulation region of the glaciers in comparison to the KH-9MC. On stable terrain, KH-9PC DEMs achieve an elevation accuracy <4 m with respect to SPOT and Pleiades DEMs. While the estimated geodetic mass balance using PC and MC data are similar, the elevation change data show superior spatial coverage and considerably less noise.

Sajid Ghuffar et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on tc-2022-203', Amaury Dehecq, 14 Nov 2022
  • RC2: 'Comment on tc-2022-203', Anonymous Referee #2, 22 Nov 2022

Sajid Ghuffar et al.

Sajid Ghuffar et al.

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Short summary
The panoramic cameras (PC) onboard Hexagon KH-9 satellite missions from 1971–1984 captured very-high resolution stereo imagery with up to 60 cm spatial resolution. This study explores the potential of this imagery for glacier mapping and change estimation. The high resolution of KH-9PC leads to higher quality DEMs, which better resolve the accumulation region of the glaciers in comparison to the KH-9MC.