Preprints
https://doi.org/10.5194/tc-2022-203
https://doi.org/10.5194/tc-2022-203
11 Oct 2022
 | 11 Oct 2022
Status: a revised version of this preprint was accepted for the journal TC and is expected to appear here in due course.

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

Sajid Ghuffar, Owen King, Grégoire Guillet, Ewelina Rupnik, and Tobias Bolch

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: closed

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
    • AC1: 'Reply on RC1', Sajid Ghuffar, 26 Dec 2022
  • RC2: 'Comment on tc-2022-203', Anonymous Referee #2, 22 Nov 2022
    • AC2: 'Reply on RC2', Sajid Ghuffar, 26 Dec 2022

Status: closed

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
    • AC1: 'Reply on RC1', Sajid Ghuffar, 26 Dec 2022
  • RC2: 'Comment on tc-2022-203', Anonymous Referee #2, 22 Nov 2022
    • AC2: 'Reply on RC2', Sajid Ghuffar, 26 Dec 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.