A new high-precision and low-power GNSS receiver for long-term  installations in remote areas

Jones, D. E.; Robinson, Carl; Gudmundsson, G. Hilmar

doi:10.5194/gi-5-65-2016

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…Possible methods to mitigate the impact of peripheral GCPs on cloud accuracy would be to supplement the GCP network with multiple telemetric dGPS units stationed on the ice itself, or to survey and incorporate the positions of the camera stations in the bundle adjustment. Low-budget, high-precision dGPS units have become increasingly available in recent years (Völksen and Mayer, 2015; Jones and others, 2016) and could facilitate concurrent measurements of 3-D ice motion. However, their successful application would again require that the dGPS units (or their associated targets) were accurately resolvable in the camera imagery.…”

Section: Discussionmentioning

confidence: 99%

An integrated Structure-from-Motion and time-lapse technique for quantifying ice-margin dynamics

et al. 2017

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Fine resolution topographic data derived from methods such as Structure from Motion (SfM) and Multi-View Stereo (MVS) have the potential to provide detailed observations of geomorphological change, but have thus far been limited by the logistical constraints of conducting repeat surveys in the field. Here, we present the results from an automated time-lapse camera array, deployed around an ice-marginal lake on the western margin of the Greenland ice sheet. Fifteen cameras acquired imagery three-times per day over a 426 day period, yielding a dataset of ~19 000 images. From these data we derived 18 point clouds of the ice-margin across a range of seasons and successfully identified calving events (ranging from 234 to 1475 m2 in area and 815–8725 m3 in volume) induced by ice cliff undercutting at the waterline and the collapse of spalling flakes. Low ambient light levels, locally reflective surfaces and the large survey range hindered analysis of smaller scale ice-margin dynamics. Nevertheless, this study demonstrates that an integrated SfM-MVS and time-lapse approach can be employed to generate long-term 3-D topographic datasets and thus quantify ice-margin dynamics at a fine spatio-temporal scale. This approach provides a template for future studies of geomorphological change.

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Section: Discussionmentioning

confidence: 99%

An integrated Structure-from-Motion and time-lapse technique for quantifying ice-margin dynamics

et al. 2017

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Depositional Processes

Hart

2022

Treatise on Geomorphology

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Observing glacier dynamics with low-cost, multi-GNSS positioning in Victoria Land, Antarctica

Still,

Odolinski,

Bowman

et al. 2023

J. Glaciol.

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This study examines the performance of low-cost, low-power GNSS positioning systems for glacier monitoring in high-latitude environments. We compare the positioning performance of co-located low-cost u-blox ZED-F9P GNSS units (a few hundred USDs) and survey-grade Trimble R10 units (> $10,000 USD) under stationary (on land) and dynamic (on glacier) conditions near Terra Nova Bay, Antarctica. Low-cost and survey-grade systems yield almost identical error magnitudes under short (3 m), medium (34 km) and long (390 km) baseline kinematic-positioning scenarios. We further examined the efficacy of low-cost GNSS for glaciological applications by installing four u-blox and two Trimble receivers on Priestley Glacier to observe tide-modulated ice flexure. All receivers successfully detected subtle tidal oscillations with amplitudes < 3 cm, consistent with the predicted phasing from a tide model. These experiments offer a strong rationale for the widespread use of low-cost receivers to expand and densify GNSS monitoring networks, both in Antarctica and in glaciated regions worldwide.

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A new high-precision and low-power GNSS receiver for long-term installations in remote areas

Cited by 4 publications

References 10 publications

An integrated Structure-from-Motion and time-lapse technique for quantifying ice-margin dynamics

An integrated Structure-from-Motion and time-lapse technique for quantifying ice-margin dynamics

Depositional Processes

Observing glacier dynamics with low-cost, multi-GNSS positioning in Victoria Land, Antarctica

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