Overview of the earth observing one (eo-1) mission

Ungar, Stephen; Pearlman, Jay; Mendenhall, Jeffrey A.; Reuter, D.

doi:10.1109/tgrs.2003.815999

Cited by 283 publications

(70 citation statements)

References 13 publications

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“…The Landsatlike instruments used were the Advanced Land Imager (ALI) aboard NASA's Earth Observing 1 (EO-1) satellite, which was launched in November 2000 (Ungar et al 2003) and the Enhanced Thematic Mapper Plus (ETM+) aboard NASA's Landsat 7 satellite, launched in April 1999 (Goward et al 2001). Both these instruments acquire images from the visible to the short wave infrared (SWIR) region at 30 m resolution.…”

Section: Methodsmentioning

confidence: 99%

Does the lava lake of Erta ‘Ale volcano respond to regional magmatic and tectonic events? An investigation using Earth Observation data

Barnie

Oppenheimer

Pagli

2016

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Erta 'Ale volcano lies at the centre of the Erta 'Ale rift segment in northern Afar, Ethiopia and hosts one of the few persistent lava lakes found on Earth in its summit caldera. Previous studies have reported anecdotal evidence of a correlation between lake activity and magmatic and tectonic events in the broader region. We investigated this hypothesis for the period 2000-15 by comparing a catalogue of regional events with changes in lake activity reconstructed from Earth Observation data. The lava lake underwent dramatic changes during the study period, exhibiting an overall rise in height with concomitant changes in geometry consistent with a change in heat energy balance. Numerous paroxysms occurred in the lake and in the north pit; a significant dyke intrusion with subsequent re-intrusions indicated a role for dykes in maintaining the lake. However, despite some coincidences between the paroxysms and regional events, we did not find any statistically significant relationship between the two on a timescale of days to weeks. Nevertheless, changes in lake activity have preceded the broad increase in regional activity since 2005 and we cannot rule out a relationship on a decadal scale.Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.

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Section: Methodsmentioning

confidence: 99%

Does the lava lake of Erta ‘Ale volcano respond to regional magmatic and tectonic events? An investigation using Earth Observation data

Barnie

Oppenheimer

Pagli

2016

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“…We used thermal observations from two spaceborne sensors, the Advanced Land Imager (ALI) aboard NASA's EO-1 satellite (Ungar et al 2003;Davies et al 2006) and SEVIRI aboard EUMETSAT's Meteosat satellite (Aminou 2002). The ALI instrument collects images in nine bands in the visible to short-wave infrared sampled at 30 m intervals and one band in the panchromatic at 10 m, and can thus resolve geomorphological and high temperature features at sub-lava-flow scales.…”

Section: Thermal Remote Sensingmentioning

confidence: 99%

A multidisciplinary study of the final episode of the Manda Hararo dyke sequence, Ethiopia, and implications for trends in volcanism during the rifting cycle

Barnie

Keir

Hamling

et al. 2015

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The sequence of dyke intrusions between 2005 and 2010 in the Manda Hararo rift segment, Ethiopia, provided an opportunity to test conceptual models of continental rifting. Based on trends up to dyke 13 in the sequence, it was anticipated that, should magma supply continue, dykes would shorten in length and eruptions would increase in size and decrease in distance from the segment centre as extensional stress was progressively released. In this paper we revisit these predictions by presenting a comprehensive overview of the May 2010 dyke and fissure eruption, the 14th and last in the sequence, from InSAR, seismicity, satellite thermal data, ultraviolet SO 2 retrievals and multiple LiDAR surveys. We find the dyke is longer than other eruptive dykes in the sequence, propagating in two directions from the segment centre, but otherwise fairly typical in terms of opening, propagation speed and geodetic and seismic moment. However, though the eruption is located closer to the segment centre, it is much smaller than previous events. We interpret this as indicating that either the Manda Hararo rifting event was magma limited, or that extensional stress varies north and south of the segment centre.Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.

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“…To increase sensitivity in sparse atmospheres, such as Pluto's, the spectra from all rows may be summed into a single spectrum. The SIA is co-aligned with the Alice solar occultation (SOC) port (Stern et al 2008, this issue).…”

Section: The Solar Illumination Assembly (Sia)mentioning

confidence: 99%

Ralph: A Visible/Infrared Imager for the New Horizons Pluto/Kuiper Belt Mission

Reuter¹,

et al. 2008

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The New Horizons instrument named Ralph is a visible/near infrared multispectral imager and a short wavelength infrared spectral imager. It is one of the core instruments on New Horizons, NASA's first mission to the Pluto/Charon system and the Kuiper Belt. Ralph combines panchromatic and color imaging capabilities with SWIR imaging spectroscopy. Its primary purpose is to map the surface geology and composition of these objects, but it will also be used for atmospheric studies and to map the surface temperature. It is a compact, low-mass (10.5 kg) power efficient (7.1 W peak), and robust instrument with good sensitivity and excellent imaging characteristics. Other than a door opened once in flight, it has no moving parts. These characteristics and its high degree of redundancy make Ralph ideally suited to this long-duration flyby reconnaissance mission.

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Overview of the earth observing one (eo-1) mission

Cited by 283 publications

References 13 publications

Does the lava lake of Erta ‘Ale volcano respond to regional magmatic and tectonic events? An investigation using Earth Observation data

Does the lava lake of Erta ‘Ale volcano respond to regional magmatic and tectonic events? An investigation using Earth Observation data

A multidisciplinary study of the final episode of the Manda Hararo dyke sequence, Ethiopia, and implications for trends in volcanism during the rifting cycle

Ralph: A Visible/Infrared Imager for the New Horizons Pluto/Kuiper Belt Mission

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