First results from the disaster monitoring constellation (DMC)

Curiel, Alex da Silva; Boland, Lee; Cooksley, John; Bekhti, Mohammed; Stephens, Paul; Sun, Wei; Sweeting, Martin

doi:10.1016/j.actaastro.2004.09.026

Cited by 57 publications

(13 citation statements)

References 1 publication

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“…The Bilsat-1 is exceptional because it acquires data in four spectral channels including blue band with Multispectral Imaging System. The SLIM6 spectral response is determined by the overall combination of all of the optical elements, the spectral filters, and the detector response (Sweeting and Chen, 1996;Da Silva Curiel et al, 2005;Underwood et al, 2005;Crowley, 2008). The spectral filter characteristics include the nominal wavelength location of the SLIM6 spectral bands from visible wavelength to NIR, nominal instantaneous field-of-view size and sub-satellite GSD resolution.…”

Section: The Dmc Satellitesmentioning

confidence: 99%

A comparative assessment of UK‐DMC and Landsat‐7 ETM+satellite data

Ogunbadewa

2013

Sensor Review

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Purpose -The purpose of this study is to evaluate the potential of the DMC satellite data as suitable alternative to Landsat-7 ETMþ satellite data sets in view of the aging conditions, the failure of the Scan Line Corrector (SLC) and resulting scan line anomaly within the Landsat-7 ETMþ data sets. Design/methodology/approach -The DMC and Landsat-7 ETMþ satellite data were compared by obtaining quantitative parameters such as; spatial, geometric, spectral, radiometric properties from coincident date images of the two satellite sensors, while inter-relationship between DMC and Landsat-7 ETMþ satellite data were established by deriving sensor inter-calibration from linear regression equation. Findings -The result shows that the performances of UK-DMC match well with Landsat-7 ETMþ and the accuracy of the UK-DMC with respect to spatial, geometric properties. The frequency of DN distribution in each waveband for the two sensors and a pair-wise relationship between the DN of selected targets was established using linear regression equation with coefficient of determination (R 2 ) values that range from 0.92 to 0.95. These are adequate for data integration of the UK-DMC and Landsat-7 ETMþ sensors, and indicate that UK-DMC can be used as a replacement for Landsat-7 ETMþ and can provide a suitable platform for multi-temporal and multi-sensor approach that is required for the study of environmental dynamics.Research limitations/implications -The challenge in this study is that information on DMC sensor calibration and radiometric parameters such as time-dependent change in the data derived from pre-flight measurements, in-flight calibration and ground-based calibration data were not available at the time of this study. Therefore, absolute radiometric correction of converting the digital number (DN) recorded by the sensor to spectral radiance detected by the sensor using sensor-specific calibration parameters was not possible. The suitable alternative is to use spectrally invariant targets for relative radiometric correction of DN to DN pair wise pixel technique and selecting similar targets on the images.Practical implications -This study shows that a suitable platform for multi-temporal and multi-sensor approach that is required for the study of environmental dynamics can be provided. Social implications -The issue of climate change was mentioned in this manuscript because satellite sensors that were used previously for climate change (multi-disciplinary approach) does not have the temporal dynamics of daily coverage (temporal) and spatial resolution like the DMC satellites while there is usually a trade-off between temporal and spatial resolution. The DMC satellites have got the exceptional capability of daily temporal and medium spatial resolution that can be suitable for monitoring climate change. That is why in this study investigation was carried out on the unique properties of the DMC satellites by making comparative assessments Landsat-7 ETMþ . Originality/value -The originality/value of this paper lies on the fact...

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Section: The Dmc Satellitesmentioning

confidence: 99%

A comparative assessment of UK‐DMC and Landsat‐7 ETM+satellite data

Ogunbadewa

2013

Sensor Review

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“…AlSAT-1, the first of these satellites, was launched in November 2002. 8 The UK-DMC satellite, which carries the Cisco router, was launched alongside its sister satellites (BILSAT-1 and NigeriaSat-1) in September 2003. The Beijing-1 satellite joined the constellation in October 2005.…”

Section: Extending the Internet To Orbitmentioning

confidence: 99%

Using Internet nodes and routers onboard satellites

Wood

Ivancic

Hodgson

et al. 2007

Satell Commun Network

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An Internet router was integrated into the UK-DMC remote-sensing satellite as a secondary experimental payload. This commercial product has been orbiting in space for over three years. We describe the integration of the router and satellite and the successful on-orbit testing of the router, which took place using the Virtual Mission Operations Center (VMOC) application as part of a larger systems internetworking exercise. Placing this Cisco router in Low Earth Orbit (CLEO) onboard a small satellite is one step towards extending the terrestrial networking model to the near-Earth space environment as part of a merged space-ground architecture.

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“…Through a more dramatic instrument miniaturization (size and power requirement reduction) whilst preserving the bulk of its ability to collect useful imaging data, it would become possible to integrate, at a relatively lower-risk, low-cost MWIR imagers as secondary payloads into existing Earth observation constellations replenishment programs. One example being the four-(soon to be five) Disaster Monitoring Constellation, flown by Surrey Satellite Technology Limited (SSTL) currently providing medium GSD (32 m) fiill daily coverage of the Earth in the visible and near infrared wavebands at a cost below that of a single traditional Earth observation (EO) satellite mission [8]. As the constellation ages or as new members join the international DMC consortium, additional EO miaosatellites could be added eadi taking incremental advantage of advancements in low-cost imaging technologies.…”

Section: The Microsatellite Constellation Nichementioning

confidence: 99%