Message Board Thread - "One of the largest thermographic projects in Europe"

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One of the largest thermographic projects in Europe Ramiro Álvarez 4/15/2009
"On the nights of the 2nd, 16th, 17th and 18th March of 2009, EUROSENSE executed
four flights covering the city of Antwerp and 20 surrounding municipalities for
the creation of a thermographic map. During these flights, personnel of
EUROSENSE and the municipalities measured also ground temperatures on several
locations in the project area and volunteers were asked to fill inquiries and
measure temperatures under the roofs.

Covering an area of approx. 700 km², it consists of one of the largest
thermographic projects in Europe!

The thermographic map, foreseen to be ready in early summer of 2009, will give
an indication to the inhabitants of Antwerp and surrounding municipalities
regarding the state of their roof insulation. By means of an easy-to-follow
interpretation key and a corresponding interpretation legend, the inhabitants
themselves can check if potential problems exist in the roof insulation of their
building. Actions can be undertaken to improve their roof insulation, with the
help of subventions from the city or community. The achievement of the
requirements following the Kyoto-protocol are again one step closer..."

http://www.eurosense.com/News.aspx?lc=en&CatID=85&nid=9

Via the following link, you can find a movie report from the Flemish Television (VRT) regarding the ground measurements:
http://www.deredactie.be/cm/de.redactie/mediatheek/1.490419?mode=popupplayer

Kind regards,
--
Ramiro Álvarez Clavero
Remote Sensing Service
http://webs.uvigo.es/ramiro
Center for Support of Scientific and Technological Research
Vigo University
 
Re:One of the largest thermographic projects in Europe Doctir bob 4/15/2009
IR flyovers started in the U.S. in the late 1970’s. We learned one must be extremely judicious when interpreting data from these types of flyovers. ERIM (Environmental Research Institute of Michigan) performed a city-wide flyover. Their initial findings were that older homes’ attics were less well insulated than the newer homes. When they more carefully analyzed their data the conclusion was steep pitched roofs appear warmer than shallow pitch roofs due to differences in their view factors. For this particular city, the older homes had steep roofs, newer homes shallower pitches. They sent summer students into the attics of many of these homes to verify their initial conclusions about newer homes being better insulated and found that to be incorrect. When view factor effects were incorporated into their analyses, they got high correlation with the IR data. In this era attics were mostly ventilated, as many still are today. Attic ventilation thermally decouples the roof surface from the attic floor to a large extent. This isn’t to say you can’t find poorly insulated homes with a flyover. It is to say you better consider all the variables.
 
Re:One of the largest thermographic projects in Europe Ramiro Álvarez 4/16/2009
Doctir bob wrote:
vers started in the U.S. in the late 1970’s. We learned one must be extremely judicious when interpreting data from these types of flyovers. ERIM (Environmental Research Institute of Michigan) performed a city-wide flyover. Their initial findings were that older homes’ attics were less well insulated than the newer homes. When they more carefully analyzed their data the conclusion was steep pitched roofs appear warmer than shallow pitch roofs due to differences in their view factors. For this particular city, the older homes had steep roofs, newer homes shallower pitches. They sent summer students into the attics of many of these homes to verify their initial conclusions about newer homes being better insulated and found that to be incorrect. When view factor effects were incorporated into their analyses, they got high correlation with the IR data. In this era attics were mostly ventilated, as many still are today. Attic ventilation thermally decouples the roof surface from the attic floor to a large extent. This isn’t to say you can’t find poorly insulated homes with a flyover. It is to say you better consider all the variables.
Yes I agree with you that one must consider all variables, in fact we (Uvigo) were last year collaborating with the DESIREX 2008 project and there was a lot of measurements from different sensors to avoid "incorrect conclusions" (ASTER, AHS airborne scanner, FLIR and NEC cameras, field spectroradiometers, meteorological stations, etc.

You can see the "Qualitative" thermogram of an area of Madrid here:

http://www.esa.int/images/AHS_image_sampe_color_flat_H.jpg

Kind regards,
--
Ramiro Álvarez Clavero
Remote Sensing Service
http://webs.uvigo.es/ramiro
Center for Support of Scientific and Technological Research
Vigo University
 


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