Data - Papers - Software - Miscellaneous
Data
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This section of the library contains data for which members have abandoned all the rights. Contact the web master: idmp.master@entpe.fr if you want to add data to this section.
There are conditions under which data from the IDMP network can be distributed. Members of the IDMP network have the obligation to exchange at least one year of data for free, with other members of the network. There is however, a one year delay period, to enable the collectors own research on his data and a two year delay period, during which data may only be disseminated to members of the network. Each member of the IDMP network is responsible for the dissemination of his data. If you want data that is not available on the server, contact a member by e-mail or regular mail, using the information provided in the Contacts section of the IDMP station description. A member receiving data from another member has to sign a «license agreement» which stipulates that he will not distribute the data to a third party.
The «Guide to recommended practice of daylight measurement» published by the CIE under the code 108:1994, gives a complete description of the format which is used to distribute the data (contact the CIE representatives in your country to get your copy). An important feature of this format is that the measured data is immediately followed by a flag which gives crucial information on the quality of the data. Files are written with ASCII characters separated by white space separators. A file begins with comments preceded by a # sign and a header which describes what is in the file. The header uses measurement codes (3 digit numbers) which are given in the IDMP guide. Each record including the header, begins with the code of the station and ends with a «carriage return» character. Long records can be split by «carriage return» characters into groups of about 10 entry/diagnostic, although this is not recommended, if you want to use a spreadsheet program.
Another format may be used as an alternative to the CIE format described above, it is called the Joule format because it has been used in various European research projects of the Joule programme. It is much easier to read than the CIE format: data is written only on one line, date and time are written using standard formats. However it does not have the quality control flag of the CIE format. Data that is unknown, or that did not pass the quality control tests, is set to -99.
FRANCE Vaulx-en-Velin, FRA2, Lat:45.78 N, Long: 4.93 E
March 1996 (156
ko)
March 1996 (156
ko)
Papers
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You will find below a list of papers related to the use of IDMP data. All members of the IDMP network are invited to contribute. Papers should focus on data acquisition procedures, on daylight and solar radiation availability, and on model development. Whenever possible, an electronic version of the document using the PDF format, will be made available.
Data Acquisition
Daylight Availability
«Daylight availability in Lyon»
D. Dumortier, M. Fontoynont, P. Avouac Bastie, LASH-ENTPE, Lyon, France, European Conference on Energy Performance and Indoor Climate in Buildings, Lyon, France, November 24-26, 1994. 6 pages.In this paper, we present the luminous data that we measured in Lyon, with our IDMP station, from March 1993 to February 1994. Variations of the global and diffuse horizontal illuminances, and of the North, East, South and West vertical illuminances, are analysed using plots of frequency distribution, diagrams of month-hour averages and probability curves. To be useful to designers, all the representations use clock time: winter or summer and provide information for typical office working hours.
Paper
in English (281 ko)«Daylight availability after one-minute measurements for energy conscious design»
S. Darula, R. Kittler, Institute of Construction and Architecture, Slovak Academy of Sciences, Proceedings Conference on Building Physics Symposium, October 4-6, 1995. 6 pages, pp. 243-248.In the climatic zone of Central Europe, exterior radiation and daylight conditions have a considerable impact on the energy performance of buildings. Exterior illuminance levels and the dynamic changes of daylight were scarcely measured and due to unknown conditions, the yearly energy trade-offs either do not take daylighting into account. If the daylighting design is based on the overcast sky conditions, the true year-round performance of the design cannot be predicted. In this paper, we use the data measured every minute in Bratislava, in 1994, to present the frequency of occurrence of exterior horizontal illuminance and irradiance levels, as well as the frequency of occurrence of vertical illuminance levels.
Paper
in English (2.5 Mo)
Solar Radiation Availability
Daylight Modelling
«The relation of sky types to relative sunshine duration»
R. Kittler, Institute of Construction and Architecture, Slovak Academy of Sciences, Building Research Journal, Vol. 45 (1997), N°1, pp. 41-59.Although it is obvious that solar radiation is the only massive source of energy and light on earth, there is almost no trace of this fact in the traditional daylight theory or calculation methodology. Many current methods are based on overcast sky conditions without defined absolute luminance and without any reference to the primary source. It is also curious that in countries where the CIE overcast sky is very seldom in existence, the window design is using this fictitious standard. This paper demonstrates that there exists a strong link between the monthly average sunshine duration and the typical distribution of turbidities and sky types within that month. Therefore standard sky models can be used to express the probability of their occurrence in a particular location during a certain month, season or year.
Paper
in English (1.7 Mo)«A new generation of sky standards»
R. Kittler, S. Darula - Institute of Construction and Architecture, Slovak Academy of Science - R. Perez - Atmospheric Sciences Research Center, State University of New York, Proceedings Lux Europa Conference, Amsterdam, May 11-14, 1997, pp. 359-373.Sky luminance distribution sets containing more than hundred selected cases scanned in Berkeley (California), Tokyo and Sydney were analysed, tested and compared. New analysis methods for deriving the scattering indicatrix and sky gradation functions were applied. The influence of solar altitude, turbidity, luminance and illuminance parameters, as well as typical most frequent daylight conditions were specified and their functional relations modelled. On such base, a new generation of sky standards was defined forming a model sky set applicable in various aspects of energy conscious window design, for daylight calculation methods and computer programs as well as for visual comfort and glare evaluations.
Paper
in English (286 ko)
«Evaluation of luminous efficacy models according to sky types and atmospheric conditions»
D. Dumortier, LASH-ENTPE, Lyon, France, Proceedings Lux Europa Conference, Amsterdam, May 11-14, 1997, pp. 1068-1080.To be valid for a great variety of sites, a luminous efficacy model has to be able to adapt to a wide range of climatic and atmospheric conditions. Many studies focusing on the evaluation of luminous efficacy models, have based their conclusion on annual (sometimes monthly) mean bias and root mean square errors between the models and the measurements, without understanding in detail, what was the behaviour of those models under various sky conditions. In this paper, we use the data measured at the IDMP station of Vaulx-en-Velin to illustrate the variations of the beam, diffuse and global luminous efficacies with the atmospheric aerosol and water vapor content, as well as with cloudiness. We show the performance of various luminous efficacy models during five days representative of different values of turbidity and cloud cover opacity. To cover both cloudless and overcast skies, a luminous efficacy model must rely on two indices. The index characterizing the cloudless sky conditions must take into account the variations in turbidity. None of the models tested do that adequately.
Software
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You will find below the software developed by some of the members to help them in checking, analyzing or plotting the IDMP data. Again, everyone is invited to contribute. If the software is freeware or shareware, you will be able to download it directly from the server. If the software is being sold, you will only be able to download a demonstration version. In that case, if you are interested in the program, you will have to contact the author to get a fully fonctional version. An icon indicates the environment under which the software runs. All software are archived using the standard PKZIP format.
AQCCIE
Quality Control
This is the program you need for quality control. It is based on a comparison between measured and predicted values. It allows to detect significant instrumental errors such as misalignments, better than the procedure described in section 4.3 of CIE publication 108-1994. The dynamic visualization of the comparisons allows to detect rapidly when a problem arrives and with what order of magnitude. AQCCIE is also available directly from the CIE with publication 108-1994. It is shareware.
Documentation
(65 ko)
Program (130
ko)
QCjoule
Quality Control
This Fortran source code will help you to implement the automatic quality control procedure described in section 4.3 of the CIE "IDMP guide" (publication 108-1994). This code has been developed and used for the Joule European research programme called "Dynamic Characteristics of Daylight Data and Daylighting Design in Buildings" (JOUE-0064). It was first written by E. Porter at the Building Research Establishment in Garston, England, then modified to suit our needs at ENTPE. It includes an algorithm developed by P. Littlefair from BRE to compute the diffuse shadow band correction according to sky type.
Source Code (39
ko)
TIMElux 1.0
Data Analysis
TIMElux 1.0 allows to plot time dependent variables in an efficient and compact way. An entire month of IDMP measurements (one or more variables) can be plotted on the size of a A4 sheet. TIMElux is perfect for creating a catalog of your data. It reads Joule files and CIE files. In the latter case, it can even change the color of the curve according to the quality control flag. Thanks to PDF, graphics can be read on any platform and printed using the highest resolution. Get the documentation to discover all the features.
Documentation
(312 ko)Demo Program
(806 ko)
Miscellaneous
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You will find below documents which do not fit into the above categories.
License Agreement
This license states the terms under which data can be exchanged between members of the IDMP network.