Experiment summary:
Experiments took place during the summer of 2000 on the dates in the following
table. Four digit labels (“mmdd”, i.e. two digits for the month and two for
the day) are often used in file or directory names and are given alongside
each date.
Date Label (“mmdd”)
02 Jun 2000 0602
06 Jun 2000 0606
21 Jun 2000 0621
19 Jul 2000 0719
25 Jul 2000 0725
02 Aug 2000 0802
15 Aug 2000 0815
Summary of files in this archive:
This archive contains the main files describing the motion of the targets
attached to the wheat plants and simultaneous wind velocity data.
Pre-processing has been carried out to synchronize the video and wind data,
to obtain coherent trajectories for each target tracked, and to present the
data in a common reference system.
Directory File Comments:
docs DVA data 2000 summary.xls Summary of the anemometer data
processing parameters and key
results from the experiments
DVA data 2000.doc Word document describing the digital
vane anemometer (DVA) data
processing
sample video&DVA data.doc Describes sample data for target
trajectories and the wind data.
vidreport2.pdf Technical report documenting
the videogrammetry technique
used to measure the target
positions, calibrate the
system, and form coherent
trajectories.
Wheat video expts 2000.doc Documents much of the data
pre-processing to allow it to
be repeated if necessary from
the original video files.
Wheat video expts 2000.xls Tabulates data to be used with
Wheat video expts 2000.doc,
Contains many parameters used
to process the video data.
validation wheat video validation.doc Documents basic end-to-end validation
of the trajectory measurements.
Seynat_trajectories.zip File of all the 1 min trajectories
from the analysis of Seynat (2000)
used to compare with 2006 data for
validation of the technique (and
for independent analysis). When
unzipped gives 6 directories for
dates 6/6/00 to 15/8/00 with
ASCII files of target trajectories.
mmdd
Table 1. Overview of directory structure and contents for this archive.
Notes
-----
* Wind data are not synchronized with video data for 2 June
+ Data for two video segments (a,b) are available for 2 Aug
Table 2. Summary of contents of each of the experiment directories.Observations of wheat motion in wind were made through the later part of the
growing season (June - August) for wheat on Cranfield Airfield in 2000. The
data collected include stereo videogrammetric measurements of the motion of
small targets attached to wheat plants along with simultaneous local wind
velocity measurements. The experiments and their analysis have been described
in the following publications:
Seynat, C., Quantification of the effect of wind driven wheat motion on SAR
interferometric coherence. PhD thesis, Cranfield University, 2000
Hobbs, SE, Seynat, C, and Matakidis, P, Videogrammetry: a practical method for
measuring vegetation motion in wind demonstrated on wheat. Agricultural
and Forest Meteorology, 2007 (doi: 10.1016/j.agrformet.2006.12.008)
This archive contains the main data files for each day of the experiments
together with some documentation for the experiments. There should be enough
information so that users can analyse the data for their own requirements.
EACH DIRECTORY IS PROVIDED AS ONE ZIPPED FILE (E.G. docs.zip, validation.zip,
0602.zip, CREATED USING 7-ZIP, AN OPEN SOURCE PROGRAM AVAILABLE FROM WWW.7-ZIP.ORG).
THE ZIPPED FILES SHOULD BE READABLE BY WINZIP, WINRAR, 7-ZIP AND SIMILAR PROGRAMS
