posted on 2010-01-01, 00:00authored byR Devadas, S Jones, G Fitzgerald, I McCauley, B Matthews, E Perry, M Watt, J Ferwerda, Abbas KouzaniAbbas Kouzani
Water and Nitrogen (N) are critical inputs for crop production. Remote sensing data collected from multiple scales, including ground-based, aerial, and satellite, can be used for the formulation of an efficient and cost effective algorithm for the detection of N and water stress. Formulation and validation of such techniques require continuous acquisition of ground based spectral data over the canopy enabling field measurements to coincide exactly with aerial and satellite observations. In this context, a wireless sensor in situ network was developed and this paper describes the results of the first phase of the experiment along with the details of sensor development and instrumentation set up. The sensor network was established based on different spatial sampling strategies and each sensor collected spectral data in seven narrow wavebands (470, 550, 670, 700, 720, 750, 790 nm) critical for monitoring crop growth. Spectral measurements recorded at required intervals (up to 30 seconds) were relayed through a multi-hop wireless network to a base computer at the field site. These data were then accessed by the remote sensing centre computing system through broad band internet. Comparison of the data from the WSN and an industry standard ground based hyperspectral radiometer indicated that there were no significant differences in the spectral measurements for all the wavebands except for 790nm. Combining sensor and wireless technologies provides a robust means of aerial and satellite data calibration and an enhanced understanding of issues of variations in the scale for the effective water and nutrient management in wheat.
History
Pagination
187 - 192
Location
Vienna, Austria
Open access
Yes
Start date
2010-07-05
End date
2010-07-07
ISSN
1682-1777
Language
eng
Publication classification
E2 Full written paper - non-refereed / Abstract reviewed; E Conference publication
Copyright notice
2010, ISPRS
Editor/Contributor(s)
W Wagner, B Székely
Title of proceedings
ISPRS 2010 : Proceedings of ISPRS Technical Commission VII Symposium