Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Juha Suomalainen"'
Publikováno v:
Drones, Vol 7, Iss 1, p 36 (2023)
Positioning of unoccupied aerial systems (UAS, drones) is predominantly based on Global Navigation Satellite Systems (GNSS). Due to potential signal disruptions, redundant positioning systems are needed for reliable operation. The objective of this s
Externí odkaz:
https://doaj.org/article/ee65ee42c29d4d23923891c7aa5d5ed7
Autor:
Na Wang, Juha Suomalainen, Harm Bartholomeus, Lammert Kooistra, Dainius Masiliūnas, Jan G.P.W. Clevers
Publikováno v:
International Journal of Applied Earth Observations and Geoinformation, Vol 96, Iss , Pp 102276- (2021)
Unmanned Aerial Vehicle (UAV)-based measurements allow studying sun-induced chlorophyll fluorescence (SIF) at the field scale and can potentially upscale results from ground to airborne/satellite level. The objective of this paper is to present the F
Externí odkaz:
https://doaj.org/article/5f2a8720048544a28adf8f5fc9d1e1af
Publikováno v:
ISPRS International Journal of Geo-Information, Vol 4, Iss 4, Pp 2792-2820 (2015)
Grassland ecosystems cover around 40% of the entire Earth’s surface. Therefore, it is necessary to guarantee good grassland management at field scale in order to improve its conservation and to achieve optimal growth. This study identified the most
Externí odkaz:
https://doaj.org/article/334107a4b38d47d88e94432fee6e5453
Autor:
Juha Suomalainen, Niels Anders, Shahzad Iqbal, Gerbert Roerink, Jappe Franke, Philip Wenting, Dirk Hünniger, Harm Bartholomeus, Rolf Becker, Lammert Kooistra
Publikováno v:
Remote Sensing, Vol 6, Iss 11, Pp 11013-11030 (2014)
During the last years commercial hyperspectral imaging sensors have been miniaturized and their performance has been demonstrated on Unmanned Aerial Vehicles (UAV). However currently the commercial hyperspectral systems still require minimum payload
Externí odkaz:
https://doaj.org/article/e470fef1c6724772bd3dd14b27069199
Autor:
Marston Héracles Domingues Franceschini, Harm Bartholomeus, Dirk Frederik van Apeldoorn, Juha Suomalainen, Lammert Kooistra
Publikováno v:
Remote Sensing, Vol 11, Iss 3, p 224 (2019)
Assessment of disease incidence and severity at farm scale or in agronomic trials is frequently performed based on visual crop inspection, which is a labor intensive task prone to errors associated with its subjectivity. Therefore, alternative method
Externí odkaz:
https://doaj.org/article/53bbcc1e26da4734aa95db91fea50cf5
Autor:
Juha Suomalainen, Teemu Hakala, Raquel Alves de Oliveira, Lauri Markelin, Niko Viljanen, Roope Näsi, Eija Honkavaara
Publikováno v:
Remote Sensing, Vol 10, Iss 12, p 2068 (2018)
In unstable atmospheric conditions, using on-board irradiance sensors is one of the only robust methods to convert unmanned aerial vehicle (UAV)-based optical remote sensing data to reflectance factors. Normally, such sensors experience significant e
Externí odkaz:
https://doaj.org/article/8271bbe3c68d4d4e822f95acceaaf5a2
Autor:
Eleanor R. Thomson, Yadvinder Malhi, Harm Bartholomeus, Imma Oliveras, Agne Gvozdevaite, Theresa Peprah, Juha Suomalainen, John Quansah, John Seidu, Christian Adonteng, Andrew J. Abraham, Martin Herold, Stephen Adu-Bredu, Christopher E. Doughty
Publikováno v:
Remote Sensing, Vol 10, Iss 10, p 1532 (2018)
The leaf economic spectrum (LES) describes a set of universal trade-offs between leaf mass per area (LMA), leaf nitrogen (N), leaf phosphorus (P) and leaf photosynthesis that influence patterns of primary productivity and nutrient cycling. Many quest
Externí odkaz:
https://doaj.org/article/3ebcff11fd934103964906210a682dc8
Autor:
Aku Riihelä, Eetu Puttonen, Juha Suomalainen, Teemu Hakala, Terhikki Manninen, Jouni I. Peltoniemi
Publikováno v:
Remote Sensing, Vol 2, Iss 8, Pp 1918-1940 (2010)
Land surface hemispherical albedos of several targets have been resolved using the bidirectional reflectance factor (BRF) library of the Finnish Geodetic Institute (FGI). The library contains BRF data measured by FGI during the years 2003–2009. Sur
Externí odkaz:
https://doaj.org/article/67c8c28847b8405982e88f023807934e
Autor:
Eero Ahokas, Juha Suomalainen, Jouni Peltoniemi, Teemu Hakala, Eija Honkavaara, Lauri Markelin
Publikováno v:
Remote Sensing, Vol 2, Iss 8, Pp 1892-1917 (2010)
Reliable and optimal exploitation of rapidly developing airborne imaging methods requires geometric and radiometric quality assurance of production systems in operational conditions. Permanent test sites are the most promising approach for cost-effic
Externí odkaz:
https://doaj.org/article/001b16a3a7914e3a883581a9b3127b1c
Autor:
Ruizhi Chen, Juha Hyyppä, Teemu Hakala, Esa Räikkönen, Sanna Kaasalainen, Juha Suomalainen, Yuwei Chen
Publikováno v:
Sensors, Vol 10, Iss 7, Pp 7057-7066 (2010)
Recent advances in nonlinear fiber optics and compact pulsed lasers have resulted in creation of broadband directional light sources. These supercontinuum laser sources produce directional broadband light using cascaded nonlinear optical interactions
Externí odkaz:
https://doaj.org/article/d4905859154f4e209f8a32a0e3b8d076