Wednesday, 31 July 2013

More action from Australia

Tuesday saw us back at Karawatha Forest park to collect SALCA data along side the Riegl VZ400 and Faro instrument. In addition to the laser scanner data the the team are collecting field spectrometer data to characterise the spectral properties of leaves and bark. Sampling the upper canopy requires the use of an oversize slingshot which propels bean bag and string into the canopy; the bean bag wraps around branches and these are then pulled down for sampling - sometimes it works, and sometimes it goes wrong!

Steve Hancock and Andrew Burt (University College London) attempt to untangle the sling-shot string!
Rachel and Mat Disney (University College London) use an ASD Fieldspec to measure leaf reflectance and transmittance
 Short clip of SALCA in action - the noise of the generator wins over the birdsong for most of the clip

Monday, 29 July 2013

SALCA goes to Australia

The SALCA team is in Brisbane, Australia, taking part in an international terrestrial laser scanner inter-comparison study. The experiment has been organized as part of the TLS International Interest Group (TLSIIG) formed at Silvilaser in Vancouver last September. We are joined teams from the US and Australia to compare the data from a range of different TLS instruments for measuring forest canopy structure at two sites close to Brisbane.

The University of Boston and University of Massachusetts have brought the Dual Wavelength Echidna Lidar (DWEL) and the short range but handy Canopy Biomass Lidar (CBL), the Queensland Government Department for Science, Innovation, Technology, Innovation and the Arts (DSITIA) and TERN (University of Queensland) a Riegl 400VZ, and the University of Southern Queensland a Faro Focus 3D.

First obstacle overcome: SALCA makes it in one piece to Australia much to the relief of Mark, Steve, Rachel and Lucy
After spending a day carrying out calibration measurements in the lab we collected the first field data today at Karawatha Forest Park just south of Brisbane. The plots we are using are part of the Australian Terrestrial Ecosystem Research Network (TERN) and the field experiments are coordinated by John Armston (DSITIA) and Glen Newnham (CSIRO). They have done a great job and we had over 30 scientists in the field today.

Another first for the SALCA team: Lucy looks pleased after collecting the first dual wavelength TLS data in the southern hemisphere!
Glen Newnham (CSIRO) takes a close look at SALCA
More on the TLSIIG experiments from TERN here