Deepak Gautam recently published an article at American Society of Civil Engineers, Journal of Surveying Engineering

This article compares the position and orientation accuracy of two MEMS-based IMU/GNSS (Advanced Navigation Spatial Dual, and Xsens MTi-G-700). The IMU/GNSS under investigation were mounted along with a FOG-based tactical grade IMU (Novatel SPAN). Ground-based experiments were performed at oval sport field of University of Tasmania to assess the accuracy of the two IMUs in reference to the SPAN IMU. Results show that post-processed position solution of accuracy better than 3 cm is readily achievable on a dynamic platform. MEMS-based IMU achieved roll and pitch angle accuracy within a degree. One of the key findings of this study was that MEMS-based IMU with dual antennae outperformed the tactical grade IMU in determining the absolute heading.

The study determined the suitability of the IMU/GNSS to measure the position and orientation of a UAS-mounted point measuring spectroradiometer. The article can be found at the DOI: Feel free to contact corresponding author Deepak Gautam ( for a copy of the article.

“Cherry picking” avocados – Upscaling fluorescence measurements of avocado canopies from a cherry picker

Juliane Bendig, Deepak Gautam and Richard Ballard teamed up with Rhys Wyber (PhD candidate, University of Wollongong) to investigate the effect of scaling Laser Induced Fluorescence Transient (LIFT) and Sun-Induced chlorophyll Fluorescence (SIF) measurements from individual leaves to canopy scale. The fieldwork was carried out in an avocado orchard on…

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Antarctic Dragon-Skin Ice

TerraLuma member Guy Williams reports on a rare sighting of dragon-skin ice during a voyage to the Ross Sea. Of course, his fixed-wing UAS played an important role in documenting this extraordinary phenomenon. Read more about it in on IMAS news and watch his great video published on abc news.

Image Source: IMAS news

GIF: Scientists send a drone out over the ice (Source: abc news)

Drones in science: Rising beyond pretty pictures

Drones are revolutionising environmental science. Four scientists explain how they are using drones, what challenges they face and how the technology is changing our understanding of the world around us. Read more about it here: ABC Science News

Image of coral and algae in the Great Barrier Reef taken using a standard DSLR camera shows patches of live coral (pink) and algae (green). (Karen Joyce)