03 November 2011
The desert lives – the festival is in full swing!
The tents and vehicles are clearly visible in this radar image. The artificial structures have been coloured to make them more easily visible; the actual radar image is black and white.
DLR (CC-BY 3.0).
Twenty-two days before the festival – not much going on …
Black Rock Desert looks fairly desolate just 22 days before the festival.Black Rock Desert, a good three weeks before 'Burning Man'. Man-made trails on the festival grounds are clearly visible; they appear darker than the undisturbed soil.
Eleven days before the festival – the first signs of civilisation
A number of vehicles and structures are already visible a few days before the start of the festival. The time interval between image acquisitions makes changes on Earth's surface apparent.
Traffic jam in the desert
Traffic jam on the main access road; artificial structures reflect back a large proportion of the radar signals and are therefore easy to distinguish.
The festival from above – order among chaos
From above, this town of tents resembles a giant spider web.Details of the festival area can be seen in this image, also acquired by satellite. Chaos dominates each of the plots, but the roads between them are kept clear.
Viewed from above, the US 'Burning Man' festival resembles a spider web. The structure laid out on the site for this festival looks very much like a small town. In October and September 2011, the TerraSAR-X radar satellite, operated by the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR), acquired some impressive images of the festival and its setup process.
Seen from space, the plots in the campsite, intersected by roads and footpaths, can be discerned particularly well. DLR researchers are observing planet Earth with the radar satellite TerraSAR-X. "One of the unique capabilities of TerraSAR-X is to reveal changes on the Earth's surface that occur over an extended period of time," explains Mission Manager Stefan Buckreuß from the DLR Microwaves and Radar Institute. From these images it is possible to identify how 'Tent City' arose in a semicircle around its central point. Every 11 days at 06:57 local time, TerraSAR-X was able to observe the festival from exactly the same viewing angle. To make this possible, the satellite orbits Earth at an altitude of 515 kilometres in a Sun-synchronous dusk/dawn orbit, causing it to cross the Equator at almost a right angle. Earth continues to rotate beneath it, meaning that the satellite is able to scan its entire surface every 11 days.
Small details despite great altitude
Despite the great altitude of its orbit, the satellite is even able to identify individual cars. "Artificial structures such as tents and vehicles present themselves almost at right angles to the radar, which means that they reflect the signal straight back to the satellite," explains Buckreuß. They are easily identifiable in an otherwise natural environment. "We have also coloured them, so that they can be seen well," explains the Mission Manager – referring to the red and yellow dots in the image. The white areas are part of the neighbouring mountains, which reflect a particularly high proportion of the radar signals back to the satellite. In contrast, flat ground only reflects a very small proportion of the signal, so it appears as dark grey; the majority of the signal is diffusely scattered. Smooth, man-made structures such as roads reflect radar signals away from the satellite and appear black in the image.
'Burning Man' is no ordinary festival. There are no large stages, nor are there any big bands; nevertheless, it is extremely popular. More than 50,000 people gather in the Nevada desert over the course of the six days in early September when it is held. Every year, they establish themselves in a new location to seek freedom and self-reliance. Nevada's dry Black Rock Desert comes to life some weeks before the actual start of the festival. It ends with the burning of a larger-than-life effigy made of wood and straw, from which the festival gets its name.
The TerraSAR-X mission
TerraSAR-X is the first German satellite manufactured under what is known as a Public-Private Partnership between the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) and Astrium GmbH in Friedrichshafen. The satellite travels around the Earth in a polar orbit and records unique, high-quality X-band radar data about the entire planet using its active antenna. TerraSAR-X works regardless of weather conditions, cloud cover or the absence of daylight and is able to provide radar data with a resolution down to one metre.
DLR is responsible for using TerraSAR-X data for scientific purposes. It is also responsible for planning and implementing the mission as well as controlling the satellite. Astrium built the satellite and shares the costs of developing and using it. Infoterra GmbH, a subsidiary company founded specifically for this purpose by Astrium, is responsible for marketing the data commercially.
Last modified:03/11/2011 11:28:59
How can I buy a print of this, or download a high rez image?
The last image in that set is not from 2011, it is from 2010. Are the other images from 2010 as well?
Could you explain the way to produce those smart SAR pictures ? Are they HSI colored composition using polarimetric information ? Or other ?Regards.
what day and time was this taken?thanks
The last of the 5 images (daytime) is from 2009, not 2011.
The comment about chaos within the blocks isn't quite right. Many camps were obsessively planned, for example Love Potion which included a set of 24 connected Yurts made of insulation material they called "Yurtopolis":http://www.lovepotioncamp.com/camp-bm-2011.php
Somewhat inaccurate information. Duration is longer and some stages are are quite sizeable.
@Mark Atwood Did you download the 1,63 MB version (you'll find it in the upper right of the image gallery).
@Patrick The coloring is based on a local statistics filtering of the detected image (HH, single polarization) and indicates the surface roughness as seen by the radar. The color channels are assigned as follows:Red – local standard deviationGreen – local mean valueBlue – scaled difference of local standard deviation and local mean valueBest regards, Stefan
@Clare All images were taken in 2011, starting July 7th at an interval of 11 days. Best regards, Stefan
@Mark Atwood The first image is now available in higher resolution.
Burning Man takes place at the end of August, beginning of September. Not in October.