Bridget on Mars
From the beginning it was clear that the Atacama is very similar to Mars visually, but not until you remove the blue of the atmosphere from the photos you realise just how true it is. The following slightly modified images were made by Elie showing of Bridget on this Martian terrain.
Sweeping the desert
Sweeping the dusty Atacama might seem like a futile effort but these sweepers are not removing dust, but removing tyre tracks and footprints, all to preserver the site and not to give out any clues to RCC by accident.
Bridget on the field
Every day Bridget needs to get down from the Beast and take a long traverse to the end of the previous day’s run which is the start of the day’s run. Equipped with all the instruments once again Bridget is heading out. Once in position she will receive the plan from RCC just like the download would happen to a Mars rover and start executing the tasks autonomously.
During the past few days the preparations for the actual trial, which started a week ago, have proceeded well. A number of sites in the area in the Atacama desert where part of the team is located, have been visited. Based on guidance provided by Chilean geologist Prof. Guillermo Chong the team’s geologist Derek Pullan of the University of Leicester has been exploring the area looking for sites which are analogous to those on which the instruments, which used in the trial, would be deployed on Mars. Based on this information a consensus was reached within the local team on the choice of the site, which they called “SAFER valley”. On Sunday night a digital elevation map, acquired in the field by a UAV, was sent to the Remote Control Centre (RCC), simulating orbital imagery of the rover’s surrounding terrain on Mars. For this campaign the RCC is located at the Catapult Facility in Harwell, UK.
The instruments used in this test support the search for good locations for collecting subsurface samples on Mars which may contain signs of past or present life.
The PanCam (Panoramic Camera) instrument has been designed to search for textural information on rocks and other information that will help in revealing the geological characteristics of the Martian environment.
This instrument will provide stereo and 3D imagery of the terrain around the Rover. In particular, the Panoramic Camera will be used:
• To help locate the landing site and Rover position with respect to local geographical references;
• To provide the geological context of the sites explored by the Rover;
• To support the selection of the best sites to carry out exobiology studies;
• To study properties of the atmosphere and of other variable phenomena.
PanCam will also support the scientific measurements of other Rover instruments. It will capture high-resolution images of locations that are difficult to access, such as craters or rock walls. On the ESA rover of the 2018 ExoMars mission PanCam will monitor the sample from the drill before it is ingested and crushed inside the Rover, where the Analytical Laboratory instruments will perform a detailed chemical, physical, and spectral analysis. For the field trial a PanCam emulator, called AUPE-2, is used, which was developed by Aberystwyth University.
Vision Processing in 3D of PanCam data is an essential component of mission planning and scientific data analysis. Standard ground vision processing products will be digital terrain maps, panoramas, and virtual views of the environment. A vision ground processing workflow has been performed by the PanCam 3D Vision Team, under coordination of Joanneum Research, Austria.
The CLUPI (Close-up Imager) instrument, developed by the Space Exploration Institute in Switzerland, is a robotic substitute to one of the most useful instruments of the geologist field: the hand lens. Imaging of rocks surfaces, soils and wind drift deposits at high resolution is crucial for understanding the geological context of any site where a rover may be active on Mars. CLUPI is optimized for a scientific objective: the characterization of rock outcrops from 10 cm to infinity, and the observation of the cored sample.
The WISDOM ground penetrating radar developed by the LATMOS research lab of the Centre National de la Recherche Scientifique, France, will provide a detailed view of the shallow subsurface structure of Mars by sounding the upper layers of its crust. Unlike traditional imaging systems or spectrometers, which are limited to studying the visible surface, this radar will access what lies beneath.
WISDOM will provide the three-dimensional geological context of the terrain covered by the Rover. This additional perspective is vital for a better understanding of the planet’s evolution, and the impact of its changing geology and climate on past and present habitability.
WISDOM’s main science objectives are:
• To investigate the three-dimensional geology and geological evolution of the landing site, and provide information on the general physical characteristics of local rocks, the rock layering and structure;
• To characterise the electromagnetic properties of Martian soil in order to map the scale of diversity in the shallow subsurface; and
• To observe the local distribution of well-compacted, sedimentary deposits that may have been associated with a water-rich environment in the past.
The roving vehicle, on which the prototype instruments have been installed on tuesday morning is provided by Astrium Stevenage, UK, and is called Bridget. The software which controls the activities of the rover and payloads onboard and a counterpart for the remote definition of these activities for this trial has been developed by SCISYS, Bristol, UK.
Although this test is not part of the ExoMars mission development and the industrial team differs from the one building the flight rover, in this field trial a procedure for operating the ExoMars rover mission will be verified and possibly optimized in practice. On Monday evening, before the instrumented Bridget rover was in the field a set of PanCam images was sent to the RCC. Based on this data combined with the digital elevation map received previously the remote control team had to make a first decision about the path to be executed by the rover on Tuesday. On Tuesday morning the Local Control Centre was set up, the rover was deployed in the field and the instruments were installed on the rover, while the RCC uploaded the desired path and the first program of data acquisition activities. Some debugging and manual interventions were needed during this initial phase. Nevertheless, after a long working day in the desert until sunset, the collected instrument data were set to the RCC.
As if dust devils wouldn’t be enough, we have also spotted a bear in the distance about 100 meters in the direction Bridget is heading!
While the picture only shows a play of shadows we dedicate this post to the threatened spieces that live in South America in the Andes Mountains the spectacled bear: http://en.wikipedia.org/wiki/Spectacled_bear
RCC last night
RRC team hard at work generating the new plans:
RCC team talking to Sev from LCC, no critical data is shared just a quick catch-up:
Because Chile is 4 hours behing the UK the RCC crew has to has to stay late to make the most of the day. Luckily they are not without supplies:
After yesterday’s dust devil we have rebuilt the LCC this morning. Special thanks to Raul for providing the new hopefully more wind resistant tent.
This gallery contains 7 photos.
During the SEEKER trials last year we experienced strong winds, but not like this. A huge dust devil hit the LCC square. Elie managed to photograph the devil after it passed our camp: And what it left behind: Luckily to the well built camp and layout taking strong winds into account (using cars as windbreak), […]
This is the RCC
We have just completed traverse “sol3”, meaning the path we have done up to now would have taken 3 Martian days on Mars. We are now in stand-by waiting for the RCC team to analyse the results and upload the new plan.
For some things you need to be out in the field. The following event probably wouldn’t have happened in a lab environment. A flat rock which was easily traversable by Bridget suddenly flipped when Bridget’s wheel went over it close to one side. This greatly increased the height of the rock. Luckily Bridget had enough ground clearance to safely proceed but this scenario is definitely something to think about when driving over similar rock on Mars.