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Trustory Mont Blanc En:Layout 1 Leica Geosystems TruStory Measuring Mont Blanc: a human and technical adventure Challenge - Working with GNSS in difficult conditions - Transportation of the equipment to the summit without any assistance - Calculation of a baseline with a delta height of 4’000m Timeframe September 2009 Objectives Determination of the elevation of Mont Blanc using all methods (RTK, NRTK, post-processing for at least 1 hour) Location Mont Blanc, France Every two years, the chartered Manager at Leica Geosystems land surveyors of the French France, it is possible to deter- Départment of Haute-Savoie mine the elevation and to create and Leica Geosystems measure a 3D model of the ice sheet. the elevation of Mont Blanc, The 5th measurement expedition the roof of Europe, the famous to this superb experimentation mountain straddling the site confirmed the reliability and Franco-Italian border. robustness of the Leica SmartRover real time GPS, which The aims of these technical and provided measurements to with- human expeditions are to provide in one centimeter under unusu- the general public with an unus- ally difficult circumstances (alti- ual insight into the profession of tude, cold, precise calculation the chartered land surveyor, to with a large altitude difference, test the reliability and precision etc). The team was hardly sur- of Leica Geosystems GPS equip- prised, since this was the 4th ment in difficult conditions, and Leica Geosystems instrument to two cameramen. Leica Geosys- to contribute to helping the sci- be subjected to such extreme tems France was represented by entific community provide ans- conditions, following in the foot- the Product Manager Farouk wers to questions concerning steps of the Leica GPS500 in Kadded and the After-Sales variations in climate. Measuring 2001 and 2003, the Leica Technician Olivier Mauger. the summit of Mont Blanc on a GPS1200 in 2005, and the Leica Bernhard Richter, Director of regular basis provides glaciolo- SmartStation in 2007. GPS/GNSS, and Leica System gists, geographers, nivologists 1200 Product Manager Alastair (snow experts) and meteorolo- Farouk Kadded’s log book Green, travelled from the Leica gists with data on the variations The team consisted of seven Geosystems head office in Heer- of a glacier at its source. chartered land surveyors, repre- brugg to join the team. With GPS measurements taken sentatives of their professional at the summit under the super- organization; three elected rep- Saturday 12th September 2009 vision of Farouk Kadded, Product resentatives of the region; and Everybody made the climb by the usual route except my colleagues 2 for the Goûter team). tacting the helicopter pilot so from Heerbrugg and myself. We 06:45 – The first roped parties that he can fly over the summit made for the summit via the of the Goûter team arrive at the and take some aerial views of Aiguille du midi and the Refuge summit. the measurement operation. des Cosmiques before crossing 07:25 – It’s our turn to arrive! the three Mont Blancs (Mont The route via the Cosmiques re- 09:10 – Everything is finished, Blanc du Tacul, Mont Maudit, fuge is longer and more calleng- we start our descent. and Mont Blanc itself). ing which makes it more inter- Two hours later, we all arrive at So on Saturday, the rest of the esting. Moreover, as we will be the Goûter refuge 1000m down group climbed to the Goûter re- going down via the Goûter re- the mountain, having climbed fuge while we went via the fuge, we will have crossed Mont down the famous L’arrête des Cosmiques refuge, followed by Blanc in its entirety, making a Bosses. After a further two the ascent to the summit of little dream come true for my hours, we arrive at the Tête Mont Blanc du Tacul (4248m). Swiss colleagues. Rousse refuge following the I will use the “Goûter team” to At the top, the temperature is a descent of the infamous Couloir refer to the team members who bone-chilling -20°C and with the du Goûter before continuing for climbed via the refuge of the wind gusting up to 60km/h and another 2 hours to reach the same name and the “Cosmiques the swirling snow whipping in little rack railway. team” for those of us who took our faces, the perceived temper- A welcome committee is waiting the second route. ature is about -40°C: a friendly for us to celebrate the event. Regretfully Olivier injured his calf, greeting from the mountain. We so he stayed behind at the Tête are standing above the clouds We travel back and enjoy an Rousse refuge (below the Goûter which open up from time to time official dinner and reception. refuge). I feel sorry for him and to give a brief glimpse of the After speeches and thank you’s hope he will be able to join us in land below, but the wind-chill it’s finally time for bed. Some two years time for the 10th an- factor makes it intensely cold days it seems we life a fuller life niversary of the Mont Blanc mea- and very uncomfortable: we all than others! surement expedition. go into survival mode. One of Everyone arrived safely at the re- the surveyors suffers frostbite in fuge and 5 cm of snow fell during four fingers and is airlifted out the evening to cover our tracks by helicopter from the Goûter with a pristine blanket of white. refuge. The mountain certainly knows Our GPS systems are working how to dress for the occasion. perfectly. With only one internal GEB211 battery in the aerial and Sunday 13th September 2009 another in the RX1250 control The night was relatively short. unit, we spend 1 hour 16 min- Our Cosmiques team was up at utes standing still taking the 00:45 and on our way at 02:00 necessary measurements. while the Goûter team woke at While we are determining the 02:00 to leave at 03:30. elevation, we use another GPS With our helmet lamps lighting to measure the ice sheet over the way, we proceeded through a period of 52 minutes. the clear and frosty night carry- The 2 cameramen film their ing the three Leica SmartRover reports and interview the team GPS to the summit (1 for us and members. We succeed in con- Leica Geosystems AG Heinrich-Wild-Strasse CH-9435 Heerbrugg Switzerland Phone +41 71 727 31 31 www.leica-geosystems.com.
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