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CNES TOULOUSE 18th December 2012

EUSO BALLOON MISSION ANALYSIS. CNES TOULOUSE 18th December 2012. MISSION REQUIREMENTS BALLOON FLIGHT PROFILE and WINDS LAUNCH SITES (TRAJECTORIES, BEST PERIODS) MOON and other CONSTRAINTS CONCLUSION. MISSION REQUIREMENTS A- level : Technological demonstrator.

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CNES TOULOUSE 18th December 2012

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  1. EUSO BALLOON MISSION ANALYSIS CNES TOULOUSE 18th December 2012

  2. MISSION REQUIREMENTS • BALLOON FLIGHT PROFILE and WINDS • LAUNCH SITES (TRAJECTORIES, BEST PERIODS) • MOON and other CONSTRAINTS • CONCLUSION

  3. MISSION REQUIREMENTS A- level : Technological demonstrator [MRA2] : at least 3 hours moonless and 3 hours with moon (<25 % full moon). The absolute minimum requirements : 2 hours during the night with moon (<25 % full moon). [MRA3] flight data at float level shall include sudden background enhancements due to city lights etc…

  4. MISSION REQUIREMENTSB- level : Real data and background study • [MRB1] A part of the above B-level requirements may already be met during a first balloon • 1st priority : over ocean / moonless • 2nd priority : over ocean / moon • 3rd priority : over land / moonless • 4th priority : over land, moon • Accordingly, the launch site/season for a second flight will be chosen to allow for a flight over an ocean, the precise launch date shall allow to observe at least 2h (TBD) at a float level of 3 mbar.

  5. MISSION REQUIREMENTSC-level (precursor mission): • [MRC1] Long duration flight operation(≥ 50 hours at night, TBC)ofthe EUSO-Balloon instrument in trigger mode and inlow background configuration • [MRC4] Choose launch date to allow for a part of the flight over a high reflectivity surface (clouds, snow ...)

  6. Balloon flight profileand Winds Ceiling : Few hours, 1 night or more… Altitude Balloon size for EUSO : 400 000 m3 -> 40 Km altitude 40 Km Stratospheric winds : From West : September <-> April From East : May <-> August Turn around period : ~2 weeks, Ideal for long duration flights Dificult for trajectory forecasts Descent : 30 min Ascent ~ 3 hours Time

  7. BIG BALLOON LAUNCH SITES Kiruna Sweden : Well known site, opened End August <-> mid September, long duration flights possible (Turn Around), Lakes are not frozen. Mid September <-> end October, Gulf of Buthnia possible, landing in Russia possible too

  8. BIG BALLOON LAUNCH SITES • Timmins Canada : New site, first launches next March 2013 May and September, long duration flights possible June <-> August, fly over the Lake Superior possible with USA agreement

  9. BIG BALLOON LAUNCH SITES • French sites Aire and Gap : Closed for safety reasons (2006) Should be opened with sea recovery (2015 TBC) Perfect site for technological and real data acquisition Ideal period : late May <-> mid June

  10. BIG BALLOON LAUNCH SITES Alice Springs :CSBF launch site Ideal period : Early November, possible later with other TM/TC Stations Good site for cosmic ray acquisition Balloon campaign expected for PILOT Mission 2017 November, December

  11. BIG BALLOON LAUNCH SITESOther sites possible • Andaman Islands : 1300 Km over Indian Ocean, 550 Km over India. Possible cooperation. When ? • Florida to Japan : 1500 Km over Gulf of Mexico, 1300 Km over USA and Mexico, 11200 Km over Pacific ocean. Sea recovery in South Japan archipelago. Gustavo is promoting this flight with AEM and NASA. When ? After CNES flights • New Caledonia to Australia : 1500 Km over the sea, 3700 Km over Australia. When ?

  12. MOON and other CONSTRAINTS Moon Maximum : 25% of the full moon=>~ 8 days per month usable If MRA2 objectives must be reached in a single flight => only 4 days possibles on the Timmins 2014 Spring campaign (April and May) Other constraints A balloon is launched when : Gondola is ready to fly Mission objectives are reachable Trajectory is acceptable (safety, recovery) Ground weather conditions are good

  13. HOW MANY FLIGHT ? • First flight : Timmins 2014. • 2 hours or much more with moon <= 25% • Clouds, snow, water, duration • Sudden background enhancements due to city lights etc… • Second flight : Timmins, Kiruna or Aire sur l’Adour, 2015 ? • Kiruna : Clouds, snow, water • Sudden background enhancements due to city lights etc… • Aire :Clouds,snow,water, duration • Sudden background enhancements due to city lights etc… • Third flight :Timmins, Kiruna or Aire sur l’Adour, 2016 or Alice Springs , 2017 ? • Alice Springs : Clouds, snow, water, city lights, duration

  14. HOW MANY FLIGHT ? • Sites have advantages and inconveniences With USA Agreement It’ll depend on results of each flight and on CNES balloon campaigns decided but 3 flights seem a minimum Florida to Japan flight with CSBF will be « Frosting on the cake »

  15. Risques vol BSO départ Aire sur l’AdourPartie quantitative Altitude Ascent risk : 1.05 10-5 Risk at ceilling : 0.58 10-5 End of flight risk: 0.15 10-5 ------------- Flight risk : 1.78 10-5 40 Km Maximum risk : 3.0 10-5 Aire Landes Mer Temps

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