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SMART-1: using e-VLBI to track satellites

SMART-1: using e-VLBI to track satellites. Arpad Szomoru. Why ?. Primary mission of JIVE and EVN is astronomical research Satellite tracking: Technological challenge Explore new methods of data acquisition, data processing e-VLBI: Test-case for networking community: lightpaths on demand

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SMART-1: using e-VLBI to track satellites

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  1. SMART-1: using e-VLBI to track satellites Arpad Szomoru

  2. Why? • Primary mission of JIVE and EVN is astronomical research • Satellite tracking: • Technological challenge • Explore new methods of data acquisition, data processing • e-VLBI: Test-case for networking community: lightpaths on demand • Powerful demonstrator of capabilities of VLBI: PR

  3. Spacecraft

  4. Parachute flight dynamics Huygens descent tracking • Detection during descent • Salvage of Doppler experiment • Building up experience with spacecraft tracking • Special purpose, narrow band software correlator

  5. Parkes Cessna Mopra • Huygens VLBI data – Parkes & Mopra (CSIRO)  Sydney. • Dedicated light path: • Sydney  Seattle  JIVE (user controlled light path) • 2 x 13 minutes scans transferred at data rates of 450 Mbps • Calibrator fringes <12 hrs after observations made.

  6. e-VLBI to South America? SMART-1 SMART-1 factsheet Testing solar-electric propulsion and other deep-space technologiesName SMART stands for Small Missions for Advanced Research in Technology.  Description SMART-1 is the first of ESA’s Small Missions for Advanced Research in Technology. It travelled to the Moon using solar-electric propulsion and carrying a battery of miniaturised instruments. As well as testing new technology, SMART-1 is making the first comprehensive inventory of key chemical elements in the lunar surface. It is also investigating the theory that the Moon was formed following the violent collision of a smaller planet with Earth, four and a half thousand million years ago.Launched 27 September 2003 Status Arrived in lunar orbit, 15 November 2004. Conducting lunar orbit science operations. Notes SMART-1 is the first European spacecraft to travel to and orbit around the Moon. This is only the second time that ion propulsion has been used as a mission's primary propulsion system (the first was NASA's Deep Space 1 probe launched in October 1998). SMART-1 is looking for water (in the form of ice) on the Moon. To save precious xenon fuel, SMART-1 uses 'celestial mechanics', that is, techniques such as making use of 'lunar resonances' and fly-bys.

  7. Carrier CoherentHarmonics Spacecraft Spectrum

  8. SMART-1: Occultation by Moon SMART-1 carrier wave voltage, powerand phaseas detected by Medicina station Post-egress “classical” diffraction pattern and zoom on pre-egress features, like those seen around seconds 5 and 8-10 For comparison: power (red) and phase (blue) patterns for diffraction on a flat circular screen

  9. Signals (SMART-1 Impact on Moon) http://sci.esa.int TIGO Concepcion Hobart26m SMART-1 last light @ Hobart: 05:42:22.394060(5) 03 Sep 2006 UTC

  10. e-VLBI to Sourth America

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