BIRDY–T Daniel Hestroffer - IMCCE/Paris obs., PSL Research univ., France M. Agnan ESEP - Odysseus Space Ltd.,Taiwan J.J. Miau - NCKU,Taiwan G. Quinsac - LESIA/Paris observatory, France P. Rosenblatt - ROB, Belgium B. Segret LESIA-ESEP/Paris observatory, France J. Vannitsen - NCKU - Odysseus Space Ltd.,Taiwan
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BIRDY–T - iCubeSat · PDF fileBIRDY–T Daniel Hestroffer - IMCCE/Paris obs., PSL Research univ., France M. Agnan ESEP - Odysseus Space Ltd., Taiwan J.J. Miau - NCKU, Taiwan
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BIRDY–T
Daniel Hestroffer - IMCCE/Paris obs., PSL Research univ., France
M. Agnan ESEP - Odysseus Space Ltd., TaiwanJ.J. Miau - NCKU, Taiwan
G. Quinsac - LESIA/Paris observatory, FranceP. Rosenblatt - ROB, Belgium
B. Segret LESIA-ESEP/Paris observatory, FranceJ. Vannitsen - NCKU - Odysseus Space Ltd., Taiwan
• Derive mass, density, and moments of inertia +higher moments of gravity field (spherical/elliptical harmonics) test internal structure and density distribution
• Advantages of CubeSat
‣ CubeSat spacecraft dedicated to instrument (or target)
‣ autonomy in operations/orbits
‣ closer to surface (higher risks)
‣ proximity operations
• Constraints
‣ no direct link to Earth (à priori), => relying on mothercraft
‣ no example of radio-science cubesat, nor interplanetary
Tracking data: 2-way radio-link between the Earth and the spacecraft orbiting the systemDoppler and range measurements
Precise Orbit Determination (POD)Dedicated orbitography software (like GINS(1)):• Calculation of orbit from least
squares fitting of a dynamicalmodel of motion to tracking data
• Determination of the parameter of geophysical interest (Mass and gravity field of primary, mass of secondary)
XbandKa-band
(1) Géodésie par Intégration Numériques simultanées, developed by the French space agency (CNES) and further adapted to planetary geodesy applications by the Royal Observatory of Belgium (ROB).