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Tunable Superconducting Gravity Gradiometer for Mars Climate, Atmosphere, and Gravity Field InvestigationWe are developing a compact tensor superconducting gravity gradiometer (SGG) for obtaining gravimetric measurements from planetary orbits. A new and innovative design gives a potential sensitivity of approximately 10(sup -4) E Hz(sup - 1/2)( 1 E = 10(sup -9 S(sup -2) in the measurement band up to 0.1 Hz (suitale for short wavelength static gravity) and of approximately 10(sup -4) E Hz(sup - 1/2) in the frequency band less than 1 mHz (for long wavelength time-variable gravity) from the same device with a baseline just over 10 cm. The measurement band and sensitiy can be optimally tuned in-flight during the mission by changing resonance frequencies, which allows meaurements of both static and time-variable gravity fields from the same mission. Significant advances in the technologies needed for space-based cryogenic instruments have been made in the last decade. In particular, the use of cryocoolers will alleviate the previously severe constraint on mission lifetime imposed by the use of liquid helium, enabling mission durations in the 5 - 10 year range.
Document ID
20160008415
Document Type
Conference Paper
Authors
Griggs, C. E. (Maryland Univ. College Park, MD, United States)
Paik, H. J. (Maryland Univ. College Park, MD, United States)
Moody, M. V. (Maryland Univ. College Park, MD, United States)
Han, S.-C. (Newcastle Univ. Newcastle, Australia)
Rowlands, D. D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lemoine, F. G. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Shirron, P. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
July 1, 2016
Publication Date
March 16, 2015
Subject Category
Spacecraft Design, Testing and Performance
Lunar and Planetary Science and Exploration
Report/Patent Number
LPI Contribution No. 1735
GSFC-E-DAA-TN21240
Meeting Information
Lunar and Planetary Science Conference (LPSC 2015)(The Woodlands, TX)
Funding Number(s)
CONTRACT_GRANT: NNX14AI43G
CONTRACT_GRANT: NNX12AK18G
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Mars
SGG
Gravity

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