منابع مشابه
Catalyst for good: in Memoriam Mathilde Krim
Received 2 February 2018; Accepted 5 February 2018 Copyright © 2018 The Authors. Journal of the International AIDS Society published by John Wiley & sons Ltd on behalf of the International AIDS Society. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly...
متن کاملNavigation and Flight Mechanics Section at the Jet Propulsion Laboratory
The terminal navigation of the NEAR spacecraft during its close flyby of asteroid 253 Mathilde involved coordinated efforts first to determine the heliocentric orbits of the spacecraft and Mathilde and then to determine the relative trajectory of the spacecraft with respect to Mathilde. From ground-based optical observations alone, the error of Mathilde’s ephemeris at the time of encounter was ...
متن کاملSearch for rotational variation in the spectra of 253 Mathilde ?
253 Mathilde will be the next asteroid to be visited by a spacecraft (NEAR). Mathilde is an exceptional slow and complex rotatorwith a period of 17.4 days (Mottola et al., 1995). Binzel et al. (1996) have obtained the first spectrum ofMathilde in the visible range. To search for any variation on the asteroid surface, we have performed several observations in the visible range at the European So...
متن کاملMultiple Quantum Well Retromodulators for Spacecraft - To - Spacecraft Laser Interrogation
This paper describes a novel concept for laser-based interrogation, communication, and navigation between multiple spacecraft platforms using a gimbaled laser source on a pursuer spacecraft and a target board populated with retromodulators (modulating retroreflectors) integrated on a host spacecraft. The combined laser source and retroreflectors can provide centimeter-level relative positioning...
متن کاملA Global Spacecraft Control Network for Spacecraft Autonomy Research
The Stanford Space Systems Development Laboratory (SSDL) has initiated the development and integration of a worldwide space control network. This network will serve as a command and control architecture for scholastic and amateur spacecraft. In addition, it will offer a unique real world testbed for the application and validation of advanced autonomous spacecraft operations strategies. The prop...
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ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 1997
ISSN: 0096-3941
DOI: 10.1029/97eo00188