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Smith A.,University College London | Crawford I.A.,University of London | Gowen R.A.,University College London | Ambrosi R.,University of Leicester | And 57 more authors.
Experimental Astronomy | Year: 2012

Emplacement of four or more kinetic penetrators geographically distributed over the lunar surface can enable a broad range of scientific exploration objectives of high priority and provide significant synergy with planned orbital missions. Whilst past landed missions achieved a great deal, they have not included a far-side lander, or investigation of the lunar interior apart from a very small area on the near side. Though the LCROSS mission detected water from a permanently shadowed polar crater, there remains in-situ confirmation, knowledge of concentration levels, and detailed identification of potential organic chemistry of astrobiology interest. The planned investigations will also address issues relating to the origin and evolution of the Earth-Moon system and other Solar System planetary bodies. Manned missions would be enhanced with use of water as a potential in-situ resource; knowledge of potential risks from damaging surface Moonquakes, and exploitation of lunar regolith for radiation shielding. LunarNet is an evolution of the 2007 LunarEX proposal to ESA (European Space Agency) which draws on recent significant advances in mission definition and feasibility. In particular, the successful Pendine full-scale impact trials have proved impact survivability for many of the key technology items, and a penetrator system study has greatly improved the definition of descent systems, detailed penetrator designs, and required resources. LunarNet is hereby proposed as an exciting stand-alone mission, though is also well suited in whole or in-part to contribute to the jigsaw of upcoming lunar missions, including that of a significant element to the ILN (International Lunar Network). © 2011 Springer Science+Business Media B.V. Source


Kenyon S.,Surrey Satellite Technology | Bridges C.,University of Surrey | Liddle D.,SSTL | Dyer B.,SSTL | And 18 more authors.
62nd International Astronautical Congress 2011, IAC 2011 | Year: 2011

STRaND-1 is the first in a series of Surrey Satellite Technology Ltd. (SSTL)-Surrey Space Centre (SSC) collaborative satellites designed for the purpose of technology path finding for future commercial operations. It is the first time Surrey has entered the CubeSat field and differs from most CubeSats in that it will fly a modern Commercial Off The Shelf (COTS) Android smartphone as a payload, along with a suite of advanced technologies developed by the University of Surrey, and a payload from the University of Stellenbosch in South Africa. STRaND-1 is also different in that anyone (not just from the space engineering or space science community) will be eligible to fly their "app" in space, for free. STRaND-1 is currently being manufactured and tested by volunteers in their own free time, and will be ready for an intended launch in the first quarter of 2012. This paper outlines the STRaND pathfinder programme philosophy which challenges some conventional space engineering practises, and describes the impact of those changes on the satellite development lifecycle. The paper then briefly describes the intent behind the design of STRaND-1, before presenting details on the design of the nanosatellite, focussing of the details of the innovative new technologies. These technologies include two different propulsion systems, an 802.11g WiFi experiment, a new VHF/UHF transceiver unit and a miniature 3-axis reaction wheel assembly. The novel processing setup (which includes the smartphone) is discussed in some detail, particularly the potential for outreach via the open source nature of Google's Android operating system. A step-through of the planned concept of operations is provided, which includes a possible rendezvous and inspection objective, demonstrating equal or improved capability compared to SNAP-1 with a reduced total system mass. Finally, data from the test campaign is presented and compared against other notable CubeSats known for their advanced capabilities. Rendered images of STRaND-1 are shown in Fig. I and are discussed later in the paper. Copyright ©2011 by Surrey Satellite Technology Ltd. All rights reserved. Source


Cutter M.,SSTL | Unwin M.J.,SSTL | De Vos Van Steenwijk R.,SSTL | Gommenginger C.,National Oceanographic Center | And 2 more authors.
61st International Astronautical Congress 2010, IAC 2010 | Year: 2010

A new GNSS receiver and remote sensing instrument has been developed by SSTL and partners. Global Navigation Satellite Systems (GNSS), which include both the GPS and Europe's fledgling Galileo systems, radiate signals at the Earth from orbit. Beyond the every day application of navigation, these signals can also contain information that is valuable to scientists interested in studying the Earth from space. Information about the Earth's atmosphere and Ionosphere can be derived using a technique known as GNSS Radio Occultation (GNSS-RO), whereby signals that pass through the Earth atmosphere are received by a small satellite orbiting in a Low Earth Orbit (roughly 400-800km) and then looking at the distortions on those signals. GNSS Reflectometry (GNSS-R) is a relatively new application and this technique seeks to derive information about the Earth by looking at GNSS signals that have been reflected off the Earth's surface and subsequently received by a satellite in low Earth orbit. In the process of reflecting, these signals are distorted by the reflecting surface and, through the use of inversion models, it is possible to subsequently derive information about that surface from the signals. The driving application for this development is the monitoring of the Earth's oceans and, in particular, information about ocean roughness and wind speeds could be derived. Reflections off land and ice have also been detected and potentially contain a wealth of useful information. The concept has been proved on an experiment flown on SSTL's UK-DMC mission, but more data from orbit is required to improve the models that will allow this technique to become a useful tool to scientists. At its heart, the GNSS-RSI is a highly versatile, multi-frequency GNSS navigation receiver. With the addition of multiple front-ends, reconfigurable DSP capabilities, a small data recorder and specialised antennas, the GNSS-RSI enables both Reflectometry and Radio Occultation applications. Building on SSTL's small satellite expertise and using state of the art technology, the instrument aims to provide a highly capable yet relatively compact and affordable way of studying the Earth from orbit. Source


Naidu B.V.V.,SSTL | Vemananda Reddy G.V.,SSTL | Nagaraja Rao C.,Vijaya College
Indian Silk | Year: 2011

Today it is info-savvy age - any piece of information, just a click away. The development is taking place in sericulture as well. The authors have developed a package that offers comprehensive information on diseases and pests in sericulture that would eventually help in management of these problems. Source


Singh R.,SSTL | Kumar V.,SSTL | Singh G.B.,SSTL | Chakma T.K.,SSTL
Indian Silk | Year: 2013

Sericulture in Tripura introduced a couple of decades back, is making a foothold with the congenial climate and availability of flora and manpower resources. The steady progress of the sector in the state calls for specific initiation. The article presents the prevailing sericulture scenario and suggests the measures for development. Source

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