SCIENTIFIC AND TECHNICAL AEROSPACE REPORTS
A Biweekly Publication of the National Aeronautics and Space Administration
VOLUME 44, ISSUE 1 - January 13, 2006
18 SPACECRAFT DESIGN, TESTING AND PERFORMANCE
Includes satellites; space platforms; space stations; spacecraft systems and components such as thermal and environmental controls; and spacecraft control and stability characteristics.
For life support systems see 54 Man/System Technology and Life Support.
For related information see also 05 Aircraft Design, Testing and Performance; 39 Structural Mechanics; and 16 Space Transportation and Safety.
20060002338 ISRO Satellite Centre, Peenya, Bangalore, India
Journal of Spacecraft Technology, Volume 15, No. 2, July 2005
July 2005; 51 pp.; In English; See also 20060002339 - 20060002344; Original contains color and black and white illustrations; Copyright; Avail.: Other Sources
The Journal of Spacecraft Technology is a biannual publication of ISRO Satellite Centre, Bangalore, India. It is devoted exclusively to research and development in the fields of space and spacecraft technology and is meant for circulation amongst the professionals in the field. Contributions to the journal are invited in the related fields, in the form of review, technical papers and short communications. The articles will be subjected to review prior to publication. This journal features articles on such topics as Sputtered MoS2 lubrication of ball bearings for long-life space applications. Other topics include: development of light weight structure for technology experiment satellite (TES), Indian Regional Navigation Satellite System (IRNSS) concept, spacecraft in-orbit operations through multi-mission ground software, simulation of piezoelectric effect in NASTRAN: experimental and analytical estimation of dynamic response of a circular plate and understanding pseudo electrolyte-leak behaviour in Ni/H2 Cells. Derived from text
India; ISRO; Satellite Navigation Systems
20060002339 ISRO Satellite Centre, Peenya, Bangalore, India
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Indian Regional Navigation Satellite System (IRNSS) Concept
Ganeshan, A. S.; Rathnakara, S. C.; Gupta, R.; Jain, Anup K.; Journal of Spacecraft Technology, Volume 15, No. 2; July 2005, pp. 19-23; In English; See also 20060002338; Copyright; Avail.: Other Sources
The paper presents a new concept of regional navigation satellite constellation, as an alternate to GPS constellation, for providiiig space based navigation support to various land, sea and air navigation users over the Indian region. The continuous visibility of CEO and GSO satellites for near-equator regions provides a promising alternative for regional navigation. The paper discusses the design considerations and parameters required for evolving such a regional system. The orbital characteristics, the criteria for choosing the constellation and the methodology have been highlighted. The error sources and the achievable accuracy for the user in the service area are brought out. Based on the studies, the proposed IRNSS consists of 7 satellites (3 in CEO and 4 in inclined GSO with 29 deg inclination). Author
Navigation Satellites; Global Positioning System
20060002340 ISRO Satellite Centre, Peenya, Bangalore, India
Spacecraft In-Orbit Operations through Multi-Mission Ground Software
Gnanabharanidharan, N.; Pankaj Padmakar, Joshi; Journal of Spacecraft Technology, Volume 15, No. 2; July 2005, pp. 24-30; In English; See also 20060002338; Copyright; Avail.: Other Sources
Spacecraft operations require continuous monitoring of the health of the spacecraft and its commanding for the intended operations. These operations are carried out on the ground using sophisticated mission-oriented software tools. SCHEMACS is one such software which is being used for ISRO-built satellites. Design, development and maintenance of SCHEMACS is part of any satellite mission and a considerable amount of commonalities are found while developing SCHEMACS for various missions. By taking these factors into consideration and also the logical nature of software in general, a common unified version of SCHEMACS called multi-mission SCHEMACS has been developed and operationalized. At present, there exists a multi-mission software version suitable for LEO missions and another version suitable for supporting CEO missions. This multi-mission software version has been found useful in maintaining the software and in carrying out routine as well contingency satellite operations and health analyses with maximum ease and least effort. A single common LEO-SCHEMACS current version supports IRS-P4, TES and RESOURCESAT-I, while CEO-SCHEMACS supports INSAT-ZE, INSAT-3A, 38, 3C, 3E, KALPANA-I, GSAT-2&3. In this paper, various ways and approaches to achieve this kind of a software system have been explored and presented. Author
Ground Operational Support System; Computer Programs; Low Earth Orbits; Satellite Orbits
Source: NASA.
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