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PAYLOAD FRACTION [4 records]

Record 1 2007-07-23

English

Subject field(s)
  • Orbital Stations
  • Research Experiments in Space
DEF

[At the exclusion of the Hexapod], hardware that is permanently on orbit and [that] can be shared by users.

OBS

The Lab Support Equipment(LSE) and Station Support Equipment(SSE) comprise the general-purpose equipment and tool items developed to support ISS [International Space Station] maintenance and payload operations.(The distinction between LSE and SEE related mainly to where the equipment originates from within the ISS Program.) A significant fraction of this equipment exists to support research, and consists of the sorts of basic equipment such as pH meters and microscopes that would be found in typical ground-based research lab.

OBS

laboratory support equipment; LSE: term and abbreviation officially approved by the International Space Station official approval Group (ISSOAG).

French

Domaine(s)
  • Stations orbitales
  • Travaux de recherche dans l'espace
OBS

équipement de laboratoire permanent; LSE : terme et abréviation uniformisés par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).

Spanish

Save record 1

Record 2 2007-03-17

English

Subject field(s)
  • Missiles and Rockets
  • Spacecraft
  • Launchers (Astronautics)
DEF

The ratio of the mass of a launch vehicle’s payload to the mass of the total vehicle at lift-off.

French

Domaine(s)
  • Missiles et roquettes
  • Engins spatiaux
  • Lanceurs (Astronautique)
DEF

Rapport de la masse sèche d'un étage de fusée à la masse totale de cet étage avant allumage.

OBS

Cet indice exprime en général la performance de la structure réalisée.

Spanish

Save record 2

Record 3 2004-05-03

English

Subject field(s)
  • Spacecraft
CONT

The xenon ion propulsion system, or XIPS(pronounced "zips"), is the culmination of nearly four decades of research into the use of electric propulsion as an alternative to conventional chemical propulsion.... the increased efficiency possible with XIPS allows for a reduction in propellant mass of up to 90% for a satellite designed for 12 to 15 years operation. Less propellant results in reduced cost for launch, an increase in payload, or an increase in satellite lifetime, or any combination of the above.... The on-board XIPS system is used primarily for spacecraft stationkeeping. Small thrusts are required to correct for the tug of solar or lunar gravity and to reposition the satellite in its proper orbit and altitude. A satellite's lifetime as well as its launch weight is thus determined by the amount of fuel aboard for its thruster system. While most current satellites use a chemical bipropellant propulsion system, a XIPS-equipped satellite instead uses the impulse generated by a thruster ejecting electrically charged particles at high velocities. XIPS requires only one propellant, xenon, and does its stationkeeping job using a fraction of that required by a chemical propellant system.

French

Domaine(s)
  • Engins spatiaux
CONT

Le système à propulsion ionique au xénon, ou XIPS, est l'aboutissement de presque 40 ans de recherches dans l'utilisation de la propulsion électrique comme alternative à la traditionnelle propulsion chimique . [...] XIPS permet un emport de masse de propergols réduit jusqu'à 90% pour un satellite devant opérer pendant 12 à 15 ans. Le système embarqué XIPS est utilisé en premier lieu pour le maintien en orbite . De toutes petites poussées sont nécessaires pour corriger l'attraction de la gravitation solaire ou lunaire et pour repositionner le satellite sur sa propre orbite, à la bonne altitude. La durée de vie d'un satellite ainsi que sa masse à lancer sont ainsi déterminées par la quantité d'ergols à embarquer pour son système de poussée. Un satellite équipé de XIPS utilise l'impulsion générée par une tuyère éjectant des particule chargées électriquement à très grandes vitesses. Le XIPS nécessite un seul ergol, le xénon. Le court du XIPS est une tuyère ionique, mesurant moins de 30 cm. Deux autres unités clés comprennent un réservoir contenant du gaz xénon (inerte et non combustible), et un générateur de puissance.

Spanish

Save record 3

Record 4 2001-07-17

English

Subject field(s)
  • Space Exploration Equipment and Tools
  • Orbital Stations
CONT

The Lab Support Equipment(LSE) and Station Support Equipment(SSE) comprise the general-purpose equipment and tool items developed to support ISS [International Space Station] maintenance and payload operations.(The distinction between LSE and SEE related mainly to where the equipment originates from within the ISS Program.) A significant fraction of this equipment exists to support research, and consists of the sorts of basic equipment such as pH meters and microscopes that would be found in typical ground-based research lab.

OBS

Station support equipment; SSE: term and abbreviation officially approved by the International Space Station official approval Group (ISSOAG).

French

Domaine(s)
  • Équipement et outillage d'exploration spatiale
  • Stations orbitales
OBS

équipement d'appui aux opérateurs de la Station; SSE : terme et abréviation uniformisés par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).

Spanish

Save record 4

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