| 1. Identificação | |
| Tipo de Referência | Capítulo de Livro (Book Section) |
| Site | marte3.sid.inpe.br |
| Código do Detentor | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identificador | 6qtX3pFwXQZ3r59YCT/H3NpV |
| Repositório | sid.inpe.br/iris@1905/2005/08.04.04.49 (acesso restrito) |
| Última Atualização | 2017:12.06.14.47.57 (UTC) marciana |
| Repositório de Metadados | sid.inpe.br/iris@1905/2005/08.04.04.49.35 |
| Última Atualização dos Metadados | 2021:02.11.18.29.47 (UTC) administrator |
| Chave Secundária | INPE-8045-PRE/3861 |
| Rótulo | 9027 |
| Chave de Citação | SouzaNune:2002:MeThAp |
| Título | Forecasting space debris distribution: a mesure theory approach  |
| Formato | ISBN 85-17-00006-4 |
| Ano | 2002 |
| Data Secundária | 20021213 |
| Data de Acesso | 05 maio 2024 |
| Tipo Secundário | PRE LN |
| Número de Arquivos | 1 |
| Tamanho | 2775 KiB |
| 2. Contextualização | |
| Autor | 1 Souza, Marcelo Lopes Oliveira e 2 Nunes, Danton |
| Grupo | 1 DMC-INPE-MCT-BR |
| Editor | Winter, Othon Cabo Prado, Antonio Fernando Bertachini de Almeida |
| Título do Livro | International Astronautical Congress, 51 (IAF) Advances in space dynamics 3: applications in astronautics |
| Editora (Publisher) | INPE |
| Cidade | São José dos Campos |
| Páginas | 12-27 |
| Título da Série | Advances in space dynamics 3: applications in astronautics |
| Histórico (UTC) | 2008-06-09 21:41:44 :: administrator -> jefferson :: 2012-08-02 17:55:12 :: jefferson -> administrator :: 2017-12-06 14:46:35 :: administrator -> marciana :: 2002 2017-12-06 14:47:57 :: marciana -> administrator :: 2002 2021-02-11 18:29:47 :: administrator -> :: 2002 |
| 3. Conteúdo e estrutura | |
| É a matriz ou uma cópia? | é a matriz |
| Estágio do Conteúdo | concluido |
| Transferível | 1 |
| Palavras-Chave | ENGENHARIA E TECNOLOGIA ESPACIAL space debris covariance |
| Resumo | The goal of this paper is to show how traditional covariance matrix propagation is not always fit for the purpose of forecasting either the distribution of space debris or (which turns out to be equivalent)the probability of finding a body drifting on a gravitational field with incomplete knowledge of its initial conditions. The main limitation of covariance matrix propagation comes front the fact that the debris density function is poorly described by the mo first moments alone, even if the initial density function is spherical. Given enough time, the chaotic nature of the motion under gravity stretches and bends the initial debris distribution into distorted and growing shapes (called by us "bananoids")that the two lowest moments can no longer model it. To illustrate this fact we analyze a very simple model composed of an almost massless body under the action of a central gravitational force to show that, even under such favourable conditions (no atmospheric effects, no non-gravitational forces, no random forces), covariance propagation fails miserably. To overcome the limitations of the traditional approach we turn to the differential equations of the motion and its topological and measure properties. The partial differential equation that describes the time history of the debris distribution is of the same mathematical nature of the Lagrangian or material derivative of the fluid mechanics. If we add random forces the motion becomes a diffusion process. Its distribution is thus governed by the well known Kolmogorov-Fokker-Planck partial differential equation. Covariance matrix propagation is indeed an approximate solution to the KFP equation. We propose that more elaborate approximations be used, cither including higher moments or moving to a new ser of base functions. |
| Área | ETES |
| Arranjo | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDMC > Forecasting space debris... |
| Conteúdo da Pasta doc | acessar |
| Conteúdo da Pasta source | não têm arquivos |
| Conteúdo da Pasta agreement | não têm arquivos |
| 4. Condições de acesso e uso | |
| Arquivo Alvo | 8045.pdf |
| Grupo de Usuários | administrator |
| Visibilidade | shown |
| Permissão de Leitura | deny from all and allow from 150.163 |
| Permissão de Atualização | não transferida |
| 5. Fontes relacionadas | |
| Unidades Imediatamente Superiores | 8JMKD3MGPCW/446AF4B |
| Acervo Hospedeiro | sid.inpe.br/banon/2001/04.03.15.36 |
| 6. Notas | |
| Campos Vazios | affiliation archivingpolicy archivist callnumber contenttype copyholder copyright creatorhistory descriptionlevel dissemination doi e-mailaddress edition electronicmailaddress isbn issn language lineage mark mirrorrepository nextedition notes numberofvolumes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup resumeid rightsholder schedulinginformation secondarymark serieseditor session shorttitle sponsor subject tertiarymark tertiarytype translator url versiontype volume |