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Measuring currents, ice drift, and waves from space: the Sea surface KInematics Multiscale monitoring (SKIM) concept ArchiMer
Ardhuin, Fabrice; Aksenov, Yevgueny; Benetazzo, Alvise; Bertino, Laurent; Brandt, Peter; Caubet, Eric; Chapron, Bertrand; Collard, Fabrice; Cravatte, Sophie; Delouis, Jean Marc; Dias, Frederic; Dibarboure, Gerald; Gaultier, Lucile; Johannessen, Johnny; Korosov, Anton; Manucharyan, Georgy; Menemenlis, Dimitris; Menendez, Melisa; Monnier, Goulven; Mouche, Alexis; Nouguier, Frederic; Nurser, George; Rampal, Pierre; Reniers, Ad; Rodriguez, Ernesto; Stopa, Justin; Tison, Celine; Ubelmann, Clement; Van Sebille, Erik; Xie, Jiping.
We propose a satellite mission that uses a near-nadir Ka-band Doppler radar to measure surface currents, ice drift and ocean waves at spatial scales of 40 km and more, with snapshots at least every day for latitudes 75 to 82 degrees, and every few days for other latitudes. The use of incidence angles of 6 and 12 degrees allows for measurement of the directional wave spectrum, which yields accurate corrections of the wave-induced bias in the current measurements. The instrument's design, an algorithm for current vector retrieval and the expected mission performance are presented here. The instrument proposed can reveal features of tropical ocean and marginal ice zone (MIZ) dynamics that are inaccessible to other measurement systems, and providing global...
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Ano: 2018 URL: http://archimer.ifremer.fr/doc/00442/55318/56843.pdf
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Planck 2018 results: IX. Constraints on primordial non-Gaussianity ArchiMer
Akrami, Y.; Arroja, F.; Ashdown, M.; Aumont, J.; Baccigalupi, C.; Ballardini, M.; Banday, A. J.; Barreiro, R. B.; Bartolo, N.; Basak, S.; Benabed, K.; Bernard, J. -p.; Bersanelli, M.; Bielewicz, P.; Bond, J. R.; Borrill, J.; Bouchet, F. R.; Bucher, M.; Burigana, C.; Butler, R. C.; Calabrese, E.; Cardoso, J. -f.; Casaponsa, B.; Challinor, A.; Chiang, H. C.; Colombo, L. P. L.; Combet, C.; Crill, B. P.; Cuttaia, F.; De Bernardis, P.; De Rosa, A.; De Zotti, G.; Delabrouille, J.; Delouis, Jean Marc; Di Valentino, E.; Diego, J. M.; Dore, O.; Douspis, M.; Ducout, A.; Dupac, X.; Dusini, S.; Efstathiou, G.; Elsner, F.; Ensslin, T. A.; Eriksen, H. K.; Fantaye, Y.; Fergusson, J.; Fernandez-cobos, R.; Finelli, F.; Frailis, M.; Fraisse, A. A.; Franceschi, E.; Frolov, A.; Galeotta, S.; Galli, S.; Ganga, K.; Genova-santos, R. T.; Gerbino, M.; Gonzalez-nuevo, J.; Gorski, K. M.; Gratton, S.; Gruppuso, A.; Gudmundsson, J. E.; Hamann, J.; Handley, W.; Hansen, F. K.; Herranz, D.; Hivon, E.; Huang, Z.; Jaffe, A. H.; Jones, W. C.; Jung, G.; Keihanen, E.; Keskitalo, R.; Kiiveri, K.; Kim, J.; Krachmalnicoff, N.; Kunz, M.; Kurki-suonio, H.; Lamarre, J. -m.; Lasenby, A.; Lattanzi, M.; Lawrence, C. R.; Le Jeune, M.; Levrier, F.; Lewis, A.; Liguori, M.; Lilje, P. B.; Lindholm, V.; Lopez-caniego, M.; Ma, Y. -z.; Macias-perez, J. F.; Maggio, G.; Maino, D.; Mandolesi, N.; Marcos-caballero, A.; Maris, M.; Martin, Pg; Martinez-gonzalez, E.; Matarrese, S.; Mauri, N.; Mcewen, J. D.; Meerburg, P. D.; Meinhold, P. R.; Melchiorri, A.; Mennella, A.; Migliaccio, M.; Miville-deschenes, M. -a.; Molinari, D.; Moneti, A.; Montier, L.; Morgante, G.; Moss, A.; Munchmeyer, M.; Natoli, P.; Oppizzi, F.; Pagano, L.; Paoletti, D.; Partridge, B.; Patanchon, G.; Perrotta, F.; Pettorino, V.; Piacentini, F.; Polenta, G.; Puget, J. -l.; Rachen, J. P.; Racine, B.; Reinecke, M.; Remazeilles, M.; Renzi, A.; Rocha, G.; Rubino-martin, J. A.; Ruiz-granados, B.; Salvati, L.; Savelainen, M.; Scott, D.; Shellard, E. P. S.; Shiraishi, M.; Sirignano, C.; Sirri, G.; Smith, K.; Spencer, L. D.; Stanco, L.; Sunyaev, R.; Suur-uski, A. -s.; Tauber, J. A.; Tavagnacco, D.; Tenti, M.; Toffolatti, L.; Tomasi, M.; Trombetti, T.; Valiviita, J.; Van Tent, B.; Vielva, P.; Villa, F.; Vittorio, N.; Wandelt, B. D.; Wehus, I. K.; Zacchei, A.; Zonca, A..
We analyse the Planck full-mission cosmic microwave background (CMB) temperature and E-mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). We compare estimates obtained from separable template-fitting, binned, and optimal modal bispectrum estimators, finding consistent values for the local, equilateral, and orthogonal bispectrum amplitudes. Our combined temperature and polarization analysis produces the following final results: (local)(NL) = -0.9 +/- 5.1 f NL local = - 0.9 +/- 5.1 ; f(NL)(equil) = -26 +/- 47 f NL equil = - 26 +/- 47 ; and f(NL)(ortho) = -38 +/- 24 f NL ortho = - 38 +/- 24 (68% CL, statistical). These results include low-multipole (4 <= l< 40) polarization data that are not included in our previous...
Tipo: Text Palavras-chave: Cosmic background radiation; Cosmology: observations; Cosmology: theory; Early Universe; Inflation; Methods: data analysis.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00654/76635/77783.pdf
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Planck 2018 results: V. CMB power spectra and likelihoods ArchiMer
Aghanim, N.; Akrami, Y.; Ashdown, M.; Aumont, J.; Baccigalupi, C.; Ballardini, M.; Banday, A. J.; Barreiro, R. B.; Bartolo, N.; Basak, S.; Benabed, K.; Bernard, J. -p.; Bersanelli, M.; Bielewicz, P.; Bock, J. J.; Bond, J. R.; Borrill, J.; Bouchet, F. R.; Boulanger, F.; Bucher, M.; Burigana, C.; Butler, R. C.; Calabrese, E.; Cardoso, J. -f.; Carron, J.; Casaponsa, B.; Challinor, A.; Chiang, H. C.; Colombo, L. P. L.; Combet, C.; Crill, B. P.; Cuttaia, F.; De Bernardis, P.; De Rosa, A.; De Zotti, G.; Delabrouille, J.; Delouis, Jean Marc; Di Valentino, E.; Diego, J. M.; Dore, O.; Douspis, M.; Ducout, A.; Dupac, X.; Dusini, S.; Efstathiou, G.; Elsner, F.; Ensslin, T. A.; Eriksen, H. K.; Fantaye, Y.; Fernandez-cobos, R.; Finelli, F.; Frailis, M.; Fraisse, A. A.; Franceschi, E.; Frolov, A.; Galeotta, S.; Galli, S.; Ganga, K.; Genova-santos, R. T.; Gerbino, M.; Ghosh, T.; Giraud-heraud, Y.; Gonzalez-nuevo, J.; Gorski, K. M.; Gratton, S.; Gruppuso, A.; Gudmundsson, J. E.; Hamann, J.; Handley, W.; Hansen, F. K.; Herranz, D.; Hivon, E.; Huang, Z.; Jaffe, A. H.; Jones, W. C.; Keihanen, E.; Keskitalo, R.; Kiiveri, K.; Kim, J.; Kisner, T. S.; Krachmalnicoff, N.; Kunz, M.; Kurki-suonio, H.; Lagache, G.; Lamarre, J. -m.; Lasenby, A.; Lattanzi, M.; Lawrence, C. R.; Le Jeune, M.; Levrier, F.; Lewis, A.; Liguori, M.; Lilje, P. B.; Lilley, M.; Lindholm, V.; Lopez-caniego, M.; Lubin, Pm; Ma, Y. -z.; Macias-perez, J. F.; Maggio, G.; Maino, D.; Mandolesi, N.; Mangilli, A.; Marcos-caballero, A.; Maris, M.; Martin, Pg; Martinez-gonzalez, E.; Matarrese, S.; Mauri, N.; Mcewen, J. D.; Meinhold, P. R.; Melchiorri, A.; Mennella, A.; Migliaccio, M.; Millea, M.; Miville-deschenes, M. -a.; Molinari, D.; Moneti, A.; Montier, L.; Morgante, G.; Moss, A.; Natoli, P.; Norgaard-nielsen, H. U.; Pagano, L.; Paoletti, D.; Partridge, B.; Patanchon, G.; Peiris, H. V.; Perrotta, F.; Pettorino, V.; Piacentini, F.; Polenta, G.; Puget, J. -l.; Rachen, J. P.; Reinecke, M.; Remazeilles, M.; Renzi, A.; Rocha, G.; Rosset, C.; Roudier, G.; Rubino-martin, J. A.; Ruiz-granados, B.; Salvati, L.; Sandri, M.; Savelainen, M.; Scott, D.; Shellard, E. P. S.; Sirignano, C.; Sirri, G.; Spencer, L. D.; Sunyaev, R.; Suur-uski, A. -s.; Tauber, J. A.; Tavagnacco, D.; Tenti, M.; Toffolatti, L.; Tomasi, M.; Trombetti, T.; Valiviita, J.; Van Tent, B.; Vielva, P.; Villa, F.; Vittorio, N.; Wandelt, B. D.; Wehus, I. K.; Zacchei, A.; Zonca, A..
We describe the legacy Planck cosmic microwave background (CMB) likelihoods derived from the 2018 data release. The overall approach is similar in spirit to the one retained for the 2013 and 2015 data release, with a hybrid method using different approximations at low (l< 30) and high (l >= 30) multipoles, implementing several methodological and data-analysis refinements compared to previous releases. With more realistic simulations, and better correction and modelling of systematic effects, we can now make full use of the CMB polarization observed in the High Frequency Instrument (HFI) channels. The low-multipole EE cross-spectra from the 100 GHz and 143 GHz data give a constraint on the Lambda CDM reionization optical-depth parameter tau to better...
Tipo: Text Palavras-chave: Cosmic background radiation; Cosmology: observations; Cosmological parameters; Methods: data analysis.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00654/76634/77784.pdf
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Planck 2018 results: VI. Cosmological parameters ArchiMer
Aghanim, N.; Akrami, Y.; Ashdown, M.; Aumont, J.; Baccigalupi, C.; Ballardini, M.; Banday, A. J.; Barreiro, R. B.; Bartolo, N.; Basak, S.; Battye, R.; Benabed, K.; Bernard, J. -p.; Bersanelli, M.; Bielewicz, P.; Bock, J. J.; Bond, J. R.; Borrill, J.; Bouchet, F. R.; Boulanger, F.; Bucher, M.; Burigana, C.; Butler, R. C.; Calabrese, E.; Cardoso, J. -f.; Carron, J.; Challinor, A.; Chiang, H. C.; Chluba, J.; Colombo, L. P. L.; Combet, C.; Contreras, D.; Crill, B. P.; Cuttaia, F.; De Bernardis, P.; De Zotti, G.; Delabrouille, J.; Delouis, Jean Marc; Di Valentino, E.; Diego, J. M.; Dore, O.; Douspis, M.; Ducout, A.; Dupac, X.; Dusini, S.; Efstathiou, G.; Elsner, F.; Ensslin, T. A.; Eriksen, H. K.; Fantaye, Y.; Farhang, M.; Fergusson, J.; Fernandez-cobos, R.; Finelli, F.; Forastieri, F.; Frailis, M.; Fraisse, A. A.; Franceschi, E.; Frolov, A.; Galeotta, S.; Galli, S.; Ganga, K.; Genova-santos, R. T.; Gerbino, M.; Ghosh, T.; Gonzalez-nuevo, J.; Gorski, K. M.; Gratton, S.; Gruppuso, A.; Gudmundsson, J. E.; Hamann, J.; Handley, W.; Hansen, F. K.; Herranz, D.; Hildebrandt, S. R.; Hivon, E.; Huang, Z.; Jaffe, A. H.; Jones, W. C.; Karakci, A.; Keihanen, E.; Keskitalo, R.; Kiiveri, K.; Kim, J.; Kisner, T. S.; Knox, L.; Krachmalnico, N.; Kunz, M.; Kurki-suonio, H.; Lagache, G.; Lamarre, J. -m.; Lasenby, A.; Lattanzi, M.; Lawrence, C. R.; Le Jeune, M.; Lemos, P.; Lesgourgues, J.; Levrier, F.; Lewis, A.; Liguori, M.; Lilje, P. B.; Lilley, M.; Lindholm, V.; Lopez-caniego, M.; Lubin, Pm; Ma, Y. -z.; Macias-perez, J. F.; Maggio, G.; Maino, D.; Mandolesi, N.; Mangilli, A.; Marcos-caballero, A.; Maris, M.; Martin, Pg; Martinelli, M.; Martinez-gonzalez, E.; Matarrese, S.; Mauri, N.; Mcewen, J. D.; Meinhold, P. R.; Melchiorri, A.; Mennella, A.; Migliaccio, M.; Millea, M.; Mitra, S.; Miville-deschenes, M. -a.; Molinari, D.; Montier, L.; Morgante, G.; Moss, A.; Natoli, P.; Norgaard-nielsen, H. U.; Pagano, L.; Paoletti, D.; Partridge, B.; Patanchon, G.; Peiris, H. V.; Perrotta, F.; Pettorino, V.; Piacentini, F.; Polastri, L.; Polenta, G.; Puget, J. -l.; Rachen, J. P.; Reinecke, M.; Remazeilles, M.; Renzi, A.; Rocha, G.; Rosset, C.; Roudier, G.; Rubino-martin, J. A.; Ruiz-granados, B.; Salvati, L.; Sandri, M.; Savelainen, M.; Scott, D.; Shellard, E. P. S.; Sirignano, C.; Sirri, G.; Spencer, L. D.; Sunyaev, R.; Suur-uski, A. -s.; Tauber, J. A.; Tavagnacco, D.; Tenti, M.; Toffolatti, L.; Tomasi, M.; Trombetti, T.; Valenziano, L.; Valiviita, J.; Van Tent, B.; Vibert, L.; Vielva, P.; Villa, F.; Vittorio, N.; Wandelt, B. D.; Wehus, I. K.; White, M.; White, S. D. M.; Zacchei, A.; Zonca, A..
CDM at over 2 sigma, which pulls some parameters that affect the lensing amplitude away from the Lambda CDM model; however, this is not supported by the lensing reconstruction or (in models that also change the background geometry) BAO data. The joint constraint with BAO measurements on spatial curvature is consistent with a flat universe, Omega (K)=0.001 +/- 0.002. Also combining with Type Ia supernovae (SNe), the dark-energy equation of state parameter is measured to be w(0)=-1.03 +/- 0.03, consistent with a cosmological constant. We find no evidence for deviations from a purely power-law primordial spectrum, and combining with data from BAO, BICEP2, and Keck Array data, we place a limit on the tensor-to-scalar ratio r(0.002)< 0.06. Standard big-bang...
Tipo: Text Palavras-chave: Cosmic background radiation; Cosmological parameters.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00654/76633/77785.pdf
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Planck 2018 results: XII. Galactic astrophysics using polarized dust emission ArchiMer
Aghanim, N.; Akrami, Y.; Alves, Mir; Ashdown, M.; Aumont, J.; Baccigalupi, C.; Ballardini, M.; Banday, A. J.; Barreiro, R. B.; Bartolo, N.; Basak, S.; Benabed, K.; Bernard, J. -p.; Bersanelli, M.; Bielewicz, P.; Bock, J. J.; Bond, J. R.; Borrill, J.; Bouchet, F. R.; Boulanger, F.; Bracco, A.; Bucher, M.; Burigana, C.; Calabrese, E.; Cardoso, J. -f.; Carron, J.; Chary, R. -r.; Chiang, H. C.; Colombo, L. P. L.; Combet, C.; Crill, B. P.; Cuttaia, F.; De Bernardis, P.; De Zotti, G.; Delabrouille, J.; Delouis, Jean Marc; Di Valentino, E.; Dickinson, C.; Diego, J. M.; Dore, O.; Douspis, M.; Ducout, A.; Dupac, X.; Efstathiou, G.; Elsner, F.; Ensslin, T. A.; Eriksen, H. K.; Falgarone, E.; Fantaye, Y.; Fernandez-cobos, R.; Ferriere, K.; Finelli, F.; Forastieri, F.; Frailis, M.; Fraisse, A. A.; Franceschi, E.; Frolov, A.; Galeotta, S.; Galli, S.; Ganga, K.; Genova-santos, R. T.; Gerbino, M.; Ghosh, T.; Gonzalez-nuevo, J.; Gorski, K. M.; Gratton, S.; Green, G.; Gruppuso, A.; Gudmundsson, J. E.; Guillet, V.; Handley, W.; Hansen, F. K.; Helou, G.; Herranz, D.; Hivon, E.; Huang, Z.; Jaffe, A. H.; Jones, W. C.; Keihanen, E.; Keskitalo, R.; Kiiveri, K.; Kim, J.; Krachmalnicoff, N.; Kunz, M.; Kurki-suonio, H.; Lagache, G.; Lamarre, J. -m.; Lasenby, A.; Lattanzi, M.; Lawrence, C. R.; Le Jeune, M.; Levrier, F.; Liguori, M.; Lilje, P. B.; Lindholm, V.; Lopez-caniego, M.; Lubin, Pm; Ma, Y. -z.; Macias-perez, J. F.; Maggio, G.; Maino, D.; Mandolesi, N.; Mangilli, A.; Marcos-caballero, A.; Maris, M.; Martin, Pg; Martinez-gonzalez, E.; Matarrese, S.; Mauri, N.; Mcewen, J. D.; Melchiorri, A.; Mennella, A.; Migliaccio, M.; Miville-deschenes, M. -a.; Molinari, D.; Moneti, A.; Montier, L.; Morgante, G.; Moss, A.; Natoli, P.; Pagano, L.; Paoletti, D.; Patanchon, G.; Perrotta, F.; Pettorino, V.; Piacentini, F.; Polastri, L.; Polenta, G.; Puget, J. -l.; Rachen, J. P.; Reinecke, M.; Remazeilles, M.; Renzi, A.; Ristorcelli, I.; Rocha, G.; Rosset, C.; Roudier, G.; Rubino-martin, J. A.; Ruiz-granados, B.; Salvati, L.; Sandri, M.; Savelainen, M.; Scott, D.; Sirignano, C.; Sunyaev, R.; Suur-uski, A. -s.; Tauber, J. A.; Tavagnacco, D.; Tenti, M.; Toffolatti, L.; Tomasi, M.; Trombetti, T.; Valiviita, J.; Vansyngel, F.; Van Tent, B.; Vielva, P.; Villa, F.; Vittorio, N.; Wandelt, B. D.; Wehus, I. K.; Zacchei, A.; Zonca, A..
Observations of the submillimetre emission from Galactic dust, in both total intensity I and polarization, have received tremendous interest thanks to the Planck full-sky maps. In this paper we make use of such full-sky maps of dust polarized emission produced from the third public release of Planck data. As the basis for expanding on astrophysical studies of the polarized thermal emission from Galactic dust, we present full-sky maps of the dust polarization fraction p, polarization angle psi, and dispersion function of polarization angles ?. The joint distribution (one-point statistics) of p and N-H confirms that the mean and maximum polarization fractions decrease with increasing N-H. The uncertainty on the maximum observed polarization fraction, (max) =...
Tipo: Text Palavras-chave: Polarization; Magnetic fields; Turbulence; Dust; Extinction; Local insterstellar matter; Submillimeter: ISM.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00654/76632/77786.pdf
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Planck intermediate results: LV. Reliability and thermal properties of high-frequency sources in the Second Planck Catalogue of Compact Sources ArchiMer
Akrami, Y.; Ashdown, M.; Aumont, J.; Baccigalupi, C.; Ballardini, M.; Banday, A. J.; Barreiro, R. B.; Bartolo, N.; Basak, S.; Benabed, K.; Bernard, J-p; Bersanelli, M.; Bielewicz, P.; Bond, J. R.; Borrill, J.; Bouchet, F. R.; Burigana, C.; Calabrese, E.; Carvalho, P.; Chiang, H. C.; Crill, B. P.; Cuttaia, F.; De Rosa, A.; De Zotti, G.; Delabrouille, J.; Delouis, Jean Marc; Di Valentino, E.; Diego, J. M.; Dupac, X.; Dusini, S.; Efstathiou, G.; Elsner, F.; Ensslin, T. A.; Eriksen, H. K.; Fernandez-cobos, R.; Finelli, F.; Fraisse, A. A.; Franceschi, E.; Frolov, A.; Galeotta, S.; Ganga, K.; Gerbino, M.; Gonzalez-nuevo, J.; Gorski, K. M.; Gratton, S.; Gruppuso, A.; Gudmundsson, J. E.; Handley, W.; Hansen, F. K.; Herranz, D.; Hivon, E.; Hobson, M.; Huang, Z.; Jones, W. C.; Keihanen, E.; Keskitalo, R.; Kim, J.; Kisner, T. S.; Krachmalnicoff, N.; Kunz, M.; Kurki-suonio, H.; Lamarre, J-m; Lasenby, A.; Lattanzi, M.; Lawrence, C. R.; Le Jeune, M; Levrier, F.; Lilje, P. B.; Lindholm, V; Lopez-caniego, M.; Ma, Y-z; Macias-perez, J. F.; Maggio, G.; Mandolesi, N.; Marcos-caballero, A.; Maris, M.; Martin, Pg; Martinez-gonzalez, E.; Matarrese, S.; Mauri, N.; Mcewen, J. D.; Migliaccio, M.; Molinari, D.; Moneti, A.; Montier, L.; Morgante, G.; Natoli, P.; Paoletti, D.; Partridge, B.; Perrotta, F.; Pettorino, V; Piacentini, F.; Polenta, G.; Puget, J-l; Rachen, J. P.; Reinecke, M.; Remazeilles, M.; Renzi, A.; Rocha, G.; Roudier, G.; Ruiz-granados, B.; Savelainen, M.; Scott, D.; Sirri, G.; Spencer, L. D.; Suur-uski, A-s; Tauber, J. A.; Tavagnacco, D.; Tenti, M.; Toffolatti, L.; Tomasi, M.; Trombetti, T.; Valiviita, J.; Van Tent, B.; Vielva, P.; Villa, F.; Wehus, I. K.; Zacchei, A.; Zonca, A..
We describe an extension of the most recent version of the Planck Catalogue of Compact Sources (PCCS2), produced using a new multi-band Bayesian Extraction and Estimation Package (BeeP). BeeP assumes that the compact sources present in PCCS2 at 857 GHz have a dust-like spectral energy distribution (SED), which leads to emission at both lower and higher frequencies, and adjusts the parameters of the source and its SED to fit the emission observed in Planck's three highest frequency channels at 353, 545, and 857 GHz, as well as the IRIS map at 3000 GHz. In order to reduce confusion regarding diffuse cirrus emission, BeeP's data model includes a description of the background emission surrounding each source, and it adjusts the confidence in the source...
Tipo: Text Palavras-chave: Catalogs; Cosmology: observations; Submillimeter: general.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00666/77840/80013.pdf
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Reionization optical depth determination from Planck HFI data with ten percent accuracy ArchiMer
Pagano, L.; Delouis, Jean Marc; Mottet, S.; Puget, J. -l.; Vibert, L..
We present an estimation of the reionization optical depth tau from an improved analysis of data from the High Frequency Instrument (HFI) on board the Planck satellite. By using an improved version of the HFI map-making code, we greatly reduce the residual large-scale contamination a ffecting the data, characterised in, but not fully removed from, the Planck 2018 legacy release. This brings the dipole distortion systematic e ffect, contaminating the very low multipoles, below the noise level. On large-scale polarization-only data, we measure tau = 0.0566(-0).(+0)(0062).(0053) at 68% C.L., reducing the Planck 2018 legacy release uncertainty by similar to 40%. Within the Lambda CDM model, in combination with the Planck large-scale temperature likelihood, and...
Tipo: Text Palavras-chave: Cosmic background radiation dark ages; Reionization; First stars methods: data analysis.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00621/73263/72475.pdf
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SKIM, a Candidate Satellite Mission Exploring Global Ocean Currents and Waves ArchiMer
Ardhuin, Fabrice; Brandt, Peter; Gaultier, Lucile; Donlon, Craig; Battaglia, Alessandro; Boy, François; Casal, Tania; Chapron, Bertrand; Collard, Fabrice; Cravatte, Sophie; Delouis, Jean Marc; De Witte, Erik; Dibarboure, Gerald; Engen, Geir; Johnsen, Harald; Lique, Camille; Lopez-dekker, Paco; Maes, Christophe; Martin, Adrien; Marié, Louis; Menemenlis, Dimitris; Nouguier, Frederic; Peureux, Charles; Rampal, Pierre; Ressler, Gerhard; Rio, Marie-helene; Rommen, Bjorn; Shutler, Jamie D.; Suess, Martin; Tsamados, Michel; Ubelmann, Clement; Van Sebille, Erik; Van Den Oever, Martin; Stammer, Detlef.
The Sea surface KInematics Multiscale monitoring (SKIM) satellite mission is designed to explore ocean surface current and waves. This includes tropical currents, notably the poorly known patterns of divergence and their impact on the ocean heat budget, and monitoring of the emerging Arctic up to 82.5°N. SKIM will also make unprecedented direct measurements of strong currents, from boundary currents to the Antarctic circumpolar current, and their interaction with ocean waves with expected impacts on air-sea fluxes and extreme waves. For the first time, SKIM will directly measure the ocean surface current vector from space. The main instrument on SKIM is a Ka-band conically scanning, multi-beam Doppler radar altimeter/wave scatterometer that includes a...
Tipo: Text Palavras-chave: Ocean current; Tropics; Arctic; Doppler; Altimetry; Sea state; Remote sensing; Ocean waves.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00498/60964/64372.pdf
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SRo112: an improved mapmaking approach to reduce large-scale systematic effects in the Planck High Frequency Instrument legacy maps ArchiMer
Delouis, Jean Marc; Pagano, L.; Mottet, S.; Puget, J-l; Vibert, L..
This paper describes an improved map making approach with respect to the one used for the Planck High Frequency Instrument 2018 Legacy release. The algorithm SRo112 better corrects the known instrumental effects that still affected mostly the polarized large-angular-scale data by distorting the signal, and/or leaving residuals observable in null tests. The main systematic effect is the nonlinear response of the onboard analog-to-digital convertors that was cleaned in the Planck HFI Legacy release as an empirical time-varying linear detector chain response which is the first-order effect. The SRo112 method fits the model parameters for higher-order effects and corrects the full distortion of the signal. The model parameters are fitted using the redundancies...
Tipo: Text Palavras-chave: Cosmology: observations; Cosmic background radiation; Surveys; Methods: data analysis.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00513/62482/66802.pdf
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Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

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