Cryosat-2 for Inland Water Applications – Potential, Challenges and Future Prospects
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Back to the the Future? 07> Probing the Kuiper Belt
SpaceFlight A British Interplanetary Society publication Volume 62 No.7 July 2020 £5.25 SPACE PLANES: back to the the future? 07> Probing the Kuiper Belt 634089 The man behind the ISS 770038 Remembering Dr Fred Singer 9 CONTENTS Features 16 Multiple stations pledge We look at a critical assessment of the way science is conducted at the International Space Station and finds it wanting. 18 The man behind the ISS 16 The Editor reflects on the life of recently Letter from the Editor deceased Jim Beggs, the NASA Administrator for whom the building of the ISS was his We are particularly pleased this supreme achievement. month to have two features which cover the spectrum of 22 Why don’t we just wing it? astronautical activities. Nick Spall Nick Spall FBIS examines the balance between gives us his critical assessment of winged lifting vehicles and semi-ballistic both winged and blunt-body re-entry vehicles for human space capsules, arguing that the former have been flight and Alan Stern reports on his grossly overlooked. research at the very edge of the 26 Parallels with Apollo 18 connected solar system – the Kuiper Belt. David Baker looks beyond the initial return to the We think of the internet and Moon by astronauts and examines the plan for a how it helps us communicate and sustained presence on the lunar surface. stay in touch, especially in these times of difficulty. But the fact that 28 Probing further in the Kuiper Belt in less than a lifetime we have Alan Stern provides another update on the gone from a tiny bleeping ball in pioneering work of New Horizons. -
SP-717 Cryosat 2013
ANALYSIS OF THE IN-FLIGHT INJECTION OF THE LISA PATHFINDER TEST-MASS INTO A GEODESIC Daniele Bortoluzzi (1,2) on behalf of the LISA Pathfinder Collaboration(*), Davide Vignotto (1), Andrea Zambotti (1), Ingo Köker(3), Hans Rozemeijer(4), Jose Mendes(4), Paolo Sarra(5), Andrea Moroni(5), Paolo Lorenzi(5) (1) University of Trento, Department of Industrial Engineering, via Sommarive, 9 - 38123 Trento, Email: [email protected], [email protected], [email protected] (2) Trento Institute for Fundamental Physics and Application / INFN, Italy. (3) AIRBUS DS GmbH, Willy-Messerschmitt-Strasse 1 Ottobrunn, 85521, Germany, Email: [email protected] (4) European Space Operations Centre, European Space Agency, 64293 Darmstadt, Germany, Email: [email protected], [email protected] (5) OHB Italia S.p.A., via Gallarate, 150 – 20151 Milano, Italy, Email: [email protected], [email protected], [email protected] (*) Full list and affiliations attached in the end of the document ABSTRACT surroundings housing. The sensing body, from the locked condition, has then to LISA Pathfinder is a mission that demonstrates some key be released into free-fall to start the in-flight operations; technologies for the measurement of gravitational waves. as a consequence, the release into free-fall of the proof The mission goal is to set two test masses (TMs) into mass is a critical aspect for these missions, since it is a purely geodesic trajectories. The grabbing positioning necessary step to start the science phase. Different and release mechanism (GPRM) grabs and releases each technologies are nowadays available to perform a release TM from any position inside its housing. -
2. an Approach to Antarctic Glacial History: the Aims of Leg 1781
Barker, P.F., Camerlenghi, A., Acton, G.D., et al., 1999 Proceedings of the Ocean Drilling Program, Initial Reports Volume 178 2. AN APPROACH TO ANTARCTIC GLACIAL HISTORY: THE AIMS OF LEG 1781 P.F. Barker2 and A. Camerlenghi3 Ocean Drilling Program (ODP) Leg 178 was proposed partly as an examination of Antarctic Peninsula glacial history and partly as a test of the strategy of determining this history by sampling glacially trans- ported sediments at the continental margin. If successful, it could lead to a program of two or three other legs around Antarctica that, in com- bination, might determine the long-term history of the entire Antarctic Ice Sheet. Leg 178 also had a second objective: to obtain a long, high- resolution record of Holocene climate from Palmer Deep, an isolated deep basin on the inner continental shelf. The proposal that became Leg 178 was therefore based on several assumptions, described below. Briefly, they are: 1. The Antarctic Ice Sheet is now and has been throughout its ex- istence an important component of the Earth’s climate engine, which it is necessary to document and understand. 2. An understanding of the ice sheet’s function and what controls its development cannot be obtained until its history is known. 3. Existing knowledge of Antarctic glacial history, derived largely from sparse onshore data and low-latitude climate proxies, is in- adequate and ambiguous; the proxies themselves disagree. Fur- thermore, continued use of the same proxies and onshore data is unlikely to resolve present ambiguities and disputes. 1Examples of how to reference the 4. -
Roll Calibration for Cryosat-2: a Comprehensive Approach
remote sensing Technical Note Roll Calibration for CryoSat-2: A Comprehensive Approach Albert Garcia-Mondéjar 1,* , Michele Scagliola 2 , Noel Gourmelen 3,4 , Jerome Bouffard 5 and Mònica Roca 1 1 isardSAT S.L., Barcelona Advanced Industry Park, 08042 Barcelona, Spain; [email protected] 2 Aresys SRL, 20132 Milano, Italy; [email protected] 3 School of GeoSciences, University of Edinburgh, Drummond Street, Edinburgh EH8 9XP, UK; [email protected] 4 IPGS UMR 7516, Université de Strasbourg, CNRS, 67000 Strasbourg, France 5 ESA ESRIN, 00044 Frascati, Italy; [email protected] * Correspondence: [email protected] Abstract: CryoSat-2 is the first satellite mission carrying a high pulse repetition frequency radar altimeter with interferometric capability on board. Across track interferometry allows the angle to the point of closest approach to be determined by combining echoes received by two antennas and knowledge of their orientation. Accurate information of the platform mispointing angles, in particular of the roll, is crucial to determine the angle of arrival in the across-track direction with sufficient accuracy. As a consequence, different methods were designed in the CryoSat-2 calibration plan in order to estimate interferometer performance along with the mission and to assess the roll’s contribution to the accuracy of the angle of arrival. In this paper, we present the comprehensive approach used in the CryoSat-2 Mission to calibrate the roll mispointing angle, combining analysis from external calibration of both man-made targets, i.e., transponder and natural targets. The roll calibration approach for CryoSat-2 is proven to guarantee that the interferometric measurements are exceeding the expected performance. -
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Research. Innovation. Sustainability PLANS FOR A NEW WAVE OF EUROPEAN SENTINEL SATELLITES The most ambitious and comprehensive plans ever for the European space sector, were approved at the end of 2019, with a total budget of ¤14.5 billion for the European Space Agency for the next three years – a 20% increase over the previous three-year budget. The decision allows a direct uplift to Europe’s Earth observation capability, expanding Copernicus – the European Union’s flagship Earth observation programme – with a suite of new, high-priority satellite missions. In this explainer we delve into the improvements and what they mean for sustainability and climate science. What is the Copernicus Programme? Copernicus is the European Union’s Earth observation programme, coordinated by the European Commission in partnership with the European Space Agency (ESA), EU Member States and other EU Agencies. Established in 2014, it builds on ESA’s Global Monitoring for Environment and Security (GMES) programme. Copernicus encompasses a system of satellites, airborne data, and ground stations supplying global monitoring data and operational services on a free-of-charge basis across six themes: atmosphere, marine, land, climate, emergency response and security. The Sentinel System – new and improved At the centre of the programme sits the Copernicus Space Component, which includes a family of satellites known collectively as Sentinels. These spacecraft provide routine atmospheric, oceanic, cryosphere and land global monitoring data, which are made freely available for Copernicus Services and major research and commercial applications such as precision farming, environmental hazards monitoring, weather forecasting and climate resilience. The soon-to-be-expanded Sentinel system will incorporate six high-priority missions. -
Sentinel-3 Product Notice
Copernicus S3 Product Notice – Altimetry Mission S3 Sensor SRAL / MWR Product LAND L2 NRT, STC and NTC Product Notice ID S3A.PN-STM-L2L.10 Issue/Rev Date 16/07/2020 Version 1.1 This Product Notice was prepared by the S3 Mission Performance Centre Preparation and ESA experts Approval ESA Mission Management Summary This is a Product Notice (PN) for the Copernicus Sentinel-3A and Sentinel-3B Surface Topography Mission (STM) Level-2 Land products at Near Real Time (NRT), Short Time Critical (STC) and Non Time Critical (NTC) timeliness. The Notice describes the STM current status, product quality and limitations, and product availability status. © ESA page 1 / 16 Processing Baseline S3A S3B Processing Baseline • Processing Baseline: 2.68 • Processing Baseline: 1.42 • • SR_1 IPF version: 06.18 SR_1 IPF version: 06.18 • MW_1 IPF version: 06.11 IPFs version • MW_1 IPF version: 06.11 • • SM_2 IPF version: 06.19 SM_2 IPF version: 06.19 Current Operational Processing Baseline IPF IPF Version In OPE since S3A SR1 06.18 Land Centres: NRT mode : 2020-07-09 STC mode : 2020-07-09 NTC mode : 2020-07-09 S3A MW1 06.11 Land Centres: NRT mode : 2020-01-21 STC mode : 2020-01-21 NTC mode : 2020-01-21 S3A SM2 06.19 Land Centres: NRT mode : 2020-07-09 STC mode : 2020-07-09 NTC mode : 2020-07-09 S3B SR1 06.18 Land Centres: NRT mode : 2020-07-09 STC mode : 2020-07-09 NTC mode : 2020-07-09 S3B MW1 06.11 Land Centres: NRT mode : 2020-01-21 STC mode : 2020-01-21 NTC mode : 2020-01-21 S3B SM2 06.19 Land Centres: NRT mode : 2020-07-09 STC mode : 2020-07-09 NTC mode : 2020-07-09 © ESA page 2 / 16 Status of the Processing Baseline S3A The Processing Baseline (PB) for Copernicus Sentinel-3A STM products associated to this PN is reported above. -
About the Consistency Between Envisat and Cryosat-2 Radar Freeboard Retrieval Over Antarctic Sea Ice
The Cryosphere, 10, 1415–1425, 2016 www.the-cryosphere.net/10/1415/2016/ doi:10.5194/tc-10-1415-2016 © Author(s) 2016. CC Attribution 3.0 License. About the consistency between Envisat and CryoSat-2 radar freeboard retrieval over Antarctic sea ice Sandra Schwegmann1, Eero Rinne2, Robert Ricker1, Stefan Hendricks1, and Veit Helm1 1Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany 2Finnish Meteorological Institute, Marine Research, Erik Palménin aukio 1, 00560 Helsinki, Finland Correspondence to: Sandra Schwegmann ([email protected]) Received: 26 June 2015 – Published in The Cryosphere Discuss.: 16 September 2015 Revised: 6 June 2016 – Accepted: 8 June 2016 – Published: 8 July 2016 Abstract. Knowledge about Antarctic sea-ice volume and its 1 Introduction changes over the past decades has been sparse due to the lack of systematic sea-ice thickness measurements in this Over the last 3 decades, sea-ice extent (SIE) in the Arctic remote area. Recently, first attempts have been made to de- has decreased and submarine ice draft measurements indi- velop a sea-ice thickness product over the Southern Ocean cate that also sea-ice volume is declining (Rothrock et al., from space-borne radar altimetry and results look promising. 1999, 2008; Lindsay and Schweiger, 2015). In the Antarctic, Today, more than 20 years of radar altimeter data are poten- in contrast, SIE is increasing, but little is known about the tially available for such products. However, the characteris- changes in sea-ice volume. This is due to the lack of system- tics of individual radar types differ for the available altimeter atic sea-ice thickness measurements in the Southern Hemi- missions. -
Exploring the Benefits of Using Cryosat-2'S Cross-Track
JULY 2013 D I B A R B O U R E E T A L . 1511 Exploring the Benefits of Using CryoSat-2’s Cross-Track Interferometry to Improve the Resolution of Multisatellite Mesoscale Fields G. DIBARBOURE CLS, Ramonville St-Agne, France P. Y. LE TRAON IFREMER, Plouzane, France N. GALIN Centre for Polar Observation and Modelling, Department of Earth Sciences, University College London, London, United Kingdom (Manuscript received 7 August 2012, in final form 12 January 2013) ABSTRACT Sea surface height (SSH) measurements provided by pulse-limited radar altimeters are one-dimensional profiles along the satellite’s nadir track, with no information whatsoever in the cross-track direction. The anisotropy of resulting SSH profiles is the most limiting factor of mesoscale SSH maps that merge the 1D profiles. This paper explores the potential of the cross-track slope derived from the Cryosphere Satellite-2 (CryoSat- 2)’s synthetic aperture radar interferometry (SARin) mode to increase the resolution of mesoscale fields in the cross-track direction. Through idealized 1D simulations, this study shows that it is possible to exploit the dual SARin measurement (cross-track slope and SSH profile) in order to constrain mesoscale mapping in the cross-track direction. An error-free SSH slope allows a single SARin instrument to recover almost as much SSH variance as two coordinated altimeters. Noise-corrupted slopes can also be exploited to improve the mapping, and a break- through is observed for SARin errors ranging from 1 to 5 mrad for 150-km-radius features in strong currents, and 0.1–0.5 mrad for global mesoscale. -
Europe's Earth Observation, Satellite Navigation and Communications
Europe’s Earth Observation, Satellite Navigation and Communications Missions and Services for the benefit of the Arctic Inventory of current and future capabilities, their synergies and societal benefits Boniface, K., Gioia, C. Pozzoli, L., Diehl, T., Dobricic, S., Fortuny Guasch, J., Greidanus, H., Kliment, T., Kucera, J., Janssens- Maenhout, G., Soille, P., Strobl, P., and Wilson, J. 2021 EUR 30629 EN This publication is a Technical report by the Joint Research Centre (JRC), the European Commission’s science and knowledge service. It aims to provide evidence-based scientific support to the European policymaking process. The scientific output expressed does not imply a policy position of the European Commission. Neither the European Commission nor any person acting on behalf of the Commission is responsible for the use that might be made of this publication. For information on the methodology and quality underlying the data used in this publication for which the source is neither Eurostat nor other Commission services, users should contact the referenced source. The designations employed and the presentation of material on the maps do not imply the expression of any opinion whatsoever on the part of the European Union concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Contact information Name: Karen Boniface Address: European Commission, Joint Research Centre, Directorate E: Space, Security and Migration Email: [email protected] Tel.: +39-0332-785295 EU Science Hub https://ec.europa.eu/jrc JRC121206 EUR 30629 EN PDF ISBN 978-92-76-32079-1 ISSN 1831-9424 doi:10.2760/270136 Luxembourg: Publications Office of the European Union, 2021 © European Union, 2021 The reuse policy of the European Commission is implemented by the Commission Decision 2011/833/EU of 12 December 2011 on the reuse of Commission documents (OJ L 330, 14.12.2011, p. -
ESA Propulsion Lab at ESTEC
ESA Propulsion Lab at ESTEC IEPC-2009-236 Presented at the 31st International Electric Propulsion Conference, University of Michigan • Ann Arbor, Michigan • USA September 20 – 24, 2009 J. Gonzalez del Amo*, G. Saccoccia† and P.-E. Frigot‡ European Space Agency, ESTEC, Keplerlaan 1, 2201 AG Noordwijk, The Netherlands Abstract: Electric and chemical propulsion systems are very important for spacecraft applications. Performance and reliability of propulsion systems are two main areas that have to be demonstrated to any space project. Europe is developing several types of electric and chemical thrusters for application to many satellites. Design, manufacturing and testing of such thrusters is a complex activity that requires a great effort. Full characterisation, qualification, acceptance and plume interaction tests are mandatory in the full assessment of these technologies. The ESA Propulsion Laboratory (EPL) is an operational facility at ESTEC in the spacecraft propulsion testing field. The EPL provides test services to the ESA Propulsion and Aerothermodynamics Division, which is responsible at European Space Agency for R&D activities and support to projects in the areas of chemical propulsion, electric and advanced propulsion and aerothermodynamics. When applicable, the EPL also provides technical advice and support to external organisations for subjects related to propulsion testing and test facilities. A laboratory dedicated to electric propulsion exists at ESTEC since early 1980s. In the last years, the activities of the laboratory, under project request, have been expanded to chemical propulsion (cold gas and other non-toxic propellants). During 2004, EPL has obtained dual ISO 17025 accreditation and ISO 9001 certification. In 2007 the EPL changed its physical location and several tests were performed in order to validate the correct functioning of the facilities This paper will describe the EPL organisation, facilities and activities after the physical relocation. -
Andrew F. Thompson
Andrew F. Thompson Assistant Professor of Environmental Science and Engineering Division of Geological and Planetary Sciences California Institute of Technology, Pasadena, CA 91125 Research Interests Circulation of the Southern Ocean and the Antarctic margins. Mesoscale and submesoscale ocean dynamics. Physical-biological interactions in ocean boundary layers. Turbulence and variability generated by ocean-ice interactions. Long-term evolution of the global overturning circulation. Professional Preparation 2006: Ph.D., Physical Oceanography, Scripps Institution of Oceanography, San Diego, CA 2002: MPhil., Fluid Flow, University of Cambridge, UK 2001: MMath., University of Cambridge, Cambridge UK 2000: B.A., Engineering Sciences, Dartmouth College, Hanover, NH Appointments 2011-present: Assistant Professor, California Institute of Technology 2010-2011: NERC Advanced Research Fellow, British Antarctic Survey 2007-2010: NERC Postdoctoral Fellow, University of Cambridge 2006-2007: Senior Research Assosciate, University of East Anglia 2002-2006: Graduate Research Assistant, Scripps Institution of Oceanography 2000-2002: Keasbey Memorial Fellow, Trinity College, University of Cambridge Honors 2014: Packard Fellowship for Science and Engineering 2013: AGU Ocean Sciences Early Career Award 2010: Natural Environment Research Council Advanced Fellowship 2007: Natural Environment Research Council Postdoctoral Fellowship 2006: Outstanding Student Paper Award, AGU Ocean Sciences Meeting 2003: Woods Hole Oceanographic Institution Geophysical Fluid Dynamics Fellowship 2002: National Defense Science and Engineering Graduate (NDSEG) Fellowship 2000: Keasbey Memorial Scholarship Publications (y indicates student or postdoc) Updated publication list available at: http://web.gps.caltech.edu/∼andrewt/publications.html Manucharyan, G.E.y, A.F. Thompson & M.A. Spall, 2016. Eddy-memory mode of multi-decadal variability in residual-mean ocean circulations with applications to the Beaufort Gyre. -
Regional Profile of the MLPA South Coast Study Region (Point Conception to the California-Mexico Border)
California Marine Life Protection Act Initiative Regional Profile of the MLPA South Coast Study Region (Point Conception to the California-Mexico Border) June 25, 2009 This is the 2nd printed edition, June 25, 2009. First printed edition September 15, 2008. California Marine Life Protection Act Initiative c/o California Natural Resources Agency 1416 Ninth Street, Suite 1311 Sacramento, CA 95814 http://www.dfg.ca.gov /mlpa [email protected] Acknowledgements and credits: The Marine Life Protection Act Initiative thanks the many persons and organizations who supplied information in response to the first printed draft of this profile. Credits for cover photos: Garibaldi and kelp – iStockphoto/Tammy Peluso; Starfish – Reuben E. Reynoso; Coast – iStockphoto/Amy Dala; Shore fisher – iStockphoto/David Gunn; Pelican – iStockphoto/Robert Deal; Santa Barbara Harbor – iStockphoto/Chris Scredon; Surfer – iStockphoto/Ian McDonnell How to Use This Document This is the second printed edition of the Regional Profile of the South Coast Study Region (Point Conception to the California-Mexico Border). Both versions have been created with the intention of supplying stakeholders with knowledge crucial to the process of developing and evaluating proposals for Marine Protected Areas in the study region. How We Have Made the Book Easier to Use The list of acronyms and abbreviations has been placed inside the back cover, where it is easy to find. We have made it easier to find the full details for works cited in the text. In all cases in which an organization is cited by an acronym, we have inserted the the full reference in the References Cited list by exactly the acronym used in the inline citation in the text.