2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS)最新文献

{"title":"Adaptive optics pre-compensation for GEO feeder links: Towards an experimental demonstration","authors":"N. Védrenne, J. Conan, A. Bonnefois, C. Petit, M. Velluet, V. Michau","doi":"10.1109/ICSOS.2017.8357215","DOIUrl":"https://doi.org/10.1109/ICSOS.2017.8357215","url":null,"abstract":"High throughput ground to GEO satellite telecommunication systems will require very capacitive links for the uplink. When diffraction limited, a few optical Watts per channel are sufficient to close the link budget. In the presence of atmospheric turbulence, higher emission powers are necessary to cope with the subsequent disruptions of the beam. Pre-compensation by adaptive optics has been identified as a key strategy to keep the requested power at reasonable levels. However its performance is limited by point-ahead anisoplanatism. Fine trade-offs shall be carried out to overcome this limitation while considering the specificities of optical telecommunication requirements (low fading probably, short fading duration, manageable cost and complexity). The expected performance of the pre-compensation by adaptive optics for optical feeder links is investigated through numerical simulations. A ground-to-ground experimental demonstration is proposed. The selected slant line of sight and the beam geometry is shown to induce turbulence effects, including angular decorrelation, that are representative of the GEO feeder link scenario when considering an appropriate setup.","PeriodicalId":397803,"journal":{"name":"2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130065811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An update on the CCSDS optical communications working group","authors":"B. Edwards, R. Daddato, Klaus-Jürgen Schulz, C. Schmidt, J. Hamkins, D. Giggenbach, B. Robinson, L. Braatz, R. Alliss","doi":"10.1109/ICSOS.2017.8357202","DOIUrl":"https://doi.org/10.1109/ICSOS.2017.8357202","url":null,"abstract":"International space agencies around the world are currently developing optical communication systems for Near Earth and Deep Space applications for both robotic and human-rated spacecraft. These applications include both links between spacecraft and links between spacecraft and ground. The Interagency Operation Advisory Group (IOAG) has stated that there is a strong business case for international cross support of spacecraft optical links. It further concluded that in order to enable cross support the links must be standardized. This paper will overview the history and structure of the space communications international standards body, the Consultative Committee for Space Data Systems (CCSDS), that will develop the standards and provide an update on the proceedings of the Optical Communications Working Group within CCSDS. This paper will also describe the set of optical communications standards being developed and outline some of the issues that must be addressed in the next few years. The paper will address, in particular, the ongoing work on application scenarios for deep space to ground called High Photon Efficiency, for LEO to ground called Low Complexity, for inter-satellite and near Earth to ground called High Data Rate, as well as associated atmospheric measurement techniques and link operations concepts.","PeriodicalId":397803,"journal":{"name":"2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126115338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LCRD optical ground station 1","authors":"W. Roberts, S. Piazzolla","doi":"10.1109/ICSOS.2017.8357216","DOIUrl":"https://doi.org/10.1109/ICSOS.2017.8357216","url":null,"abstract":"NASA's Laser Communications Relay Demonstration (LCRD) will demonstrate and study bi-directional space-to-ground optical links. Optical Ground Station 1 (OGS-1) for LCRD will be developed at the Optical Communications Telescope Laboratory (OCTL), a 1-meter telescope in the San Gabriel Mountains northeast of the Jet Propulsion Laboratory. This paper will present an updated overview of OGS-1, its systems and capabilities, and its preparations for integrating and verifying readiness of the completed system. It will conclude with predicted performance of the OGS-1 system.","PeriodicalId":397803,"journal":{"name":"2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131654506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using optical communications links for deep-space navigation","authors":"T. Martin-Mur, C. Zhai, C. Jacobs, S. Turyshev, M. Shao, Michael Peng, S. McCandless, R. Karimi","doi":"10.1109/ICSOS.2017.8357231","DOIUrl":"https://doi.org/10.1109/ICSOS.2017.8357231","url":null,"abstract":"Optical communications systems that are being developed for deep-space missions could also be used to perform deep-space navigation. A two-way optical communications system could be modified to support ranging, and the laser signal emitted by a spacecraft could be tracked against background stars to perform plane-of-sky observables. We have been analyzing a number of deep-space navigation scenarios to understand the advantages and disadvantages of using optical communication systems for navigation. Our objectives were to evaluate the performance achievable with optical systems, and to study under what circumstances these systems could be sufficient to navigate the mission, reducing the requirements for radio systems to perhaps just to be a backup for emergency communications.","PeriodicalId":397803,"journal":{"name":"2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS)","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129765191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance evaluation of coded transmission for adaptive-optics corrected satellite-to-ground laser links","authors":"Canuet Lucien, Lacan Jérôme, V. Nicolas, Rissons Angélique, G. Artaud","doi":"10.1109/ICSOS.2017.8357214","DOIUrl":"https://doi.org/10.1109/ICSOS.2017.8357214","url":null,"abstract":"Performance estimation of coded LEO satellite-to-ground laser transmissions partially corrected by adaptive-optics are presented. Through numerical simulations, the conjugation of adaptive-optics with a cross-layering optimization of data reliability mechanisms is investigated. The emphasis is put on the minimization of the data memories required at both the transmitter and the receiver in order to guarantee an error-free downlink.","PeriodicalId":397803,"journal":{"name":"2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116236996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physical layer performance assessment of free-space optical communications links","authors":"G. Artaud, N. Védrenne, R. Le Bidan, M. Velluet, L. Pailler","doi":"10.1109/ICSOS.2017.8357399","DOIUrl":"https://doi.org/10.1109/ICSOS.2017.8357399","url":null,"abstract":"This article investigates practical methods to assess and compare different candidate physical layers for free-space optical transmissions. The example of an OOK signal with a simple APD receiver is used as a guiding case study throughout the paper. In this particular configuration only the signal fluctuations (scintillations) induced by the propagation of the optical link through atmospheric turbulence impact the optical signal. The first part of the paper discusses the type of data upon which physical layer evaluation can be conducted. It describes experimental data obtained from field trial and synthetic time series obtained from atmospheric propagation channel simulators. In the second part of the paper, a practical methodology is introduced to evaluate off-line physical layer performance on experimental data records. The final part of the paper presents the application of the proposed methodology to the case study under consideration. Specifically, the receiver model is first introduced. Then, the performance of different forward-error correction (FEC) codes is evaluated on selected uncoded transmission experiments records.","PeriodicalId":397803,"journal":{"name":"2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128766397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Status of NASA's deep space optical communication technology demonstration","authors":"A. Biswas, M. Srinivasan, R. Rogalin, S. Piazzolla, John Y. Liu, B. Schratz, A. Wong, E. Alerstam, M. Wright, W. Roberts, J. Kovalik, G. Ortiz, A. Na-Nakornpanom, M. Shaw, C. Okino, K. Andrews, Michael Peng, David S. Orozco, W. Klipstein","doi":"10.1109/ICSOS.2017.8357206","DOIUrl":"https://doi.org/10.1109/ICSOS.2017.8357206","url":null,"abstract":"With NASA funding, the Deep Space Optical Communication (DSOC) Project at JPL is planning a system level technology demonstration of optical communications from deep space. A 22 cm diameter flight laser transceiver (FLT) is being developed for space flight. The FLT will be designed to transmit an average laser power of 4W at 1550 nm and receive a weak 1064 nm laser signal (> 100 femtowatts). Use of the Hale telescope at Palomar Mountain, CA, retrofitted with a photon-counting receiver to detect the downlink from space, is planned. The Optical Communication Telescope Laboratory (OCTL) at Table Mountain, CA will transmit a 1064 nm laser beacon to serve as a pointing reference for the FLT and support low-rate uplink data-rates. The DSOC FLT is part of the baseline payload for the Psyche mission spacecraft recently selected for flight by NASA, providing link demonstration opportunities during the mission cruise phase. Link demonstration opportunities at distances of approximately 0.1 to 2 astronomical units (AU) are expected. The DSOC system is being designed to support downlink data-rates of 0.2 to > 200 Mb/s and uplink data rates of approximately 1.6 kb/s. A status update of DSOC Project activities on flight and ground development will be summarized in this paper.","PeriodicalId":397803,"journal":{"name":"2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132761720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deep-space Optical Communication System (DOCS) for ESA's Space Weather mission to Lagrange orbit L5","authors":"Z. Sodnik, C. Heese, Pantelis-Daniel M. Arapoglou, Klaus-Jürgen Schulz, I. Zayer, R. Daddato, S. Kraft","doi":"10.1109/ICSOS.2017.8357207","DOIUrl":"https://doi.org/10.1109/ICSOS.2017.8357207","url":null,"abstract":"ESA plans to embark the Deep-space Optical Communications System (DOCS) on the Space WEather (SWE) mission to the Sun-Earth Lagrange point L5 in the frame of its Space Situational Awareness (SSA) program. DOCS is an in-orbit technology demonstration that also serves a scientific objective, namely the transfer of high-resolution solar imagery. The characteristics of the SWE L5 mission provide substantial advantages for deep-space optical communication, because the equidistant triangular orbital geometry between the sun, the Earth, and L5 (all three distances are equal to 1 AU ≈ 150 million km) ensures that the sun is always separated by 60 degrees from both the space and the ground terminal. This allows for very efficient solar stray-light shielding and thermal management. It also reduces the pointing requirements of the DOCS Space Terminal (DST); a coarse pointing mechanism is not required, nor is a point-ahead assembly. The SSA SWE L5 mission Phase A, Phase B1 and B2 studies to be conducted 2017–2019 will take into account the accommodation and interfacing of the DST. DOCS aims to demonstrate a data rate of 10 Mbps over 1 AU to a 4-meter optical ground station. The development of the DST will follow a similar approach as foreseen for the Asteroid Impact Mission (AIM), namely to increase the technology readiness level (TRL) of existing developments wherever possible, or reasonable. The DST will be located on a side panel of the S/C, and will constantly face the Earth. Residual attitude movements (pointing errors) of the S/C will be covered by the field-of view of the DST telescope (an aperture diameter of 200 mm is envisaged) and by a fine pointing assembly. ESA is also embarking on a study to develop a 4-meter class DOCS ground terminal (DGT). Furthermore, the Consultative Committee for Space Data Systems (CCSDS) is currently developing a standard (“Blue Book”) for “High Photon Efficiency Optical Communications”. DOCS will serve as one of two implementations of the standard, which are required for it to become applicable.","PeriodicalId":397803,"journal":{"name":"2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115263268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of polar codes for free space optical communication","authors":"Keita Ito, E. Okamoto, H. Takenaka, H. Kunimori, M. Toyoshima","doi":"10.1109/ICSOS.2017.8357232","DOIUrl":"https://doi.org/10.1109/ICSOS.2017.8357232","url":null,"abstract":"In recent years, satellite laser communication is attracting much attention as an important infrastructure, due to its larger transmission capacity compared to radio-wave satellite communications. However, in satellite-to-ground laser transmissions, scintillation occurs due to air turbulence, and the received optical power fluctuates, resulting in a burst error. Thus, strong error correction codes are required for high quality satellite transmissions. E. Arikan has proposed a new error correction code called the Polar code, which is proven to asymptotically achieve the channel capacity with a long code length N in any binary memoryless channel. In addition, the calculation complexity of Polar codes used in encoding and decoding is on the order of O(N log N), which is lower than that of currently used channel codes. However, to achieve high performance, we need to properly select a “frozen bit”, but the optimal selection in satellite laser channels is not known. Therefore, in this study, we investigate the selection methods of frozen bits for free space optics (FSO) by evaluating block error rate performances in FSO channels.","PeriodicalId":397803,"journal":{"name":"2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS)","volume":"573 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125309788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New FSO ATP methods for compact space subsystems","authors":"C. Chalfant, T. Tidwell, L. Borsodi, B. Bryars","doi":"10.1109/ICSOS.2017.8357222","DOIUrl":"https://doi.org/10.1109/ICSOS.2017.8357222","url":null,"abstract":"Our current and future Free Space Optical (FSO) designs and performance will be presented; Acquisition, Tracking, and Pointing (ATP) will be a key focus along with the size, weight and power (SWaP) of our existing ground systems and our design targets for space applications. Without gimbals, Rislet prisms, steering mirrors, or off-optical-z-axis sensing, and with only five static non-moving optical elements, we simply move an optical fiber in the focal plane to track the input and output beam angles over the entire wide range pointing field in both azimuth and elevation. Our optical design uses only five statically mounted elements. Fine pointing accuracies are sustained over the entire field without the use of coarse pointing and control systems. The impacts on SWaP are significant, and greatly simplify the packaging and ATP control systems. Our bi-directional ground-links have operated from 1 to 10 Gbps with link distances from 1 to 10 km. The primary ground systems that were delivered had ATP fields of 10o or 30o in both azimuth and elevation. For the 30o system, the pointing resolution is 470 nano-radian, while the 10o system provides 147 nano-radian pointing resolution. We also discuss the performance of our ground links and anticipated performance for various space applications.","PeriodicalId":397803,"journal":{"name":"2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121172634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}