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Papers by Pierluigi de Simone

Zenodo (CERN European Organization for Nuclear Research), Oct 23, 2015

The article addresses UTC dissemination through Galileo Open Service and describes the Galileo Op... more The article addresses UTC dissemination through Galileo Open Service and describes the Galileo Open Service Key Performance Indicators related to timing.

SpaceOps 2006 Conference, Jun 19, 2006

Primary mission objective of the COSMO-SkyMed system is the provision of an operational Earth Obs... more Primary mission objective of the COSMO-SkyMed system is the provision of an operational Earth Observation Endto-End Service able to fast answering to the user needs. End-To-End Service is based on a reliable, secure and flexible system capable of generating and distributing that service in terms of basic products and value added products. COSMO-SkyMed is a complex System, composed by a Space Segment, a distributed Ground Segment and an Integrated Logistic Support & Operations (ILSO presenting the topdown approach, the development process and the advantages in terms of cost optimization and end-to end performance achievement.

The EOS will provide ranging capabilities and will enable receiver manufacturers to begin to desi... more The EOS will provide ranging capabilities and will enable receiver manufacturers to begin to design and test their technological solutions for Galileo receivers and Galileo overlay services, such as search and rescue. Specifically, the MBSE approaches enable the designer to effectively trace the requirements and design alternatives on the descending branch of the 'V.' For the same characteristics, MBSE facilitates the verification through a model repository that interconnects not only the design products, but also the stakeholders involved in the entire process. In addition, MBSE approaches support the automatic generation of the documentation and of other artifacts, particularly software. Using a model-based approach, it becomes easier to establish links between interface elements and the functional blocks in the receiver schema. Moreover, these links can also be decorated with a number of properties that can be used to further describe the type of the relationship between the interface element and the functional block.

Aerotecnica Missili & Spazio, Jul 1, 2015

Navigation space missions are mainly timing missions. They use extremely accurate atomic clocks e... more Navigation space missions are mainly timing missions. They use extremely accurate atomic clocks embarked on their satellites and as part of their ground infrastructure. Clocks in motion with respect to each other and moving in different gravitational potentials are the perfect mix to experiment relativistic effects. Despite the appearances, these effects are not negligible. This paper describes how these effects are being tackled in the European GNSS Galileo.

INCOSE Italia Conference on Systems Engineering, 2014

Concurrent engineering facilities (CEFs) are successfully used in the aeropsace sector to design ... more Concurrent engineering facilities (CEFs) are successfully used in the aeropsace sector to design systems and services that that fulfill the requirements. Model-based systems engineering (MBSE) enables the effective (i.e., unambiguous) communication in the collaborative activities within concurrent engineering and service systems engineering facilities. The advantages obtained by the MBSE approach can be further scaled up by an innovative approach that take into explicit account the representation of the inter-systems aspects, i.e., those aspects, namely interfaces, that stay in between the system, its subsystems and external entities (other systems and organizations). Such an approach, briefly denoted as a Model-based Interface Engineering (MBIE), brings several benefits to the CEF activities. This paper illustrates the integration of the Interface Communication Modelling Language (ICML) into the existing MBSE methods for the CEF software framework VirSat, by identifying the business needs driving the use of MBIE approaches and showing example application scenarios. concept/design that fulfills the system requirements, in a timeframe that ususally spans over two or three weeks. In such a context, the advantages obtained by the MBSE approach, in terms of enhanced communications, reduced development risks, improved quality, increased productivity and enhanced knowledge transfer, can be further scaled up by innovative approaches that take into explicit account the representation of the inter-systems aspects, i.e., those aspects, namely interfaces, that stay in between the

INCOSE International Symposium, 2012

ABSTRACT Conference code: 95709, Export Date: 27 November 2013, Source: Scopus, Art. No.: 6423066... more ABSTRACT Conference code: 95709, Export Date: 27 November 2013, Source: Scopus, Art. No.: 6423066, doi: 10.1109/NAVITEC.2012.6423066, Language of Original Document: English, Correspondence Address: Gianni, D.; European Space Agency, Noordwijk, Netherlands; email: Danielegianni@esa.int, References: Lisi, M., Galileo integrated approach to services provision (2012) Galileo Workshop, ION GNSS 2012, , Nashville, TN, US, Sept;

GPS Solutions, 2013

ABSTRACT The availability of multiple Global Navigation Satellite Systems (GNSS) will offer the o... more ABSTRACT The availability of multiple Global Navigation Satellite Systems (GNSS) will offer the opportunity to provide seamless navigation services and improved positioning performance. However, before this opportunity can be exploited, a number of issues need to be solved to ensure the compatibility and interoperability of existing GNSS. In particular, the GNSS interoperability can be technically defined as the capability of receivers to compute their global position using two or more GNSS signals. This capability can be more effectively achieved if Signal-In-Space interface specifications are available in a consistent, unambiguous, and possibly standard format, which can support engineers to design interoperable receivers. We aim to support the design of interoperable receivers with the introduction of the Interface Communication Modeling Language (ICML), a graphical language for the formal specification of Signal-In-Space interfaces. The ICML language enables receiver engineers to specify these interfaces at different levels of abstraction, such as analog signal or binary data. In addition, the ICML language also supports the specification of conversion routines between adjacent levels, for the representation of the dynamic aspects—e.g., convolution and encryption processes—of the interface specification. As such, the ICML language proposes an alternative format to textual-based interface specifications and can possibly integrate with the ongoing trend of the Model-based Systems Engineering approaches. We present the structure of the framework implementing the language and an example ICML-based specification for a simplified and reduced version of the Galileo Freely Accessible Navigation (F/NAV) message. The language metamodel is also attached for technical reference. An important caveat: no endorsement is made for the use of the ICML language for the official Galileo Signal-In-Space interface specification.

Zenodo (CERN European Organization for Nuclear Research), Oct 23, 2015

SpaceOps 2006 Conference, Jun 19, 2006

Aerotecnica Missili & Spazio, Jul 1, 2015

INCOSE Italia Conference on Systems Engineering, 2014

INCOSE International Symposium, 2012

GPS Solutions, 2013