Examinando por Autor "Arruego, I."

Mostrando 1 - 7 de 7

Restringido
A Sol–Gel based magneto-optical device for the NANOSAT space mission
(Springer Link, 2009-03-31) Zayat, M.; Pardo, R.; Rosa, G.; Del Real, R. P.; Díaz Michelena, M.; Arruego, I.; Guerrero, H.; Levy, D.
On December 2004, the Spanish Space Agency INTA (Instituto Nacional de Técnica Aeroespacial) launched the first nanosatellite called NANOSAT (Fig. 1) on board an European rocket Ariane 5, from the French Guyana. The satellite consists of a hexagonal device of <19 kg of weight with a diameter of about 50 cm, which describes a LEO orbit of 655 km of altitude. The main objective of the satellite is to probe the operation and performance of micro- and nanotechnologies in space environment. One of the scientific experiments implemented on board was the Sol–Gel based magnetic nanosensor.
Acceso Abierto
COTS-Based Wireless Magnetic Sensor for Small Satellites
(Institute of Electrical and Electronics Engineers, 2010-05-06) Díaz Michelena, M.; Arruego, I.; Oter, J. M.; Guerrero, H.
We report on the utilization of a commercial off-the-shelf (COTS) magnetic sensor for the mission NANOSAT-01 and the set of tests that have been developed to up-screen it. The magnetic sensor head is a Wheatstone bridge formed by four anisotropic magnetoresistances (AMR). AMR sensors are an adequate choice for medium- to high-sensitivity (~3 mV/V/G) and resolution (~ 3 ¿G) requirements, mostly due to their low weight and volume that are so interesting for the aerospace industry. The whole system installed in NANOSAT-01 is formed by two biaxial sensors with two redundant PCBs (printed circuit boards) of RAD-HARD proximity electronics, which conditions the AMR output signal, measure the temperature, and resets the AMR. This magnetic sensor belongs to the attitude control system (ACS) of the satellite.
Restringido
In-orbit measurement of SET and DD fffects on optical wireless links for intra-satellite data transmission
(Institute of Electrical and Electronics Engineers, 2011-11-01) Arruego, I.; Martínez, J.; Guerrero, H.; Instituto Nacional de Técnica Aeroespacial (INTA)
In-orbit measurements of two experimental optical-wireless data links on board a polar LEO (Low Earth Orbit) spacecraft are presented. The effects of single event transients on the bit error rate, as well as those of displacement damage on the optoelectronic components being used, were measured. The results are consistent with those obtained from proton irradiations carried out in ground facilities.
Restringido
Magnetic giant magnetoresistance commercial off the shelf for space applications
(AIP Publishing, 2008-02-13) Díaz Michelena, M.; Oelschlägel, W.; Arruego, I.; Del Real, R. P.; Mateos, J. A. D.; Merayo, J. M.
The increase of complexity and miniaturizing level of Aerospace platforms make use of commercial off the shelf (COTS) components constitute a plausible alternative to the use of military or rad-tolerant components. In this work, giant magnetoresistance commercial sensors are studied to be used as COTS, the next missions to be launched in the framework of the Spanish National Space Program: OPTOS and SEOSAT. This technology of magnetic sensors is interesting due to their high operating range up to 2mT and the high temperature dynamic range from −50 up to 150°C. However, in contrast, it presents high hysteresis and nonlinearity, temperature dependence, and poor repeatability. To improve the hysteretic, nonlinear and nonrepetitive behavior, a method consisting of a combination of reset and biasing has been designed and implemented for the ±75𝜇T linear region centered around 300–375𝜇T biasing field.
Restringido
NANOSAT-01: Three Years of Mission. Magnetic Scientific Results
(Igneta Connect, 2009-06-13) Díaz Michelena, M.; Cerdán, M. F.; Arruego, I.
Three years after the launch of NANOSAT-01, the first Spanish test-bed platform for microtechnology and nanoscience, we report on the analysis of the magnetic data received from the magnetic sensor of the ACS—Attitude Control Subsystem. This magnetometer is based on an AMR—Anisotropic MagnetoResistance COTS Commercial Off-The-Shelf transducer by Honeywell. The in-flight experience of this first analysis of a COTS magnetic sensor mapping and the comparison of the in-orbit data with the models of the Earth magnetic field in LEO—Low Earth Orbit let us affirm that the AMR technology is not only adequate for measuring the magnetic field in-orbit but also is a technology valid for a highly aggressive environment as is the case of a LEO.
Restringido
Optical wireless links for intra-satellite communications: reflection models and hardware optimization
(Aerospace Research Central, 2010-05-23) Tamayo, R.; Alonso, José; Jiménez, J. J.; Arruego, I.; Guerrero, H.; Instituto Nacional de Técnica Aeroespacial (INTA)
The present work is a study on the propagation channel (physical layer) for wireless infrared communications in intra-satellite environments. Substituting cables and connectors with optical links inside a spaceborn platform offers many advantages and represents some technical challenges. We show analytical calculations, simulations, and experimental results for reflection models for aerospace materials, as well as wavelength division multiple access techniques for channel multiplexing. Improvements in the selection and optimization of emitter-detector pairs are also presented.
Acceso Abierto
The MetNet vehicle: a lander to deploy environmental stations for local and global investigations of Mars
(European Geoscience Union (EGU), 2017-02-24) Harri, Ari-Matti; Pichkadze, K.; Zeleny, L.; Vázquez, L.; Schmidt, W.; Alexashkin, S.; Korablev, O.; Guerrero, H.; Heilimo, J.; Uspensky, M.; Finchenko, V.; Linkin, V.; Arruego, I.; Genzer, M.; Lipatov, A.; Polkko, J.; Paton, M.; Savijärvi, H.; Haukka, H.; Siili, T.; Khovanskov, V.; Ostesko, B.; Poroshin, A.; Díaz Michelena, M.; Siikonen, T.; Palin, M.; Vorontsov, V.; Polyakov, A.; Valero, F.; Kemppinen, O.; Leinonen, J.; Romero, P.; Finnish Meteorological Institute (Finland); Russian Space Research Institute; Instituto Nacional de Técnica Aeroespacial (INTA); Lavochkin Association (Russia); Harri, A. M. [0000-0001-8541-2802]; Schmidt, W. [0000-0002-8210-3868]; Korablev, O. [0000-0003-1115-0656]; Genzer, M. [0000-0002-3971-0152]; Haukka, H. [0000-0001-7653-5114]
nvestigations of global and related local phenomena on Mars such as atmospheric circulation patterns, boundary layer phenomena, water, dust and climatological cycles and investigations of the planetary interior would benefit from simultaneous, distributed in situ measurements. Practically, such an observation network would require low-mass landers, with a high packing density, so a large number of landers could be delivered to Mars with the minimum number of launchers. The Mars Network Lander (MetNet Lander; MNL), a small semi-hard lander/penetrator design with a payload mass fraction of approximately 17 %, has been developed, tested and prototyped. The MNL features an innovative Entry, Descent and Landing System (EDLS) that is based on inflatable structures. The EDLS is capable of decelerating the lander from interplanetary transfer trajectories down to a surface impact speed of 50–70 m s−1 with a deceleration of < 500 g for < 20 ms. The total mass of the prototype design is ≈ 24 kg, with ≈ 4 kg of mass available for the payload. The EDLS is designed to orient the penetrator for a vertical impact. As the payload bay will be embedded in the surface materials, the bay's temperature excursions will be much less than if it were fully exposed on the Martian surface, allowing a reduction in the amount of thermal insulation and savings on mass. The MNL is well suited for delivering meteorological and atmospheric instruments to the Martian surface. The payload concept also enables the use of other environmental instruments. The small size and low mass of a MNL makes it ideally suited for piggy-backing on larger spacecraft. MNLs are designed primarily for use as surface networks but could also be used as pathfinders for high-value landed missions.