Proton Monitor Las Dos Torres: First Intercomparison of In-Orbit Results

Jiménez, Juan J.; Oter, Javier Martinez; Apéstigue, V.; Hernando, Carlos; Ibarmia, S.; Hajdas, W.; Sánchez-Páramo, J.; Álvarez, M.; Arruego, Ignacio; Guerrero, H.

doi:10.1109/tns.2012.2198241

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…These checkouts are conducted to assess the instrument's condition and monitor potential degradation of sensor elements during the mission, with the expectation that the most significant deterioration may occur during the Jupiter gravity assist maneuver. This assessment involves measuring the dark currents of various sensors as their values increase with displacement damage (performed in previous instruments Jimenez et al 2012;Arruego et al 2017;Apestigue et al 2022), measure the temperatures of the sensors during all the scientific operation due its relationship with dark current values, along with monitoring leakage currents from ASICs' operational amplifiers, which could subsequently affect absolute channel measurements. Utilizing this information helps mitigate radiation-induced effects on channel signals.…”

Section: Umr Operational Modesmentioning

confidence: 99%

The Uranus Multi-Experiment Radiometer for Haze and Clouds Characterization

Apéstigue,

Toledo,

Irwin

et al. 2024

Space Sci Rev

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The aerosols (clouds and hazes) on Uranus are one of the main elements for understanding the thermal structure and dynamics of its atmosphere. Aerosol particles absorb and scatter the solar radiation, directly affecting the energy balance that drives the atmospheric dynamics of the planet. In this sense, aerosol information such as the vertical distribution or optical properties is essential for characterizing the interactions between sunlight and aerosol particles at each altitude in the atmosphere and for understanding the energy balance of the planet’s atmosphere. Moreover, the distribution of aerosols in the atmosphere provides key information on the global circulation of the planet (e.g., regions of upwelling or subsidence).To address this challenge, we propose the Uranus Multi-experiment Radiometer (UMR), a lightweight instrument designed to characterize the aerosols in Uranus’ atmosphere as part of the upcoming Uranus Flagship mission’s descending probe payload. The scientific goals of UMR are: (1) to study the variation of the solar radiation in the ultra-violet (UV) with altitude and characterize the energy deposition in the atmosphere; (2) to study the vertical distribution of the hazes and clouds and characterize their scattering and optical properties; (3) to investigate the heating rates of the atmosphere by directly measuring the upward and downward fluxes; and (4) to study the cloud vertical distribution and composition at pressures where sunlight is practically negligible (p > 4-5 bars).The instrument includes a set of photodetectors, field-of-view masks, a light infrared lamp, and interference filters. It draws on the heritage of previous instruments developed at the Instituto Nacional de Técnica Aeroespacial (INTA) that participated in the exploration of Mars, where similar technology has demonstrated its endurance in extreme environments while utilizing limited resources regarding power consumption, mass and volume footprints, and data budget. The radiometer’s design and characteristics make it a valuable complementary payload for studying Uranus’ atmosphere with a high scientific return.

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Section: Umr Operational Modesmentioning

confidence: 99%

The Uranus Multi-Experiment Radiometer for Haze and Clouds Characterization

Apéstigue,

Toledo,

Irwin

et al. 2024

Space Sci Rev

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“…PE board (Figure 6(2)) definitely has more space; it has a 77 × 95 mm 2 area, enough to include all of the needed electronics to provide RDS-DP processing, storage, and communication capabilities. The analog signals from OH are distributed in a final multiplexor along with the rest of signals coming from PE: (i) internal voltage levels as housekeeping; (ii) post-amplified OH optical channels for cases with low-level signals (twilight); (iii) internal "displacement damage sensor" dark current and its temperature that offer an estimation of the radiation received by the internal electronics [25]. Finally, the analog chain passes through a low pass Sallen-Key second-order filter before arriving at the 16-bit ADC (Figure 7).…”

Section: Electronic Designmentioning

confidence: 99%

Radiation and Dust Sensor for Mars Environmental Dynamic Analyzer Onboard M2020 Rover

Apéstigue

Gonzalo

Jiménez-Martín

et al. 2022

Sensors

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The Radiation and Dust Sensor is one of six sensors of the Mars Environmental Dynamics Analyzer onboard the Perseverance rover from the Mars 2020 NASA mission. Its primary goal is to characterize the airbone dust in the Mars atmosphere, inferring its concentration, shape and optical properties. Thanks to its geometry, the sensor will be capable of studying dust-lifting processes with a high temporal resolution and high spatial coverage. Thanks to its multiwavelength design, it will characterize the solar spectrum from Mars’ surface. The present work describes the sensor design from the scientific and technical requirements, the qualification processes to demonstrate its endurance on Mars’ surface, the calibration activities to demonstrate its performance, and its validation campaign in a representative Mars analog. As a result of this process, we obtained a very compact sensor, fully digital, with a mass below 1 kg and exceptional power consumption and data budget features.

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“…A more advanced and experimented platform for technology demonstration. Onboard this platform the initial experimental payloads were a couple of magnetic sensors: the GMR and a magnetoimpedance vector, and an experiment for the measurement of the total radiation flux by means of the effect the radiation has in the dark current of optoelectronic devices: Las Dos Torres (The Two Towers) [14]. 3) A national satellite for Earth observation: SEOSAT.…”

Section: Introduction -A Flight Opportunitymentioning

confidence: 99%

Commercial Off-The-Shelf GMR Based Sensor on Board Optos Picosatellite

Michelena

2013

Giant Magnetoresistance (GMR) Sensors

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Abstract.Space is an environment of extreme parameters. Wide temperature swings, very low pressures (vacuum), moderate to high radiation, mechanical vibrations and impacts, etc. Thus, components for space applications, which need to stand these hard conditions, are normally very expensive and it often takes a while to include emerging technologies in the space market. This means that space components are not always that innovative.The case of vector magnetometers is not an exception. Since the beginning of the space exploration mainly fluxgate magnetometers have been used for magnetic mapping [1]. Fluxgates are robust sensors and massive core fluxgates present very good performances for geomagnetic mapping and further exploration in the solar system. Besides, they are normally combined with a scalar absolute sensor for calibration of the vector magnetometer.In an attempt to be able to get ready as fast as possible to use emerging magnetic sensing technologies for space applications, INTA has devoted some effort in the qualification for flight use, of Commercial Off-The-Shelf (COTS) solid state magnetic sensors, as AMR and GMR sensors [2][3][4].In this chapter we describe the chain of testing and adaptation of the available commercial GMR sensors for an experimental payload in a picosatellite (OPTOS, 3 kg). We present the calibration tests results and the expectations we have for the in-orbit measurements.

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Proton Monitor Las Dos Torres: First Intercomparison of In-Orbit Results

Cited by 6 publications

References 8 publications

The Uranus Multi-Experiment Radiometer for Haze and Clouds Characterization

The Uranus Multi-Experiment Radiometer for Haze and Clouds Characterization

Radiation and Dust Sensor for Mars Environmental Dynamic Analyzer Onboard M2020 Rover

Commercial Off-The-Shelf GMR Based Sensor on Board Optos Picosatellite

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