Radio Science measurements in presence of data on optical and RF links

Asmar, S. W.; Moision, Bruce; Oudrhiri, Kamal

doi:10.1109/aero.2014.6836324

Cited by 4 publications

(4 citation statements)

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“…Hemmati () discusses optical communications at planetary distances and the technologies required to reach this future capability, most of which would be synergistically utilized for optical link science. Divsalar et al () discuss radio science measurements in presence of data on optical and Radio Frequency (RF) links.…”

Section: Future Outlookmentioning

confidence: 99%

Future of Planetary Atmospheric, Surface, and Interior Science Using Radio and Laser Links

et al. 2019

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Scientific studies using spacecraft radio links, which are shared with communications and navigation functions, have been carried out on almost every solar system exploration mission in the past five decades. They have led to numerous scientific discoveries as well as technological advances. These radio science experiments have investigated the interior structure of every planet in the solar system and several of their satellites, the Moon, and several comets and asteroids and sounded the atmospheres of every planet in the solar system except Mercury, and the atmospheres of Pluto and several large satellites, the Io Plasma Torus, Saturn's and Uranus' rings, and the solar corona. Future experiments at Mercury, the Jovian system, asteroid Psyche, and other targets are currently in various planning and development phases. Over the next 30 years, significant advances in radio and laser link science technologies, including one order of magnitude improvement achievable in range rate and range accuracy and advanced calibration techniques, could enable many additional scientific breakthroughs. Future exploration concepts focus on applications of small spacecraft and entry probes and can include constellations for studies of atmospheric dynamics, interior structures, and surface properties. Selected science-enabling technologies specific to small spacecraft instrumentation on future missions are under study. Examples include field tests of radio scattering to determine surface properties, constellations for high-resolution spatial and temporal atmospheric sounding, small science-quality software-defined transponders, miniature ultrastable oscillators, and advanced radiometric calibrations at the Deep Space Network.Plain Language Summary Radio links are used to communicate with spacecraft by sending them commands from ground controllers and receiving back science data. The same links are used to examine important properties of planetary atmospheres, surfaces, and interior structure by carefully studying small changes in the radio signal's frequency and other parameters caused by geophysical phenomena when the spacecraft are close to the planets. Improving the radio system on the spacecraft and ground stations can lead to additional scientific discoveries. There is a trend to use small spacecraft to explore the solar system in future, and research teams are preparing instrumentation systems that are compatible with such possible missions. Key Points:• Spacecraft telecommunications links are powerful tools to study planetary atmospheres, interiors, and surfaces as proven over five decades • Instrumentation design and calibration techniques have significantly improved, and concepts are developed for additional breakthroughs • There is a trend to miniaturize spacecraft and components and fly them in groups, sometimes in formation flying

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Section: Future Outlookmentioning

confidence: 99%

Future of Planetary Atmospheric, Surface, and Interior Science Using Radio and Laser Links

et al. 2019

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“…However in [5] the performance of such schemes has not been analyzed. In this paper in addition to the proposed optical receivers in [5] a new phase modulated optical signaling and the corresponding optical receiver has been proposed. In section 2 the received signal models are provided, in section 3 a background review on the CramerRao bound is provided.…”

Section: Introductionmentioning

confidence: 96%

“…Results were parametrically represented so that it can represent all the different cases of interest to RS observations. In [5] various optical receivers to extract phase information from the received optical signal were proposed. However in [5] the performance of such schemes has not been analyzed.…”

Section: Introductionmentioning

confidence: 99%

“…In [5] various optical receivers to extract phase information from the received optical signal were proposed. However in [5] the performance of such schemes has not been analyzed. In this paper in addition to the proposed optical receivers in [5] a new phase modulated optical signaling and the corresponding optical receiver has been proposed.…”

Section: Introductionmentioning

confidence: 99%

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Radio Science measurements using phase modulated optical links

Vilnrotter

Asmar

Cheung

2015

2015 IEEE Aerospace Conference

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Radio Science experiments currently rely on unmodulated continuous wave RF signal carrier for spectral purity and maximized signal-to-noise ratio. This requires missions to carefully schedule them away from periods of high rate telemetry. In the era of optical communications, currently designed systems experience the same problem. In this paper, a data processing architecture is derived that will yield high-accuracy link science type of information on the ground from readily transmitted communication signals coming from space assets, through optical links. This technique is intended to save power, bandwidth and scheduling demands on the spacecraft. Our proposed technical approach is applicable to a phase modulated laser thus providing an architectural improvement to present state-of-theart optical communication systems utilized by NASA as well as to future systems. The approach is to, first, obtain the achievable performance of Radio Science measurements from the received optical telemetry signals. This extends our previous results presented on Radio Science measurements for suppressed carrier RF signals. Secondly, a practical system is proposed that approaches the ultimate theoretical performance for estimating the amplitude, phase, and frequency variations due to the changes in the planet atmosphere. For optical links, our previous results to phase modulated CW laser communications are extended. The same information required for radio science data can be extracted by using either differential methods of encoding or phase modulated orthogonal signals and at the optical receiver a non-coherent local laser and an array of photon detectors are used. The performance of these phase modulated schemes is analyzed.

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2022

Radio Science Techniques for Deep Space Exploration

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Radio Science measurements in presence of data on optical and RF links

Cited by 4 publications

References 3 publications

Future of Planetary Atmospheric, Surface, and Interior Science Using Radio and Laser Links

Future of Planetary Atmospheric, Surface, and Interior Science Using Radio and Laser Links

Radio Science measurements using phase modulated optical links

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