Regenerative Ranging for JPL Software-Defined Radios

Angkasa, Krisjani; Border, James S.; Kinman, Peter; Duncan, Courtney; Kobayashi, M. Michael; Towfic, Zaid J.; Voss, Thaddaeus J.

doi:10.1109/maes.2019.2911002

Cited by 10 publications

(5 citation statements)

References 6 publications

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“…After obtaining the fractional phase of the received chips ˆ, r ε the STL routes the soft chips  Ψ( ) k to the component code correlators for acquisition; details of this process have been described by Angkasa et al (2019) and Hamkins et al (2016). Once Ψ( ) k has been acquired and locked, the value of the index q in Equation ( 62) is determined (i.e., the location q of the chip Ψ( ) k as an element of the sequence <…”

Section: Forming the Range Measurementmentioning

confidence: 99%

“…It has proven its utility for deep space missions, notably in the 2018 NASA MarCO mission, which flew a pair of CubeSats by Mars and provided real-time communications during NASA's InSight landing using the Iris transponders (Klesh et al, 2018). Since then, the Iris radio has had numerous improvements, including the addition of regenerative ranging (Angkasa et al, 2019), which is primarily used to improve the performance of two-way pseudonoise (PN) ranging. These improvements have also made possible the addition of one-way range measurable on the uplink with only modest modifications to the Iris firmware.…”

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confidence: 99%

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Formulation and Characterization of One-Way Radiometric Tracking with the Iris Radio Using a Chip-Scale Atomic Clock

Ely,

Towfic,,

Sorensen

2024

navi

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The Iris radio is a National Aeronautics and Space Administration (NASA) Deep Space Network (DSN)-compatible software-defined radio designed by the Jet Propulsion Laboratory (JPL) and built by the Space Dynamics Laboratory (SDL). Because of Iris's small size and mass (0.5 L and 1.1 kg), it is ideal for small satellite or even CubeSat applications (Kobayashi et al., 2019). It has proven its utility for deep space missions, notably in the 2018 NASA MarCO mission, which flew a pair of CubeSats by Mars and provided real-time communications during NASA's InSight landing using the Iris transponders (Klesh et al., 2018). Since then, the Iris radio has had numerous improvements, including the addition of regenerative ranging (Angkasa et al., 2019), which is primarily used to improve the performance of two-way pseudonoise (PN) ranging. These improvements have also made possible the addition of one-way range measurable on the uplink with only modest modifications to the Iris firmware. Recently, NASA's CAPSTONE mission, launched on June 28, 2022 and currently near the Moon in a near-rectilinear halo orbit (NRHO), will perform navigation tests, including the use of one-way range and range rate for navigation (Thompson et al., 2022). In support of this, the Iris

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Section: Forming the Range Measurementmentioning

confidence: 99%

mentioning

confidence: 99%

Formulation and Characterization of One-Way Radiometric Tracking with the Iris Radio Using a Chip-Scale Atomic Clock

Ely,

Towfic,,

Sorensen

2024

navi

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“…Analysis in [33] identified JPL's 0.5U X-band Iris radio as a suitable deep-space communications radio for 3U and larger missions [69,70]. Iris radio is also expected to support twoway Doppler tracking with performance similar to that of regular-size missions [71]: 1 m (1σ) in range and 0.1 mm/s (1σ) in range rate [72]. These values are also assumed in the analysis of a semi-autonomous mission in Section 5.3, with only one radiometric observation per month (range and range rate).…”

Section: Error In Radiometric Observationsmentioning

confidence: 99%

“…To illustrate the effect of minimal ground-based navigation support, Monte Carlo simulations (1000 runs) are performed considering that one two-way Doppler measurement (range and range rate) is available per month (Table 8): all other system specifications are kept the same as in the baseline mission scenario (Table 2). JPL's 0.5U Iris radio [69,70] could be allocated even on 3U/6U CubeSat platforms [33], and is reported to have two-way Doppler capability of similar performance to that of traditional space missions [71]: ±1 m (1σ) and ±0.1 mm/s (1σ). Such performance is assumed in the Monte Carlo simulations, and the two-TCM guidance strategy introduced in Section 4.2.1 is employed.…”

Section: Effect Of Minimal Ground Station Supportmentioning

confidence: 99%

CubeSat Autonomous Navigation and Guidance for Low-Cost Asteroid Flyby Missions

Machuca

Sánchez

2021

Journal of Spacecraft and Rockets

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Recent advancements in CubeSat technology unfold new mission ideas and the opportunity to lower the cost of space exploration. Ground operations costs for interplanetary CubeSats, however, still represent a challenge towards low-cost CubeSat missions: hence, certain levels of autonomy are desirable. The feasibility of autonomous asteroid flyby missions using CubeSats is assessed here, and an effective strategy for autonomous operations is proposed. The navigation strategy is composed of observations of the Sun, visible planets, and the target asteroid, whereas the guidance strategy is composed of two optimally-timed trajectory correction maneuvers. A Monte Carlo analysis is performed to understand the flyby accuracies that can be achieved by autonomous CubeSats, in consideration of errors and uncertainties in: (a) departure conditions, (b) propulsive maneuvers, (c) observations, and (d) asteroid ephemerides. Flyby accuracies better than ±100 km (3σ) are found possible, and main limiting factors to autonomous missions are identified, namely: (a) on-board asteroid visibility time (Vlim≥11), (b) ΔV for correction maneuvers (>15 m/s), (c) asteroid ephemeris uncertainty (<1000 km), and (d) short duration of transfer to asteroid. Ultimately, this study assesses the readiness level of current CubeSat technology to autonomously flyby near-Earth asteroids, in consideration of realistic system specifications, errors and uncertainties.

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“…Several works have proposed some practical solutions for the regenerative payload implementation. In [17], the authors suggested the use of recent advances in microwave integrated circuits (MIC), while in [18], the potential use of software-defined radio (SDR) to facilitate the implementation of regenerative payloads onboard was proposed. Moreover, several industrial prototypes as presented in [19], [20] proposed practical implementations of regenerative payloads onboard.…”

Section: Introductionmentioning

confidence: 99%

A PHY Layer Security Analysis of a Hybrid High Throughput Satellite With an Optical Feeder Link

Illi

Bouanani

Ayoub³

et al. 2020

IEEE Open J. Commun. Soc.

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Hybrid terrestrial-satellite (HTS) communication systems have gained a tremendous amount of interest recently due to the high demand for global high data rates. Conventional satellite communications operate in the conventional Ku (12 GHz) and Ka (26.5-40 GHz) radio-frequency bands for assessing the feeder link, between the ground gateway and the satellite. Nevertheless, with the aim to provide hundreds of Mbps of throughput per each user, free-space optical (FSO) feeder links have been proposed to fulfill these high data rates requirements. In this paper, we investigate the physical layer security performance for a hybrid very high throughput satellite communication system with an FSO feeder link. In particular, the satellite receives the incoming optical wave from an appropriate optical ground station, carrying the data symbols of N users through various optical apertures and combines them using the selection combining technique. Henceforth, the decoded and regenerated information signals of the N users are zero-forcing (ZF) precoded in order to cancel the interbeam interference at the end-users. The communication is performed under the presence of malicious eavesdroppers nodes at both hops. Statistical properties of the signal-to-noise ratio of the legitimate and wiretap links at each hop are derived, based on which the intercept probability metric is evaluated. The derived results show that above a certain number of optical apertures, the secrecy level is not improved further. Also, the system's secrecy is improved using ZF precoding compared to the no-precoding scenario for some specific nodes' positions. All the derived analytical expressions are validated through Monte Carlo simulations. INDEX TERMS Free-space optics, high-throughput communications, hybrid terrestrial-satellite systems, intercept probability, optical feeder links, physical layer security, zero-forcing precoding.

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Regenerative Ranging for JPL Software-Defined Radios

Cited by 10 publications

References 6 publications

Formulation and Characterization of One-Way Radiometric Tracking with the Iris Radio Using a Chip-Scale Atomic Clock

Formulation and Characterization of One-Way Radiometric Tracking with the Iris Radio Using a Chip-Scale Atomic Clock

CubeSat Autonomous Navigation and Guidance for Low-Cost Asteroid Flyby Missions

A PHY Layer Security Analysis of a Hybrid High Throughput Satellite With an Optical Feeder Link

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