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Using the Deep Space Atomic Clock for Navigation and Science.

Todd A Ely, Eric A Burt, John D Prestage

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|June 2, 2018

Summary

This summary is machine-generated.

The Deep Space Atomic Clock (DSAC) offers superior time stability for spacecraft. This advancement will enable precise one-way radiometric tracking for deep space navigation and radio science missions.

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Area of Science:

Atomic, Molecular, and Optical Physics
Astrodynamics and Space Navigation
Metrology and Timekeeping

Background:

Current deep space navigation relies on two-way radiometric tracking, limited by oscillator instability.
State-of-the-art ultrastable oscillators introduce drift and instability errors beyond 100 seconds.
Enabling one-way radiometric tracking is crucial for future deep space exploration and science.

Purpose of the Study:

To introduce the Deep Space Atomic Clock (DSAC) as a solution for enhanced spacecraft timekeeping.
To demonstrate the feasibility of a space-qualified mercury-ion atomic clock for deep space applications.
To enable precise one-way radiometric tracking for deep space navigation and radio science.

Main Methods:

Development of an advanced prototype mercury-ion atomic clock for spaceflight.
Testing and validation of the DSAC space demonstration unit's performance.
Characterization of frequency and time stability using Allan deviation.

Main Results:

The DSAC prototype has achieved remarkable frequency and time stability.
Ground-based tests show an Allan deviation of at one day for the DSAC unit.
Projected space performance indicates a significant reduction in navigation errors.

Conclusions:

The Deep Space Atomic Clock (DSAC) is a critical technology for advancing deep space navigation.
Achieved stability will enable routine use of one-way radiometric tracking.
DSAC technology paves the way for more efficient and precise deep space missions.