Year: 2024
Type: article
Abstract: Deep space exploration is one of the key development directions in aerospace field. With the significant increase of detection distance, the traditional space exploration methods may be ineffective by effects such as signal energy attenuation and channel delay. There is an urgent need for a miniaturized, quasi real time, high-precision space velocity measurement instrument to be mounted on deep space aircraft and providing autonomous navigation. Spatial heterodyne spectral velocimetry technology is a newly proposed high-precision velocimetry method in recent years, and relevant research units have also obtained excellent measurement results in applications. However, this technology originally used laser light sources for active detection, which differs from the passive detection based on stellar light sources required for deep space vehicles in terms of prerequisites. Therefore, this article focuses on the technical route and feasibility exploration of using spatial heterodyne spectral velocimetry technology for stellar absorption spectrum, and proposes a practical measurement scheme based on the technical principle of background light synchronous cancellation method. With measured the radial velocity difference caused by the sun's rotation at different positions on the solar image plane through outside validation experiments built in a simulated environment on the ground. The experimental results indicate that, under the current stability conditions of ground-based solar observation, we have achieved the same level measurement accuracy as large ground-based telescopes by using instruments and equipment much smaller size. It can be considered that the spatial heterodyne spectral velocity measurement scheme proposed in this article has achieved feasibility verification based on stellar spectral detection capability under the premise of instrument miniaturization and quasi real-time processing. The research content provides a preliminary verification for the development of spatial heterodyne spectral velocimetry technology in the aerospace field, and also provides reference for the realization of high-precision autonomous navigation capability in the future aerospace technology.
Source: Remote Sensing
DOI: 10.3390/rs17010068
Authors: Xiang Peng, Mu Gu, Sujun Li, Qifeng Ren, Rujin Zhao
Language: English
Subfield: Instrumentation
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,069
Awards: G5967122072, G7769262592
OpenAlex ID: W4405967257