Preprint Article Version 1 This version is not peer-reviewed

The Scientific Information Model of Chang’e-4 Visible and Near-IR Imaging Spectrometer(VNIS) and In-Orbit Verification

Version 1 : Received: 25 May 2019 / Approved: 27 May 2019 / Online: 27 May 2019 (12:01:44 CEST)

A peer-reviewed article of this Preprint also exists.

Li, C.; Wang, Z.; Xu, R.; Lv, G.; Yuan, L.; He, Z.; Wang, J. The Scientific Information Model of Chang’e-4 Visible and Near-IR Imaging Spectrometer (VNIS) and In-Flight Verification. Sensors 2019, 19, 2806. Li, C.; Wang, Z.; Xu, R.; Lv, G.; Yuan, L.; He, Z.; Wang, J. The Scientific Information Model of Chang’e-4 Visible and Near-IR Imaging Spectrometer (VNIS) and In-Flight Verification. Sensors 2019, 19, 2806.

Journal reference: Sensors 2019, 19, 2806
DOI: 10.3390/s19122806

Abstract

The Chang’e-4 (CE-4) lunar rover, equipped with The Visible and Near-IR Imaging Spectrometer(VNIS) which based on acousto-optic tunable filter spectroscopy, was launched to the far side of the moon on December 8, 2018. The detection band of VNIS ranges from 0.45 to 2.4μm. Because of the weak reflection of infrared radiation from the lunar surface, a static electronic phase-locked acquisition method is adopted in the infrared channel for signal amplification. In this paper, full-link simulations and modeling are conducted of the infrared channel information flow of the instrument. The signal/noise characteristics of VNIS are analyzed in depth, and the signal-to-noise(SNR) ratio prediction and laboratory verification are presented. On January 4, 2019, the VNIS started working successfully and acquired high-resolution spectrum data of the far side of the moon for the first time. Through analysis, the SNR ratio is in line with predictions, and the data obtained by VNIS in orbit are consistent with the information model proposed in this paper.

Subject Areas

the Chang’e-4 lunar rover; phase-locked; signal-to-noise ratio; spectral resolution; infrared focal plane components

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.