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

Sensors ◽  
2019 ◽  
Vol 19 (12) ◽  
pp. 2806 ◽  
Author(s):  
Chunlai Li ◽  
Zhendong Wang ◽  
Rui Xu ◽  
Gang Lv ◽  
Liyin Yuan ◽  
...  
Keyword(s):  
Signal To Noise Ratio ◽  
Scientific Information ◽  
Information Model ◽  
Tunable Filter ◽  
High Resolution Spectrum ◽  
The Moon ◽  
Imaging Spectrometer ◽  
Near Ir ◽  
Ir Imaging ◽  
Infrared Channel

The Chang’e-4 (CE-4) lunar rover, equipped with a visible and near-IR imaging spectrometer (VNIS) based on acousto-optic tunable filter spectroscopy, was launched to the far side of the moon on December 8, 2018. The detection band of the VNIS ranges from 0.45 to 2.4 μm. 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 on the infrared channel information flow of the instrument. The signal characteristics of the VNIS are analyzed in depth, and the signal to noise ratio (SNR) prediction and laboratory verification are presented. On 4 January 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 we have found that the SNR ratio is in line with our predictions, and the data obtained by VNIS in orbit are consistent with the information model proposed in this paper.

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

2019 ◽  
Author(s):  
Chunlai Li ◽  
Zhendong Wang ◽  
Rui Xu ◽  
Gang Lv ◽  
Liyin Yuan ◽  
...  
Keyword(s):  
Scientific Information ◽  
Information Model ◽  
Tunable Filter ◽  
High Resolution Spectrum ◽  
The Moon ◽  
Imaging Spectrometer ◽  
Near Ir ◽  
Noise Characteristics ◽  
Ir Imaging ◽  
Infrared Channel

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.

scholarly journals Near-IR Imaging Spectroscopy of CD Galaxy NGC1275

1996 ◽  
Vol 171 ◽  
pp. 440-440
Author(s):  
B. J. Sams ◽  
R. Genzel ◽  
A. Krabbe ◽  
N. Thatte ◽  
H. Kroker
Keyword(s):  
Imaging Spectroscopy ◽  
Max Planck ◽  
Imaging Spectrometer ◽  
Gas Density ◽  
The Core ◽  
Near Ir ◽  
Ir Imaging ◽  
K Band

H and K band imaging spectroscopy of the central 12″ (4.2 kpc) of NGC1275 using the Max-Planck-Institut für extraterrestrische Physik imaging spectrometer “3D” maps the gas density and temperature in the core and separates the contribution of Seyfert emission to the core light.

Near-IR imaging of atheromas in living arterial tissue

1993 ◽  
Vol 65 (9) ◽  
pp. 1247-1256 ◽  
Author(s):  
Lisa A. Cassis ◽  
Robert A. Lodder
Keyword(s):  
Near Ir ◽  
Ir Imaging ◽  
Arterial Tissue

Nadir and omnidirectional limb imaging spectrometer based on acousto-optic tunable filter

2019 ◽  
Vol 437 ◽  
pp. 81-89 ◽  
Author(s):  
Xiaoheng Wang ◽  
Xing Zhong ◽  
Ruifei Zhu ◽  
Fang Gao
Keyword(s):  
Tunable Filter ◽  
Imaging Spectrometer

Configurable Passband Imaging Spectrometer Based on Acousto-optic Tunable Filter

2008 ◽  
pp. 206-217 ◽  
Author(s):  
Joan Vila-Francés ◽  
Luis Gómez-Chova ◽  
Julia Amorós-López ◽  
Javier Calpe-Maravilla
Keyword(s):  
Tunable Filter ◽  
Imaging Spectrometer

Near-IR Imaging and Optical Spectroscopy of M 2-9

1997 ◽  
pp. 342-342
Author(s):  
A. Arrieta ◽  
S. Torres-Peimbert
Keyword(s):  
Optical Spectroscopy ◽  
Near Ir ◽  
Ir Imaging

scholarly journals Photometric Correction of Chang’E-1 Interference Imaging Spectrometer’s (IIM) Limited Observing Geometries Data with Hapke Model

2020 ◽  
Vol 12 (22) ◽  
pp. 3676
Author(s):  
Xuesen Xu ◽  
Jianjun Liu ◽  
Dawei Liu ◽  
Bin Liu ◽  
Rong Shu
Keyword(s):  
Wide Angle ◽  
The Moon ◽  
Imaging Spectrometer ◽  
Multispectral Data ◽  
Lunar Reconnaissance Orbiter ◽  
Sample Data ◽  
Small Phase ◽  
Wide Angle Camera ◽  
Best Fit ◽  
Data Result

The main objective of this study is to develop a Hapke photometric model that is suited for Chang’E-1 (CE-1) Interference Imaging Spectrometer (IIM) data. We first divided the moon into three areas including ‘maria’, ‘new highland’ and old ‘highland’ with similar photometry characteristic based on the Hapke parameters of the moon derived from Lunar Reconnaissance Orbiter Camera (LROC) Wide Angle Camera (WAC) multispectral data. Then, we selected the sample data in the ‘maria’ area and obtained a new set of Hapke model’s parameters that can best fit these data. Result shows that photometric correction using Hapke model with these new derived parameters can eliminate the effect of variations in viewing and luminating geometry, especially ‘opposition surge’, more efficiently than the empirical model. The corrected mosaic shows no significant artifacts along the tile boundaries and more detailed information of the image can be exhibited due to a better correction of ‘opposition surge’ at small phase angle (g < 15°).

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