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21 Results Found

  • Article
  • Open Access
2,080 Views
10 Pages

Calorimetric experiments in space of the current and of the next generation measure cosmic rays directly above TeV on satellites in low Earth orbit. A common issue of these detectors is the determination of the absolute energy scale for hadronic show...

  • Article
  • Open Access
10 Citations
3,413 Views
14 Pages

16 June 2021

In-situ measurements of the spectral information on the lunar surface are of significance to study the geological evolution of the Moon. China’s Chang’E-4 (CE-4) Yutu-2 rover has conducted several in-situ spectral explorations on the Moon. The visibl...

  • Article
  • Open Access
10 Citations
3,224 Views
20 Pages

Influence of Topography on the Site Selection of a Moon-Based Earth Observation Station

  • Guoqiang Chen,
  • Huadong Guo,
  • Yixing Ding,
  • Haolu Shang,
  • Mingyang Lv and
  • Ke Zhang

29 October 2021

The Moon provides a long-term, stable, and unique location for Earth observation. Several space agencies, such as NASA, ESA, and CNSA, have conducted lunar explorations. To build a Moon-based observation station, site selection is the first step. The...

  • Article
  • Open Access
1,900 Views
19 Pages

22 February 2025

The Narrow-Angle Cameras (NACs) onboard the Lunar Reconnaissance Orbiter Camera (LROC) capture lunar images that play a crucial role in current lunar exploration missions. Among these images, those of the Moon’s permanently shadowed regions (PS...

  • Article
  • Open Access
3 Citations
3,127 Views
17 Pages

An Innovative Synthetic Aperture Radar Design Method for Lunar Water Ice Exploration

  • Yanyan Zhang,
  • Fei Zhao,
  • Sheng Chang,
  • Mingliang Liu and
  • Robert Wang

30 April 2022

Owing to the Moon’s rough surface, there is a growing controversy over the conclusion that water ice exists in the lunar permanently shadowed regions (PSRs) with a high circular polarization ratio (CPR). To further detect water ice on the Moon,...

  • Article
  • Open Access
4 Citations
2,850 Views
14 Pages

Numerical Simulation of the Lunar Polar Environment: Implications for Rover Exploration Challenge

  • Hong Gan,
  • Chengxuan Zhao,
  • Guangfei Wei,
  • Xiongyao Li,
  • Guojun Xia,
  • Xiao Zhang and
  • Jingjing Shi

The lunar polar regions are key areas for future exploration due to the long-term continuous illumination and persistently shadowed regions that can cold trap abundant water and other volatiles. However, the complex terrain, dynamic lighting, and sol...

  • Technical Note
  • Open Access
5 Citations
1,992 Views
13 Pages

5 August 2023

Global Ionospheric Specification (GIS) is based on the Gauss–Markov Kalman filter to assimilate the slant total electron content (TEC) observed from ground-based GPS receivers and space-based radio occultation instrumentations in order to recon...

  • Article
  • Open Access
4 Citations
1,802 Views
19 Pages

High-Precision Disparity Estimation for Lunar Scene Using Optimized Census Transform and Superpixel Refinement

  • Zhen Liang,
  • Hongfeng Long,
  • Zijian Zhu,
  • Zifei Cao,
  • Jinhui Yi,
  • Yuebo Ma,
  • Enhai Liu and
  • Rujin Zhao

22 October 2024

High-precision lunar scene 3D data are essential for lunar exploration and the construction of scientific research stations. Currently, most existing data from orbital imagery offers resolutions up to 0.5–2 m, which is inadequate for tasks requ...

  • Article
  • Open Access
11 Citations
3,790 Views
25 Pages

Ionospheric Behavior during the 10 June 2021 Annular Solar Eclipse and Its Impact on GNSS Precise Point Positioning

  • Juan Carlos Valdés-Abreu,
  • Marcos A. Díaz,
  • Manuel Bravo,
  • Juan Carlos Báez and
  • Yohadne Stable-Sánchez

29 June 2022

The main effects of the 10 June 2021 annular solar eclipse on GNSS position estimation accuracy are presented. The analysis is based on TEC measurements made by 2337 GNSS stations around the world. TEC perturbations were obtained by comparing results...

  • Article
  • Open Access
1 Citations
2,262 Views
23 Pages

26 December 2024

The characterization of the lunar surface and subsurface through the utilization of synthetic aperture radar data has assumed a pivotal role in the domain of lunar exploration science. This investigation concentrated on the polarimetric analysis aime...

  • Article
  • Open Access
1,207 Views
25 Pages

From the Moon to Mercury: Release of Global Crater Catalogs Using Multimodal Deep Learning for Crater Detection and Morphometric Analysis

  • Riccardo La Grassa,
  • Cristina Re,
  • Elena Martellato,
  • Adriano Tullo,
  • Silvia Bertoli,
  • Gabriele Cremonese,
  • Natalia Amanda Vergara Sassarini,
  • Maddalena Faletti,
  • Valentina Galluzzi and
  • Lorenza Giacomini

25 September 2025

This study has compiled the first impact-crater dataset for Mercury with diameters greater than 400 m by a multimodal deep-learning pipeline. We present an enhanced deep learning framework for large-scale planetary crater detection, extending the YOL...

  • Article
  • Open Access
3 Citations
2,453 Views
23 Pages

Inferring the Variability of Dielectric Constant on the Moon from Mini-RF S-Band Observations

  • Shashwat Shukla,
  • Gerald Wesley Patterson,
  • Abhisek Maiti,
  • Shashi Kumar and
  • Nicholas Dutton

30 August 2024

The physical properties of lunar regolith are crucial for exploration planning, hazard assessment, and characterizing scientific targets at global and polar scales. The dielectric constant, a key property, offers insights into lunar material distribu...

  • Article
  • Open Access
1 Citations
2,522 Views
23 Pages

28 August 2021

Solar eclipses are astronomic phenomena in which the Earth’s moon transits between the planet and the Sun, projecting a shadow onto the planet’s surface. As solar power installed capacity increases, detailed studies of this region-wide phenomenon’s e...

  • Article
  • Open Access
19 Citations
8,093 Views
23 Pages

29 September 2022

The Permanently Shadowed Regions (PSRs) of the lunar south pole have never been directly sampled. To explore and discover lunar resources, the Chinese lunar south pole exploration mission is scheduled to land in direct sunlight near the PSR, where sa...

  • Review
  • Open Access
4,163 Views
10 Pages

13 February 2024

Solar and lunar eclipses are indeed the first astronomical phenomena which have been recorded since very early antiquity. Their periodicities gave birth to the first luni-solar calendars based on the Methonic cycle since the sixth century before Chri...

  • Communication
  • Open Access
2 Citations
2,167 Views
12 Pages

1 March 2023

The center path of the 21 June 2020 solar eclipse, which passed through Guam (13.62°N, 144.86°E, 94.6% obscuration), United States, at the end of its journey, provides a peculiar opportunity to study the ionospheric changes as the moon shadow...

  • Article
  • Open Access
11 Citations
9,139 Views
21 Pages

Sensor Stability for SST (3S): Toward Improved Long-Term Characterization of AVHRR Thermal Bands

  • Kai He,
  • Alexander Ignatov,
  • Yury Kihai,
  • Changyong Cao and
  • John Stroup

20 April 2016

Recently, the National Oceanic and Atmospheric Administration (NOAA) performed sea surface temperature (SST) reanalysis (RAN1) from seven AVHRR/3s onboard NOAA-15 to -19 and Metop-A and -B, from 2002–present. Operational L1b data were used as input....

  • Article
  • Open Access
1 Citations
5,964 Views
24 Pages

8 February 2021

Photography can be used for pleasure and art but can also be used in many disciplines of science, because it captures the details of the moment and can serve as a proving tool due to the information it preserves. During the period of the Apollo progr...

  • Article
  • Open Access
8 Citations
3,328 Views
24 Pages

30 October 2018

This work will provide a detailed characterization of the travelling ionospheric disturbances (TIDs) created by the solar eclipse of 21 August 2017, the shadow of which crossed the United States from the Pacific to the Atlantic ocean. The analysis is...

  • Article
  • Open Access
10 Citations
8,674 Views
25 Pages

Design and Characterization of the Multi-Band SWIR Receiver for the Lunar Flashlight CubeSat Mission

  • Quentin Vinckier,
  • Luke Hardy,
  • Megan Gibson,
  • Christopher Smith,
  • Philip Putman,
  • Paul O. Hayne and
  • R. Glenn Sellar

20 February 2019

Lunar Flashlight (LF) is an innovative National Aeronautics and Space Administration (NASA) CubeSat mission that is dedicated to quantifying and mapping the water ice harbored in the permanently shadowed craters of the lunar South Pole. The primary g...

  • Article
  • Open Access
6 Citations
12,394 Views
26 Pages

19 September 2011

Water ice has been discovered on the moon by radar backscatter at the North Pole and by spectrometry at the South Pole in the Cabeus crater with an extrapolated volume for both poles of conservatively 109 metric tons. Various exogenic and endogenic s...