Two‐Line Elements Based Thermospheric Mass Density Specification From Parameter Optimization of a Physics‐Based Model by Dexin Ren, Jiuhou Lei

“…Abstract Accurately estimating the mass density of the thermosphere can assist satellite operators in planning missions and optimizing satellite orbits, reducing the risk of collisions. …”
Get full text

New Space Companies Meet a “Normal” Solar Maximum by Noé Lugaz, Huixin Liu, Brett A. Carter, Jennifer Gannon, Shasha Zou, Steven K. Morley

“…However, the number of rocket launches, satellites in orbit and private space companies has increased dramatically in the past 20 years. …”
Get full text

Flexible-Robotic Reflector for Aerospace Applications by Nir Shvalb, Boaz Ben-Moshe, Oded Medina, Raz Itzhaki Tamir

“…In this paper we present a new concept for a dynamic antenna specially designed for communication satellites. The suggested flexible-robotic antenna is based on a dual-reflector structure, where the subreflector has a complex surface shaping robotic mechanism allowing it to fix most of the morphologic errors in the main reflector. …”
Get full text

Research on the Trajectory Model for ZY-3 by Yifu Chen, Zhong Xie

“…The new generation Chinese high-resolution three-line stereo-mapping satellite Ziyuan 3 (ZY-3) is equipped with three sensors (nadir, backward, and forward views). …”
Get full text

Features and prospects of the Russian civil aircraft industry development under sanctions pressure from Western countries by V. V. Lapushkin

“…The United States of America and its European satellites have imposed comprehensive sanctions against Russian air carriers, including a ban on aircraft deliveries. …”
Get full text

Constraints of Anisotropy on Warm Power-Law Ination in Light of Planck Results by Zahra Ghadiry, Ali Aghamohammadi, Abdollah Refaei

“…Then we calculate the slow-roll parameters and observational indexes in both regimes and finally, we show that this model has been able to make a good agreement by comparing the theoretical results and observational data obtained from cosmic microwave background and Planck satellites 2013 and 2015…”
Get full text

The thermal evaluation of snow line and identification of potential areas of snow falling in the Alborz Mountains with NOAA-AVHRR images by Dariush Yarahmadi, Amanolah fathnia, Mehdi Sherafat

“…Since the satellites are able to imaging a surface at different times, this will allow snow survey studies to investigate the spatial and temporal distribution of snow. …”
Get full text

Performance Enhancement of Spaceborne Cooler Passive Launch and On-Orbit Vibration Isolation System by Yeon-Hyeok Park, Mun-Shin Jo, Eung-Shik Lee, Hyun-Ung Oh

“…A spaceborne cryogenic cooler induces undesirable microvibration disturbances during its on-orbit operation, which is one of the main sources that degrades the image quality of submeter-level high-resolution observation satellites. Several types of vibration isolation systems based on passive approaches have been developed for reducing the microvibration of the cooler. …”
Get full text

A Global Thermospheric Density Prediction Framework Based on a Deep Evidential Method by Yiran Wang, Xiaoli Bai

“…The framework is investigated on five test cases along various satellites from 2003 to 2015 involving geomagnetic storms with Disturbance Storm Time (Dst) values smaller than −50 nT. …”
Get full text

Ionospheric Gradient Threat Mitigation in Future Dual Frequency GBAS by Michael Felux, Mihaela-Simona Circiu, Jiyun Lee, Florian Holzapfel

“…With the introduction of Galileo and the latest generation of GPS satellites, a second frequency is available for aeronautical navigation. …”
Get full text

Research on Minimum Time Interception Problem with a Tangent Impulse under Relative Motion Models by Wenzhe Ding, Xinhong Li, Hong Yang

“…The minimum time interception problem with a tangent impulse whose direction is the same as the satellite’s velocity direction is studied based on the relative motion equations of elliptical orbits by the combination of analytical, numerical, and optimization methods. …”
Get full text

Disk-Integrated Lunar Brightness Temperatures between 89 and 190 GHz by Martin J. Burgdorf, Stefan A. Buehler, Imke Hans, Marc Prange

“…As the Moon has appeared thousands of times in the field of view of all microwave sounders combined, this investigation demonstrates the potential of weather satellites for fine tuning models and establishing the Moon as extremely accurate calibration reference.…”
Get full text

Spatial clustering of seasonal sea ice of Hudson Bay, Canada, 1971–2018 by Slawomir Kowal, William A. Gough, Kenneth Butler

“…For the period 1971 to 2018, a time series of sea-ice breakup and freeze-up dates and ice-free season length at thirty-six grid locations is generated from sea-ice charts derived from satellites and other data. These data are analyzed spatially using three different clustering techniques. …”
Get full text

Interhemispheric Asymmetry in the High‐Latitude Neutral Density Variations During the 13–14 March 2022 Storm by Qingyu Zhu, Gang Lu, Sarah Vines, Marc Hairston

“…This study presents a dynamic perspective on the IHA of storm‐time high‐latitude neutral density variations that is particularly helpful to the proper interpretation of satellite observations.…”
Get full text

Strong Relativistic Electron Flux Events in GPS Orbit by Nigel P. Meredith, Thomas E. Cayton, Michael D. Cayton, Richard B. Horne

“…Abstract Relativistic electrons cause internal charging on satellites and are a significant space weather hazard. …”
Get full text

A Wide-Beam Scanning Mode for Near-Space Passive SARs by Peng Zhou, Peng Ren, Yongshou Dai

“…We also synchronize the azimuth beam of the receiver with that of the satellite within seconds during the beam scanning to further increase the scene extension. …”
Get full text

Commissariats of Military Industry during the Great Patriotic War by Yu. V. Il’In

“…Largely due to this fact, the Soviet Union won in serious confrontation with the military-industrial complex military industry of Nazi Germany and its satellites. On the basis of archival documents and testimony of contemporaries the article shows the contribution of the defense industry in the Soviet Union's victory in the Great Patriotic War.…”
Get full text

Innovative Radiating Systems for Train Localization in Interference Conditions by C. Vegni, M. Tosti, A. M. Vegni

“…The design of innovative radiating systems based on the metamaterial technology for GNSS (Global Navigation Satellite System) applications in radio frequency (RF) interference conditions is proposed. …”
Get full text

A Convex Approach for Trajectory Optimization of Super-Synchronous-Transfer-Orbit Large Launch Systems with Time-Position Constraints by Yuan Li, Ruisheng Sun, Wei Chen, Nan Yang

“…The payload of SSTO launch systems is typically a geostationary equatorial orbit (GEO) satellite, and the time and position of orbital injection are constrained, which is quite different from the case of general satellites. …”
Get full text

An Interpretable Machine Learning Procedure Which Unravels Hidden Interplanetary Drivers of the Low Latitude Dayside Magnetopause by Sheng Li, Yang‐Yi Sun, Chieh‐Hung Chen

“…A magnetopause crossings database from the Time History of Events and Macroscale Interactions during Substorms satellites and the multiple interplanetary parameters from OMNI during the period of 2007–2016 are utilized. …”
Get full text