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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Hyperbolic minimizing closed orbit and Herman's conjecture
双曲 最小化 闭合轨道 赫尔曼猜想
2023/5/6
We are motivated to study this problem so that the proof of Arnold Diffusion of many degrees of freedom can be significantly simplified.
Astronomers find a “cataclysmic” pair of stars with the shortest orbit yet（图）
“灾难性”恒星 恒星 双星系统
2023/6/9
Nearly half the stars in our galaxy are solitary like the sun. The other half comprises stars that circle other stars, in pairs and multiples, with orbits so tight that some stellar systems could fit ...
Astronomers discover a rare “black widow” binary, with the shortest orbit yet（图）
“黑寡妇”双星 恒星 伴星环 银河系
2023/6/9
The flashing of a nearby star has drawn MIT astronomers to a new and mysterious system 3,000 light years from Earth. The stellar oddity appears to be a new “black widow binary” — a rapidly spinning ne...
Driven by Earth's orbit, climate changes in Africa may have aided human migration（图）
Driven by Earth's orbit climate changes Africa may aided human migration
2020/2/20
In 1961, John Kutzbach, then a recent college graduate, was stationed in France as an aviation weather forecaster for the U.S. Air Force. There, he found himself exploring the storied caves of Dordogn...
AUTOMATIC REGISTRATION OF GF4 PMS: A HIGH RESOLUTION MULTI-SPECTRAL SENSOR ON BOARD A SATELLITE ON GEOSTATIONARY ORBIT
GF4 PMS Automatic Image Registration Optimal Base Band RPC Correction Spatial Resolution
2018/5/14
Geometric correction is an important preprocessing process in the application of GF4 PMS image. The method of geometric correction that is based on the manual selection of geometric control points is ...
STUDY ON HIGH RESOLUTION MEMBRANE-BASED DIFFRACTIVE OPTICAL IMAGING ON GEOSTATIONARY ORBIT
Diffractive Optics Deployable Achromatic Geostationary Orbit High Resolution Membrane
2017/7/12
Diffractive optical imaging technology provides a new way to realize high resolution earth observation on geostationary orbit. There are a lot of benefits to use the membrane-based diffractive optical...
APPLICATION OF VISION METROLOGY TO IN-ORBIT MEASUREMENT OF LARGE REFLECTOR ONBOARD COMMUNICATION SATELLITE FOR NEXT GENERATION MOBILE SATELLITE COMMUNICATION
Vision Metrology in Orbit Communication Satellite Large Deployable Antenna
2016/11/11
Satellite for next generation mobile satellite communication service with small personal terminal requires onboard antenna with very large aperture reflector larger than twenty meters diameter because...
GLOBAL BUNDLE ADJUSTMENT WITH VARIABLE ORIENTATION POINT DISTANCE FOR PRECISE MARS EXPRESS ORBIT RECONSTRUCTION
Planetary Mapping Mars HRSC Bundle Adjustment Orbit Modeling
2016/11/8
The photogrammetric bundle adjustment of line scanner image data requires a precise description of the time-dependent image orientation. For this task exterior orientation parameters of discrete point...
Symposium ES10—Frontiers in Oxide Interface Spintronics—Magnetoelectrics, Multiferroics and Spin-Orbit Effects
Electric field control of magnetism Materials integration
2016/7/25
Transition metal alloys and, more recently, heavy elemental (4d and 5d) metals have become the strategic elements of spintronic devices and applications. With the recent progress in fabrication and ch...
ON-ORBIT GEOMETRIC CALIBRATION APPROACH FOR HIGH-RESOLUTION GEOSTATIONARY OPTICAL SATELLITE GaoFen-4
GaoFen-4 high-resolution geostationary optical satellite on-orbit geometric calibration two-dimensional direction angle model geometric accuracy
2016/7/4
The GaoFen-4 (GF-4) remote sensing satellite is China’s first civilian high-resolution geostationary optical satellite, which has been launched at the end of December 2015. To guarantee the geometric ...
Mars Pathfinder: Cartographic analysis of the landing site from orbit
Mars Pathfinder Cartographic analysis landing site orbit
2016/5/20
Viking Orbiter stereo images were used to derive a geometrially precise orthoimage mosaic at 40m scale for the Mars Pathfinder landing site. Camera pointing for each images was obtained by a formal bu...
A study of on-orbit behaviour of InGaAs SWIR Channel Device of IRS-lC/lD LISS-III Camera
radiation signa
2016/5/20
The Indian Remote 穝ensing Satellite (IRS-I C), at an altitude of 817 Km, completed two years of operation in space
on December 25, 1997. The multi-spectral LISS-3 push-broom camera in IRS -...
Planet Formation in Earth-like Orbit around a Young Star
Planet Formation Earth Young Star
2016/4/13
The disks of dust and gas that surround young stars are the formation sites of planets. New images from the Atacama Large Millimeter/submillimeter Array (ALMA) reveal never-before-seen detai...
Studies of Phobos' Orbit, Rotation, and Shape Using Spacecraft Image Data
Phobos Control Point Network Shape Orbit Model Astrometric Observations
2015/12/17
Images obtained by the High Resolution Stereo Camera (HRSC) and the Super Resolution Channel (SRC) on the European Mars Express (MEX) spacecraft have renewed the interest in Phobos, the larger of the ...
On-orbit Stellar Camera Calibration based on Space Resection with Multi-images
on-orbit calibration stellar camera space resection multi star images satellite attitude accuracy
2015/11/20
Due to the intense vibration and/or the change of space environmental factors such as temperature, pressure, etc., the stellar camera parameters might change during satellites launching or while orbit...