نتایج جستجو برای: nanosatellite

تعداد نتایج: 230  

Journal: :Remote Sensing 2022

This paper focuses on the design of a new optical cone and pendulum scanning imaging mode for micro-nanosatellites. kind satellite uses high-resolution camera with small plane to achieve ultra-wide coverage through three-dimensional motion camera’s wobble, spin, orbital motion. First, this designs single-camera constant speed OCPSI (optical imaging) mode. On premise ensuring coverage, parameter...

Journal: : 2021

The paper presents the results of a calculation aimed to study influence ionizing, bremsstrahlung radiation on operation nanosatellite obtained during implementation project 0777-2020-0018 in 2020. A comparative analysis calculating specific ionization and energy losses protons (from 0.1 400 MeV) electrons 0.04 7 MeV), as well their path lengths aluminum according formulas various authors datab...

2001
Freddy M. Pranajaya Mark A. Cappelli

Preliminary results are presented, of measurements of thrust (T) and specific impulse (Isp), produced by a single emitter prototype colloid propulsion system. The development of the colloid thruster propulsion package at Stanford University is in preparation for flighttesting on a 20-kg university nanosatellite, to be launched in 2003. The half-kilogram Colloid Micro Thruster (CMT) package meas...

2013
Matthew Sorgenfrei

This paper presents a novel attitude determination and control solution for a three cube nanosatellite performing science operations in low Earth orbit. The spacecraft is tasked with studying the water content of Earth’s upper atmosphere by taking radiometer measurements along the 183 GHz absorption line. The radiometer must be calibrated against the cold of deep space, and this calibration nec...

2000
Subrata Das Dan Knights Curt Wu Walt Truszkowski

In this paper, we present a system for Distributed Intelligent Planning and Scheduling (DIPS) that helps a spacecraft function as an autonomous agent. A DIPS-based spacecraft receives only high-level goals from ground station operators, and performs its own planning and scheduling onboard, achieving these goals with onboard subsystems and in cooperation with other spacecraft. The task decentral...

1999
Christopher Kitts Freddy Pranajaya Julie Townsend Robert Twiggs

Distributed space systems are often cited as a means of enabling vast performance increases ranging from enhanced mission capabilities to radical reductions in operations cost. To explore this concept, Stanford University and Santa Clara University have initiated development of a simple, low cost, two-satellite mission known as Emerald. The Emerald mission has several on-orbit goals. First, it ...

2001
Subrata Das Curt Wu

In this paper, we present a system for Distributed Intelligent Planning and Scheduling (DIPS) that helps a spacecraft function as an autonomous agent. A DIPSbased spacecraft receives only high-level goals from ground station operators, and performs its own planning and scheduling onboard, achieving these goals with onboard subsystems and in cooperation with other spacecraft. The task decentrali...

2006
Yoaz Bar-Sever Jeff Srinivasan

I . ABSTRACT JPL is developing novel RF tracking sensors for both of NASA’s New Millennium Program constellation missions, ST-3LStarLight and ST-5. ST-3/StarLight9 the Separated Spacecraft Inlerferometer, is a two-satellite formation in heliocentric orbit designed to demonstrate various technologies required for space interferometry. Scheduled for a 2006 launch. ST-3 will fly JPL’s Autonomous F...

2018
S. Zhao G. Lioliou A. M. Barnett

A low-cost Commercial-Off-The-Shelf (COTS) 4H-SiC 0.06 mm2 UV p-n photodiode was coupled to a low-noise charge-sensitive preamplifier and used as photon counting X-ray spectrometer. The photodiode/spectrometer was investigated at X-ray energies from 4.95 keV to 21.17 keV: a Mo cathode X-ray tube was used to fluoresce eight high-purity metal foils to produce characteristic X-ray emission lines w...

2014
Kerri Cahoy Matthew Webber Ruslan Belikov Anne Marinan Eduardo Bendek

Coronagraphic space telescopes require wavefront control systems for high-contrast imaging applications such as exoplanet direct imaging. High-actuator-count MEMS deformable mirrors (DM) are a key element of these wavefront control systems yet have not been flown in space long enough to characterize their on-orbit performance. The MEMS Deformable Mirror CubeSat Testbed is a conceptual nanosatel...

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