Results 11 to 20 of about 939,430 (229)

Cross-Referential Orbit Propagation for Autonomous Optical Link Acquisition in Large-Scale Satellite Constellations

Aerospace
High-precision onboard orbit propagation, often unavailable due to high demands of onboard resources, is crucial for autonomous optical link pointing and acquisition in large-scale low Earth orbit satellite constellations.
Yifu Cao, Zengshan Yin, Shihang Wang, Ruohao Zhang, Kai Ye, Chongbin Guo   +5 more
doaj   +2 more sources

Extension of the sun-synchronous Orbit [PDF]

, 2010
Through careful consideration of the orbit perturbation force due to the oblate nature of the primary body a secular variation of the ascending node angle of a near-polar orbit can be induced without expulsion of propellant.
Bosquillon de Frescheville, Francois, Vasile, M., Robert McKay, de Frescheville, F.B., François Bosquillon de Frescheville, McKay, R., Malcolm Macdonald, Macdonald, M., McKay, R.J., Massimiliano Vasile   +9 more
core   +4 more sources

Onboard software of Plasma Wave Experiment aboard Arase: instrument management and signal processing of Waveform Capture/Onboard Frequency Analyzer

Earth, Planets and Space, 2018
We developed the onboard processing software for the Plasma Wave Experiment (PWE) onboard the Exploration of energization and Radiation in Geospace, Arase satellite.
Shoya Matsuda, Yoshiya Kasahara, Hirotsugu Kojima, Yasumasa Kasaba, Satoshi Yagitani, Mitsunori Ozaki, Tomohiko Imachi, Keigo Ishisaka, Atsushi Kumamoto, Fuminori Tsuchiya, Mamoru Ota, Satoshi Kurita, Yoshizumi Miyoshi, Mitsuru Hikishima, Ayako Matsuoka, Iku Shinohara   +15 more
doaj   +1 more source

Evaluation of Geometric and Atmospheric Doppler for GNSS-RO Payloads [PDF]

AUT Journal of Electrical Engineering, 2017
To reduce the sampling rate in global navigation satellite system (GNSS)-radio occultation receivers, it is essential to establish a suitable estimation of Doppler frequency from the received signal in the satellite onboard receiver.
L. Mohammadi, S. Amiri, G.R. Mohammadkhani   +2 more
doaj   +1 more source

The CALorimetric Electron Telescope (CALET) on the International Space Station: Results from the First Two Years of Operation [PDF]

EPJ Web of Conferences, 2019
The CALorimetric Electron Telescope (CALET) space experiment, which has been developed by Japan in collaboration with Italy and the United States, is a high-energy astroparticle physics mission on the International Space Station (ISS).
Asaoka Y, Adriani O, Akaike Y, Asano K, Bagliesi MG, Berti E, Bigongiari G, Binns WR, Bonechi S, Bongi M, Bruno A, Brogi P, Buckley J H, Cannady N, Castellini G, Checchia C, Cherry M L, Collazuol G, Di Felice V, Ebisawa K, Fuke H, Guzik T G, Hams T, Hasebe N, Hibinov K, Ichimura M, Ioka K, Ishizaki W, Israel M H, Kasahara K, Kataoka J, Kataoka R, Katayose Y, Kato C, Kawanaka N, Kawakubo Y, Kohri K, Krawczynski H S, Krizmanic J F, Lomtadze T, Maestro P, Marrocchesi P S, Messineo A M, Mitchell J W, Miyake S, Moiseev A A, Mori K, Mori M, Mori N, Motz H M, Munakata K, Murakami H, Nakahira S, Nishimura J, De Nolfo G A, Okuno S, Ormes J F, Ozawa S, Pacini L, Palma F, Pal'shin V, Papini P, Penacchioni A V, Rauch B F, Ricciarini S B, Sakai K, Sakamoto T, Sasaki M, Shimizu Y, Shiomi A, Sparvoli R, Spillantini P, Stolzi F, Sugita S, Suh J E, Sulaj A, Takahashi I, Takayanagi M, Takita M, Tamura T, Tateyama N, Terasawa T, Tomida H, Torii S, Tsunesada Y, Uchihori Y, Ueno S, Vannuccini E, Wefel J P, Yamaoka K, Yanagita S, Yoshida A, Yoshida K   +92 more
doaj   +1 more source

Possibilities of Estimating F2 Layer Peak Plasma Frequency Using HF Radiation from High Apogee Satellites over Arctic Region

Remote Sensing, 2021
Based on the results of mathematical modeling, we consider the possibility to estimate the plasma frequency F2 layer maximum of the polar ionosphere (critical frequency, foF2) using frequency-sweeping radiation from a highly elliptical spacecraft orbit ...
Igor Krasheninnikov, Givi Givishvili
doaj   +1 more source

Enhancing onboard orbit propagation : a deep dive into FPGA capabilities [PDF]

, 2023
LAUREA MAGISTRALELe missioni nello spazio profondo si basano principalmente su stazioni terrestri e coinvolgimento umano per determinare la posizione del veicolo spaziale tramite il tracciamento radiometrico e pianificare l'esecuzione delle manovre per ...
GIACOMINI, DAVIDE
core  

Bulk plasma properties at geosynchronous orbit. [PDF]

, 2005
We present a comprehensive study of plasma properties at geosynchronous orbit for electron and ion energies between ∼1 eV and ∼45 keV, between 1990 and 2001.
Liemohn, M. W., Zhang, J. C., Denton, Michael H., Korth, H., Thomsen, M. F., Lynch, S.   +5 more
core   +5 more sources

CUSTARD (Cranfield University Space Technology Advanced Research Demonstrator) - A Micro-System Technology Demonstrator Nanosatellite. Summary of the Group Design Project MSc in Astronautics and Space Engineering. 1999-2000, Cranfield University [PDF]

, 2003
CUSTARD (Cranfield University Space Technology And Research Demonstrator) was the group design project for students of the MSc in Astronautics and Space Engineering for the Academic Year 1999/2000 at Cranfield University. The project involved the initial
Turner, Ray, Hobbs, Stephen
core   +6 more sources

Positionless Attitude Estimation With Integrated Star and Horizon Sensors

IEEE Access
With an increasing demand for nanosatellites to perform accurate pointing, such as on Earth observation missions, the availability and accuracy of the orbital position and velocity information on board the satellite’s computer become indispensable,
Fernando de Almeida Martins, Valdemir Carrara, Roberto D'Amore   +2 more
doaj   +1 more source