Results 11 to 20 of about 552 (106)

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

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   +1 more source

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

Enhanced Real-Time Onboard Orbit Determination of LEO Satellites Using GPS Navigation Solutions with Signal Transit Time Correction

Aerospace
Enhanced real-time onboard orbit determination for low-Earth-orbit satellites is essential for autonomous spacecraft operations. However, the accuracy of such systems is often limited by signal propagation delays between GPS satellites and the user ...
Daero Lee, Soon Sik Hwang
doaj   +1 more source

Performances Study of Interferometric Radar Altimeters: from the Instrument to the Global Mission Definition

Sensors, 2006
The main limitations of standard nadir-looking radar altimeters have been knownfor long. They include the lack of coverage (intertrack distance of typically 150 km for theT/P / Jason tandem), and the spatial resolution (typically 2 km for T/P and Jason),
Anny Cazenave, Laurent Phalippou, Ernesto Rodriguez, Jean-Claude Souyris, Patrick Vincent, Vivien Enjolras   +5 more
doaj   +1 more source

Parameterization of Fuel-Optimal Synchronous Approach Trajectories to Tumbling Targets

Frontiers in Robotics and AI, 2018
Docking with potentially tumbling Targets is a common element of many mission architectures, including on-orbit servicing and active debris removal. This paper studies synchronized docking trajectories as a way to ensure the Chaser satellite remains on ...
David Charles Sternberg, David Miller
doaj   +1 more source

Analytical Modeling of LEO Satellite Mutual Visibility under Perturbations

Communications in Science and Technology
This present study develops an analytical model for mutual visibility in perturbed Low Earth Orbit (LEO), explicitly accounting for Earth’s oblateness (J2 and J3) and atmospheric drag.
Mohamed R Amin
doaj   +1 more source