Results 31 to 40 of about 583,316 (279)

An Integrated Tracker for STAR [PDF]

AIP Conference Proceedings, 2006
The STAR experiment at the Relativistic Heavy Ion Collider RHIC studies the new state of matter produced in relativistic heavy ion collisions and the spin structure of the nucleon in collisions of polarized protons. In order to improve the capabilities for heavy flavor measurements and the reconstruction of charged vector bosons an upgrade of the ...
openaire   +2 more sources

GMM-Based Adaptive Extended Kalman Filter Design for Satellite Attitude Estimation under Thruster-Induced Disturbances

Sensors, 2023
Star images from star trackers are usually defocused to capture stars over an exposure time for better centroid measurements. While a satellite is maneuvering, the star point on the screen of the camera is affected by the satellite, which results in the ...
Taeho Kim, Natnael S. Zewge, Hyochoong Bang, Hyosang Yoon   +3 more
doaj   +1 more source

Characterization of Chromatic Effects in Small Star Trackers [PDF]

, 2016
This paper explores how star color affects the design, calibration, and operation of star trackers. We develop a series of tools that characterize the chromatic performance of a star tracker and suggest how this information can be used in the design (e.g.
Sinclair, Doug, Enright, John, Dzamba, Tom   +2 more
core   +1 more source

Universal Verification Platform and Star Simulator for Fast Star Tracker Design

Sensors, 2021
Developing star trackers quickly is non-trivial. Achieving reproducible results and comparing different algorithms are also open problems. In this sense, this work proposes the use of synthetic star images (a simulated sky), allied with the standardized ...
Victor Hugo Schulz, Gabriel Mariano Marcelino, Laio Oriel Seman, Jeferson Santos Barros, Sangkyun Kim, Mengu Cho, Gabriel Villarrubia González, Valderi Reis Quietinho Leithardt, Eduardo Augusto Bezerra   +8 more
doaj   +1 more source

Consideration on Actualizing the Non-Dimensional Star Pattern Recognition Algorithm for a Typical Laboratory Star Tracker [PDF]

فصلنامه علوم و فناوری فضایی, 2012
Star trackers are one of the most accurate attitude determination devices of a spacecraft. Star trackers are able to determine the spacecraft attitude with the use of recognizing the stars within their field of view.
Jafar Roshanian, Shabnam Yazdani, S. Mehdi Hasani, Masoud Ebrahimi Kachouie   +3 more
doaj  

Astronomy: Star tracker [PDF]

Nature, 2013
As an early adopter of astronomical technology, Andrea Ghez is revealing secrets about the giant black hole at the Galaxy's centre.
openaire   +1 more source

A Heavy Flavor Tracker for STAR [PDF]

, 2005
We propose to construct a Heavy Flavor Tracker (HFT) for theSTAR experiment at RHIC. The HFT will bring new physics capabilities toSTAR and it will significantly enhance the physics capabilities of theSTAR detector at central rapidities. The HFT will ensure that STAR willbe able to take heavy flavor data at all luminosities attainablethroughout the ...
Xu, Z., Chen, Y., Kleinfelder, S., Koohi, A., Li, S., Huang, H., Tai, A., Kushpil, V., Sumbera, M., Colledani, C., Dulinski, W., Himmi, A., Hu, C., Shabetai, A., Szelezniak, M., Valin, I., Winter, M., Surrow, B., Van Nieuwenhuizen, G., Bieser, F., Gareus, R., Greiner, L., Lu, Y., Lesser, F., Matis, H. S., Oldenburg, M., Ritter, H. G., Pierpoint, L., Retiere, F., Rose, A., Ruan, L., Schweda, K., Sichtermann, E., Thomas, J. H., Wieman, H., Yamamoto, E., Kotov, I., Xu, N., Zhang, Y.   +38 more
openaire   +6 more sources

ATTITUDE RESTITUTION FOR MULTISPECTRAL EARTH OBSERVATION SATELLITE USING SPACE TRIANGULATION TECHNIQUE [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Earth observation satellites are equipped with navigation components (star trackers, gyroscopes) which estimates the attitude of the satellite, corresponding to its orientation in the orbital reference frame.
N. Bernardini, R. Binet, B. Vidal
doaj   +1 more source

CCD star trackers [PDF]

, 1975
The application of CCDs to star trackers and star mappers is considered. Advantages and disadvantages of silicon CCD star trackers are compared with those of image dissector star trackers.
Goss, W. C.
core  

Uncovering Inequities: The Role of Social Determinants of Health in Hospitalized Adolescents and Young Adults With Heavy Menstrual Bleeding

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Heavy menstrual bleeding (HMB) is a common condition among adolescents and young adults (AYAs) and is the leading cause of iron deficiency anemia (IDA) in this population. Growing evidence suggests that social determinants of health (SDOH) influence menstrual bleeding patterns, access to care, and treatment. However, no studies have
Maria Carter‐Febres, Cristina Tarango, Ashley Childress, Chunyan Liu, Evan Thomas, Jennifer Pomales, Eric S. Mullins   +6 more
wiley   +1 more source