Results 71 to 80 of about 201,777 (208)

Orbit Determination via a Deeply- Coupled UKF/GNSS Filter [PDF]

open access: yesفصلنامه علوم و فناوری فضایی, 2016
This paper is dedicated to determining the orbit of a satellite by using Unscented Kalman Filter (UKF), in which, a GNSS is used as the observation sensor.
MohammadAli Amiri Atashgah   +2 more
doaj  

Non-linear orbit determination methods [PDF]

open access: yes
Nonlinear correction method for orbit determination using range, azimuth, and elevation ...
Nayfeh, A. H.
core   +2 more sources

Overview on Space-Based Optical Orbit Determination Method Employed for Space Situational Awareness: From Theory to Application

open access: yesPhotonics
Leveraging space-based optical platforms for space debris and defunct spacecraft detection presents several advantages, including a wide detection range, immunity to cloud cover, and the ability to maintain continuous surveillance on space targets.
Zhe Zhang   +6 more
doaj   +1 more source

Office of Spaceflight Standard Spaceborne Global Positioning System (GPS) user equipment project [PDF]

open access: yes
The Global Positioning System (GPS) provides the following: (1) position and velocity determination to support vehicle GN&C, precise orbit determination, and payload pointing; (2) time reference to support onboard timing systems and data time tagging; (3)
Saunders, Penny E.
core   +1 more source

Cosmic background explorer (COBE) navigation with TDRSS one-way return-link Doppler in the post-helium-venting phase [PDF]

open access: yes
A navigation experiment was performed which establishes Ultra-Stable Oscillator (USO) frequency stabilized one way return link Doppler TDRSS tracking data as a feasible option for mission orbit determination support at the Goddard Space Center Flight ...
Dunham, J.   +4 more
core   +1 more source

Autonomous navigation accuracy using simulated horizon sensor and sun sensor observations [PDF]

open access: yes, 1980
A relatively simple autonomous system which would use horizon crossing indicators, a sun sensor, a quartz oscillator, and a microprogrammed computer is discussed.
Hendrickson, H. T., Pease, G. E.
core   +1 more source

A demonstration of high precision GPS orbit determination for geodetic applications [PDF]

open access: yes
High precision orbit determination of Global Positioning System (GPS) satellites is a key requirement for GPS-based precise geodetic measurements and precise low-earth orbiter tracking, currently under study at JPL.
Border, J. S., Lichten, S. M.
core   +1 more source

First Use of Laser Ranging to Surface Retroreflectors for Orbit Determination: LRO-LOLA at the Moon

open access: yesThe Planetary Science Journal
We document the first operational demonstration of two-way spacecraft-to-surface laser ranging using Laser Retroreflector Arrays (LRAs) for orbit determination (OD) of the Lunar Reconnaissance Orbiter (LRO).
G. Cascioli   +13 more
doaj   +1 more source

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