High Fidelity Collision Probabilities Estimated Using Brute Force Monte Carlo Simulations [PDF]
The NASA Conjunction Assessment Risk Analysis team has implemented new software to estimate the probability of collision (P (sub c)) for Earth-orbiting satellites.
Baars, Luis G. +4 more
core +1 more source
The Automated Astronomic Positioning System (AAPS) [PDF]
Two prototype systems of The Automated Astronomic Positioning System (AAPS) have been delivered to Defense Mapping Agency (DMA). The AAPS was developed to automate and expedite the determination of astronomic positions (latitude and longitude).
Williams, O. N.
core +1 more source
The Norwegian Mapping Authority (NMA) has during the last few years had a close cooperation with Norwegian Defence Research Establishment (FFI) in the analysis of space geodetic data using the GEOSAT software.
Andersen, Per Helge +1 more
core +1 more source
A Historical Review of U.S. Contributions to the Atomic Redefinition of the SI Second in 1967. [PDF]
J Res Natl Inst Stand Technol, 2017 Lombardi MA.
europepmc +1 more source
Spacecraft-spacecraft very long baseline interferometry. Part 1: Error modeling and observable accuracy [PDF]
In Part 1 of this two-part article, an error budget is presented for Earth-based delta differential one-way range (delta DOR) measurements between two spacecraft.
Border, J. S., Edwards, C. D., Jr.
core +1 more source
Revitalizing Astronomical Azimuth Determination: Integrating Modern Computing with Traditional Techniques. [PDF]
Sensors (Basel)Barazzetti L.
europepmc +1 more source
Improving High-Precision BDS-3 Satellite Orbit Prediction Using a Self-Attention-Enhanced Deep Learning Model. [PDF]
Sensors (Basel)Xie S, Li J, Cai J.
europepmc +1 more source
A novel autonomous real-time position method based on polarized light and geomagnetic field. [PDF]
Sci Rep, 2015 Wang Y, Chu J, Zhang R, Wang L, Wang Z.
europepmc +1 more source
Research and Verification of a Novel Interferometry Method by Joint Processing of Downlink Pseudo-Noise Ranging and DOR Signals for Deep Space Exploration. [PDF]
Sensors (Basel)Lu W +5 more
europepmc +1 more source
BDS Precise Point Positioning for Seismic Displacements Monitoring: Benefit from the High-Rate Satellite Clock Corrections. [PDF]
Sensors (Basel), 2016 Geng T +5 more
europepmc +1 more source