Results 21 to 30 of about 41,640 (267)

Informal settlements in Baghdad city [PDF]

open access: yesE3S Web of Conferences, 2021
The research deals with the issue of slums, urban sprawl on agriculture land and its impact on the city of Baghdad. This topic needs close attention because it has become a problem facing the city of Baghdad through recruiting agricultural lands and ...
Repeva Anastasia
doaj   +1 more source

Method of determining the coordinates of the radio signal source in satellite communication systems

open access: yesКосмические аппараты и технологии, 2023
Telecommunications have penetrated deeply into all spheres of human activity. Due to the use of digital technologies, it has become possible to transmit and receive information of various kinds in one stream (not separately).
R. S. Blumberg   +2 more
doaj   +1 more source

IRREGULAR SATELLITE CAPTURE BY EXCHANGE REACTIONS [PDF]

open access: yesThe Astronomical Journal, 2008
The study of the origin of irregular satellites remains important in planetary science because it provides constraints on the formation process of giant planets and probes the properties of a now-extinct planetesimal disk that existed at 5-30 AU early in solar system history.
David Vokrouhlický   +2 more
openaire   +1 more source

NEOWISE: Observations of the Irregular Satellites of Jupiter and Saturn [PDF]

open access: yes, 2015
We present thermal model fits for 11 Jovian and 3 Saturnian irregular satellites based on measurements from the WISE/NEOWISE dataset. Our fits confirm spacecraft-measured diameters for the objects with in situ observations (Himalia and Phoebe) and ...
Bauer, James M.   +7 more
core   +2 more sources

Irregular satellite capture during planetary resonance passage [PDF]

open access: yesIcarus, 2006
Abstract The passage of Jupiter and Saturn through mutual 1:2 mean-motion resonance has recently been put forward as explanation for their relatively high eccentricities [Tsiganis, K., Gomes, R., Morbidelli, A., Levison, H.F., 2005. Nature 435, 459–461] and the origin of Jupiter's Trojans [Morbidelli, A., Levison, H.F., Tsiganis, K., Gomes, R., 2005.
Matija Ćuk, Brett J. Gladman
openaire   +2 more sources

A Survey for Outer Satellites of Mars: Limits to Completeness [PDF]

open access: yes, 2004
We surveyed the Hill sphere of Mars for irregular satellites. Our search covered nearly the entire Hill Sphere, but scattered light from Mars excluded the inner few arcminutes where the satellites Phobos and Deimos reside. No new satellites were found to
Burns J. A.   +7 more
core   +1 more source

Large-Scale, Multiple Level-of-Detail Change Detection from Remote Sensing Imagery Using Deep Visual Feature Clustering

open access: yesRemote Sensing, 2021
In the era of big data, where massive amounts of remotely sensed imagery can be obtained from various satellites accompanied by the rapid change in the surface of the Earth, new techniques for large-scale change detection are necessary to facilitate ...
Rasha S. Gargees, Grant J. Scott
doaj   +1 more source

Combining OC-SVMs With LSTM for Detecting Anomalies in Telemetry Data With Irregular Intervals

open access: yesIEEE Access, 2020
To ensure the safety and stability of spacecrafts of which thousands of telemetry parameters are monitored, fast and accurate response to anomalies or potential hazards is very important and challenging. This task becomes more difficult when the obtained
Junfeng Wu   +4 more
doaj   +1 more source

A Real-Time Linear Prediction Algorithm for Detecting Abnormal BDS-2/BDS-3 Satellite Clock Offsets

open access: yesRemote Sensing, 2023
Due to space environment interference, imperfect data processing model, and the performance of atomic clocks, real-time satellite clock products often contain outliers or irregular biases.
Yaping Gao   +6 more
doaj   +1 more source

Aerial Imagery Based on Commercial Flights as Remote Sensing Platform

open access: yesSensors, 2020
Remote sensing is commonly performed via airborne platforms such as satellites, specialized aircraft, and unmanned aerial systems (UASs), which perform airborne photography using mounted cameras.
Toni Mastelic   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy