Results 11 to 20 of about 1,119,124 (293)
Geo-spatial Information Science, 2022 With the development of the Low Earth Orbit (LEO) communication constellations, it has become a hot area of research to provide additional navigation augmentation services.
Ziqian Wu +5 more
doaj +1 more source
LEO satellite clock analysis and prediction for positioning applications
Geo-spatial Information Science, 2021 The positioning service aided by low Earth orbit (LEO) mega-constellations has become a hot topic in recent years. To achieve precise positioning, accuracy of the LEO clocks is important for single-receiver users. To bridge the gap between the applicable
Kan Wang, Ahmed El-Mowafy
doaj +1 more source
Geo-spatial Information Science, 2022 In recent years, the large Low Earth Orbit (LEO) constellations have become a hot topic due to their great potential to improve the Global Navigation Satellite Systems (GNSS) positioning performance.
Xingxing Li +6 more
doaj +1 more source
Using Technology to Engage Students and Build Learning Communities to Inform Instructional Decisions [PDF]
Athens Journal of Education, 2014 Saint Leo University is a liberal arts university located in southwest Florida. University campus is a residential campus that teaches the traditional aged student.
Carol Todd +4 more
doaj +1 more source
An optimal design of the broadcast ephemeris for LEO navigation augmentation systems
Geo-spatial Information Science, 2022 As the deployment of large Low Earth Orbiters (LEO) communication constellations, navigation from the LEO satellites becomes an emerging opportunity to enhance the existing satellite navigation systems.
Xueli Guo +5 more
doaj +1 more source
Leo V: A Companion of a Companion of the Milky Way Galaxy [PDF]
, 2008 We report the discovery of a new Milky Way dwarf spheroidal galaxy in the constellation of Leo identified in data from the Sloan Digital Sky Survey.
Adelman-McCarthy +33 more
core +3 more sources
Wave optics‐based LEO‐LEO radio occultation retrieval [PDF]
Radio Science, 2016 AbstractThis paper describes the theory for performing retrieval of radio occultations that use probing frequencies in the XK and KM band. Normally, radio occultations use frequencies in the L band, and GPS satellites are used as the transmitting source, and the occultation signals are received by a GPS receiver on board a Low Earth Orbit (LEO ...
Benzon, Hans-Henrik, Høeg, Per
openaire +4 more sources
The elusive old population of the dwarf spheroidal galaxy Leo I [PDF]
, 1999 We report the discovery of a significant old population in the dwarf spheroidal (dSph) galaxy Leo I as a result of a wide-area search with the ESO New Technology Telescope.
Bertelli G. +12 more
core +2 more sources
Regularities of Changes in the Microhardness of Carbon Steels during Gas Laser Cutting [PDF]
MATEC Web of Conferences, 2021 The paper considers the regularities of changes in the microhardness of carbon steels during gas-laser cutting. Quantitative numerical estimates of the extent of the gas-laser thermal influence zone are made.
Minaev Igor V. +3 more
doaj +1 more source
Metallicity Distribution Functions of Four Local Group dwarf galaxies [PDF]
, 2015 We present stellar metallicities in Leo I, Leo II, IC 1613, and Phoenix dwarf galaxies derived from medium (F390M) and broad (F555W, F814W) band photometry using the Wide Field Camera 3 (WFC3) instrument aboard the Hubble Space Telescope.
Anthony-Twarog, Barbara J. +3 more
core +3 more sources