Results 21 to 30 of about 23,934,500 (209)
Atmospheric refraction corrections in ground-to-satellite optical time transfer.
Optics Express, 2021 Free-space optical time and frequency transfer techniques can synchronize fixed ground stations at the femtosecond level, over distances of tens of kilometers. However, optical time transfer will be required to span intercontinental distances in order to
B. Stuhl
semanticscholar +1 more source
Relativistic modeling of atmospheric occultations with time transfer functions [PDF]
Astronomy & Astrophysics, 2020 Context. Occultation experiments represent unique opportunities to remotely probe the physical properties of atmospheres. The data processing involved in modeling the time and frequency transfers of an electromagnetic signal requires that refractivity be
A. Bourgoin +14 more
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Frontiers in Earth Science, 2023 Determination of the Earth’s gravity field and geopotential value is one of the fundamental topics in physical geodesy. Traditional terrestrial gravity and precise leveling measurements can be used to determine the geopotential values at a local or ...
Mohammad Bagherbandi +4 more
doaj +1 more source
Remote Sensing, 2020 In high-precision GPS precise point positioning (PPP) time transfer, errors caused by the effect of ionosphere delay have to be corrected. Usually the ionosphere-free combinations of the pseudo code and the carrier phase is used in GPS PPP data ...
Haiyan Yang +4 more
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A BDGIM-Based Phase-Smoothed Pseudorange Algorithm for BDS-3 High-Precision Time Transfer
Applied Sciences, 2022 Single point positioning (SPP) can meet the requirements of the majority of real-time time transfer applications. Meanwhile, a single-frequency (SF) receiver is cheaper than a dual-frequency receiver.
Jian Tang, Daqian Lyu, Fangling Zeng
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Retirement, intergenerational time transfers, and fertility [PDF]
European Economic Review, 2020 Abstract Retired parents might invest time in their adult children by providing childcare. Such intergenerational time transfers can have important implications for family decisions. This paper estimates the effects of parental retirement on the fertility of their adult children.
Eibich, Peter, Siedler, Thomas
openaire +4 more sources
Remote Sensing, 2021 The modernized GPS, Galileo, and BeiDou global navigation satellite system (BDS3) offers new potential for time transfer using overlap-frequency (L1/E1/B1, L5/E5a/B2a) observations.
Pengfei Zhang +5 more
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Multipurpose Laser Instrument for Interplanetary Ranging, Time Transfer, and Wideband Communications
Photonics, 2023 In this paper, we discuss the design and feasibility of a multifunctional laser instrument capable of precision ranging, time transfer, and wideband communications over interplanetary distances throughout our solar system.
John J. Degnan
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Improved Multi-GNSS PPP Software for Upgrading the DEMETRA Project Time Monitoring Service
Sensors, 2019 The H2020 DEMETRA project provides short latency clock monitoring services to the time users using the Atomium precise point positioning (PPP) software developed by the Royal Observatory of Belgium.
Wei Huang +3 more
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Navigation, 2023 There is growing interest in designing a future lunar navigation satellite system (LNSS) while utilizing a SmallSat platform. However, many design decisions, e.g., regarding the satellite clock and lunar orbit, are yet to be finalized. In our prior work,
Sriramya Bhamidipati +2 more
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