A5101829734- GNSS positioning and interference
- Geophysics and Gravity Measurements
- Inertial Sensor and Navigation
- Ionosphere and magnetosphere dynamics
- Advanced Frequency and Time Standards
- Space Satellite Systems and Control
- Geomagnetism and Paleomagnetism Studies
- Remote Sensing and Land Use
- Spacecraft Design and Technology
- Astronomical Observations and Instrumentation
- Atomic and Subatomic Physics Research
- Planetary Science and Exploration
- Target Tracking and Data Fusion in Sensor Networks
- Earthquake Detection and Analysis
- Single-cell and spatial transcriptomics
- Precipitation Measurement and Analysis
- Statistical and numerical algorithms
- Health, Environment, Cognitive Aging
- Astro and Planetary Science
- Genomics and Chromatin Dynamics
- Genetic Mapping and Diversity in Plants and Animals
- Environmental Changes in China
- Spacecraft Dynamics and Control
- Oceanographic and Atmospheric Processes
- Solar and Space Plasma Dynamics
Jet Propulsion Laboratory
2008-2024
University of Pennsylvania
2023-2024
China University of Mining and Technology
2020
California University of Pennsylvania
2018
California Institute of Technology
2003-2015
Chinese Academy of Sciences
2010-2014
Institute of Urban Environment
2014
State Key Laboratory of Remote Sensing Science
2010
University of Chinese Academy of Sciences
2010
Nanjing University of Information Science and Technology
2010
The German Challenging Minisatellite Payload (CHAMP) and Argentine Satelite de Aplicaciones Cientificas‐C (SAC‐C) Earth science missions, launched in 2000, carry a new generation of Global Positioning System (GPS) receivers for radio occultation sounding the ionosphere neutral atmosphere. Though concept obtaining profiles atmospheric temperature, pressure, moisture was proven 1995 with GPS/MET, concurrent measurements from CHAMP SAC‐C present first opportunity preliminary evaluation three...
We assess the accuracy of JPL's estimated OSTM/Jason-2 Global Positioning System (GPS)-determined orbits based on residuals to independent satellite laser ranging (SLR) data, compared with produced by different software from data (SLR/DORIS), Geophysical Data Record version C (GDR-C) orbits, and altimeter crossover tests. All these tests are consistent sub-cm radial accuracy: high elevation SLR residual standard deviation lies at 6.8 mm, RMS differences GDR-C in component typically fall...
Abstract This study presents, for the first time ever, occulting signals of Global Navigation Satellite Systems (GNSSs) acquired at two polarizations from a Low Earth Orbiter, and it shows that they sense heavy precipitation. The data sets are obtained early stages Radio Occultation Heavy Precipitation experiment aboard PAZ satellite, launched in February 2018 activated May 2018. Preliminary calibration algorithms applied to remove other systematic effects, resulting vertical profiles...
We introduce Baichuan-Omni-1.5, an omni-modal model that not only has understanding capabilities but also provides end-to-end audio generation capabilities. To achieve fluent and high-quality interaction across modalities without compromising the of any modality, we prioritized optimizing three key aspects. First, establish a comprehensive data cleaning synthesis pipeline for multimodal data, obtaining about 500B (text, audio, vision). Second, audio-tokenizer (Baichuan-Audio-Tokenizer) been...
The RL07 series of GRACE gravity field products generated at JPL is a reprocessing updated Level 1 data for the entire mission duration. Some aspects 2 processing have been from RL06 series, in an effort to improve solution quality and uncertainty quantification.Level improvements include co-estimation use full observation covariance matrices both GPS inter-satellite ranging KBR observations, background (GOCO06s) other models. updates ensure consistency continuity with GRACE-FO record, which...
NAVIGATION is a quarterly journal published by the Institute of Navigation. The publishes original, peer-reviewed articles on all aspects positioning, navigation, and timing. also selected technical notes survey articles, as well papers exceptional quality drawn from Institute’s conference proceedings.
From May 2 through 7 of 2008, the Autonomous Landing and Hazard Avoidance Technology (ALHAT) Exploration Development Program carried out a helicopter field test to assess use flash LIDAR as primary sensor during lunar landing. The data has been used evaluate performance system algorithms for Detection Avoidance, Relative Navigation, Passive Optical Terrain Navigation. Reported here is comprehensive description hardware, ground infrastructure trajectory reconstruction methodologies.
Atmospheric soundings derived from Global Positioning System radio occultations (GPSRO) acquired in low-Earth orbit have the potential to be global climate benchmark observations of significant value Climate Observing (GCOS). Geophysical observables such as atmospheric pressure and temperature are by measuring propagation delay induced atmosphere, a measurement whose fundamental unit-the second-is absolutely determined calibration against atomic clocks. In this paper, we analyze sources...
Each of the six COSMIC satellites carries one GPS receiver with two antennas for orbit determination (OD) and another radio occultation. In this paper we describe features data associated satellite attitude. Method results precise using tracking from both OD are presented. Special issues in multiple discussed. Orbit precision is evaluated effects multipath errors investigated.
Abstract We describe the development and assessment of a new terrestrial reference frame (TRF) based on combination geodetic techniques at observation level over period 2010–2022. Included in solution are observations from Global Positioning System (GPS), Satellite Laser Ranging (SLR) Very Long Baseline Interferometry (VLBI). A key feature our strategy is use space ties low‐Earth orbit to connect SLR GPS. Though resulting TRF only 12.6 years data, it competitive with international (ITRF2020)...