A5052546221- Geophysics and Gravity Measurements
- Inertial Sensor and Navigation
- GNSS positioning and interference
- Geomagnetism and Paleomagnetism Studies
- Solar and Space Plasma Dynamics
- Meteorological Phenomena and Simulations
- Climate variability and models
- Astronomical Observations and Instrumentation
- Target Tracking and Data Fusion in Sensor Networks
- Adaptive optics and wavefront sensing
- Geophysical Methods and Applications
- Cardiac, Anesthesia and Surgical Outcomes
- Statistical and numerical algorithms
- Reservoir Engineering and Simulation Methods
- Planetary Science and Exploration
- Satellite Image Processing and Photogrammetry
- Oceanographic and Atmospheric Processes
- Geological Modeling and Analysis
- Marine and coastal ecosystems
- Russia and Soviet political economy
- Adversarial Robustness in Machine Learning
- Anesthesia and Pain Management
- Enhanced Recovery After Surgery
- Economic Issues in Ukraine
All India Institute of Medical Sciences Rishikesh
2022
Jet Propulsion Laboratory
2019-2021
Leibniz University Hannover
2015-2018
University of East Anglia
2007-2008
Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) was launched on May 22, 2018. It carries the Laser Ranging Interferometer (LRI) as a technology demonstrator that measures inter-satellite range with nanometer precision using laser-link between satellites. To maintain satellites, LRI uses beam steering method: Fast Steering Mirror (FSM) is actuated to correct for misalignment incoming outgoing laser beams. From FSM commands, we can compute pitch yaw angles. These angles provide...
This paper introduces v0.5 of the AI Safety Benchmark, which has been created by MLCommons Working Group. The Benchmark designed to assess safety risks systems that use chat-tuned language models. We introduce a principled approach specifying and constructing benchmark, for covers only single case (an adult chatting general-purpose assistant in English), limited set personas (i.e., typical users, malicious vulnerable users). new taxonomy 13 hazard categories, 7 have tests benchmark. plan...
Abstract. For further improvements of gravity field models based on Gravity Recovery and Climate Experiment (GRACE) observations, it is necessary to identify the error sources within recovery process. Observation residuals obtained during contain most measurement modeling errors thus can be considered a realization actual errors. In this work, we investigate ability wavelets help in identifying specific GRACE range-rate residuals. The multiresolution analysis (MRA) using discrete wavelet...
Abstract A single‐valued wavelet‐coefficient score is proposed for assessing the similarity of two‐dimensional climate‐data fields (matrices). It based on comparison wavelet‐decomposition coefficients by means a mean‐squared‐error skill score. Two applications are illustrated: real and model maps; two maps. The issue missing data addressed, evaluation performed both when available over continents or oceans only, they globally, whole domain. tested against conventional correlation...
For missions such as GRACE, precise knowledge of the satellite's attitude is a fundamental requirement for realization intersatellite ranging principle. It not only essential in-orbit pointing but also recovery accurate temporal gravity field models. Here, we present comparative study two datasets. One them standard SCA1B RL02 datasets provided by JPL NASA, and another fused dataset computed at TU Graz, based on combination ACC1B angular accelerations quaternions. Furthermore, impact range...
For the missions like GRACE, precise knowledge of satellite’s attitude is a fundamental requirement forthe realization inter-satellite ranging principle. It not only essential for in-orbit intersatellitepointing, but also recovery accurate temporal gravity field models. Here we present comparative studyof two datasets. One them standard SCA1B RL02 datasets provided by JPL NASA and another fusedattitude dataset computed at TU Graz, based on combination ACC1B angular accelerations...
Abstract. For further improvements of gravity field models based on Gravity Recovery and Climate Experiment (GRACE) observations, it is necessary to identify the error sources within recovery process. Observation residuals obtained during contain most measurement modeling errors thus can be considered as a realization actual errors. In this work, we investigate ability wavelets help in identifying specific GRACE range rate residuals. The Multi-Resolution Analysis (MRA) using Discrete Wavelet...
The precision of the attitude in inter-satellite ranging missions like GRACE is one important requirement. It required not only for mission performance but also good quality gravity field models which are estimated from measurements. Here we present a comparative study analysis two datasets. One them standardSCA1Brelease 2 datasets provided by JPL NASA and another reprocessed computed atTU Graz combining angular accelerations standardSCA1Brelease2 Further, impact on range measurements...
<p>Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) carries the Laser Ranging Interferometer (LRI) as a technology demonstrator that measures inter-satellite range with nanometer precision. For precise laser beam pointing, LRI uses steering method where fast mirror is actuated to correct for misalignment between incoming outgoing beams. From commands, we can compute pitch yaw angles. These angles are provided LSM1B product represent spacecraft's relative orientation...