To improve understanding of super heavy-lift rocket acoustics, this letter documents initial findings from noise measurements during liftoff of the Space Launch System's Artemis-I mission. Overall sound pressure levels, waveform characteristics, and spectra are described at distances ranging from 1.5 to 5.2 km. Significant results include: (a) the solid rocket boosters' ignition overpressure is particularly intense in the direction of the pad flame trench exit; (b) post-liftoff maximum overall levels range from 127 to 136 dB, greater than pre-launch predictions; and (c) the average maximum one-third-octave spectral peak occurred at 20 Hz, causing significant deviation between flat and A-weighted levels.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1121/10.0016878 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Galactic cosmic ray environment predictions for the NASA BioSentinel Mission, part 2:Post-mission validation.
Life Sci Space Res (Amst)
February 2025
NASA Ames Research Center, Moffett Field, CA 94035, United States.
The BioSentinel CubeSat was deployed on the Artemis-I mission in November 2022 and has been continuously transmitting physical measurements of the space radiation environment since that time. Just before mission launch, we published computational model predictions of the galactic cosmic ray exposure expected inside BioSentinel for multiple locations and configurations. The predictions utilized models for the ambient galactic cosmic ray environment, radiation physics and transport, and BioSentinel geometry.
View Article and Find Full Text PDFNIGWO-iCaps NN: A Method for the Fault Diagnosis of Fiber Optic Gyroscopes Based on Capsule Neural Networks.
Micromachines (Basel)
January 2025
Beijing Institute of Space Launch Technology, Beijing 100076, China.
When using a fiber optic gyroscope as the core measurement element in an inertial navigation system, its work stability and reliability directly affect the accuracy of the navigation system. The modeling and fault diagnosis of the gyroscope is of great significance in ensuring the high accuracy and long endurance of the inertial system. Traditional diagnostic models often encounter challenges in terms of reliability and accuracy, for example, difficulties in feature extraction, high computational cost, and long training time.
View Article and Find Full Text PDFImplementation of a sexual health clinic in an oncology setting: patient and provider perspectives.
BMC Health Serv Res
January 2025
Division of Urology, Department of Surgery, University Health Network, University of Toronto, Toronto, ON, M5T 2SB, Canada.
Background: Sexual dysfunction is prevalent among cancer survivors, significantly impacting patient and partner quality of life. Despite this, sexual health clinics (SHCs) remain rare in cancer centres across Canada. An innovative clinic was developed at Princess Margaret Cancer Centre in Toronto, Canada to address this significant gap in survivorship care.
View Article and Find Full Text PDFBackground: Young people face high rates of mental health issues, yet many do not seek professional help. In 2017, CHAT launched webCHAT - a free, anonymous, one-on-one synchronous web-based text service managed by case managers (CMs) to support young people aged 16 to 30 who may be hesitant about engaging in face-to-face mental health services.
Objective: This study aimed to explore the perspectives and experiences of users who accessed webCHAT for mental health support in Singapore.
Simulated deep space exposure on seeds utilizing the MISSE flight facility.
NPJ Microgravity
January 2025
NASA John F. Kennedy Space Center, Kennedy Space Center, Merritt Island, FL, USA.
The MISSE-Seed project was designed to investigate the effects of space exposure on seed quality and storage. The project tested the Multipurpose Materials International Space Station Experiment-Flight Facility (MISSE-FF) hardware as a platform for exposing biological samples to the space environment outside the International Space Station (ISS). Furthermore, it evaluated the capability of a newly designed passive sample containment canister as a suitable exposure unit for biological samples for preserving their vigor while exposing to the space environment to study multi-stressor effects.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!