Pluto-Kuiper express mock-up spacecraft acoustic test results
Explore the source record for details and available documents.
acoustics vibroacoustics SEA VAPEPS spacecraft Jup↗
Engineering topics
Fernandez, J.
Publications and source records attributed to Fernandez, J..
Cryogenic MMIC Low Noise Amplifiers
Monolithic (MMIC) and discrete transistor (MIC) low noise amplifiers are compared on the basis of performance, cost, and reliability. The need for cryogenic LNA's for future large microwave arrays for radio astronomy is briefly discussed and data is presented on a prototype LNA for the 1 to 10 GZH range along with a very wideband LNA for the 1 to 60 GHz range.
MMIC Low-noise amplifier↗
Measurement Techniques for Cryogenic Low Noise GAAS and INP HEMT Amplifiers
With operational spacecraft in excess of 10 astronomical units from Earth, NASA's Deep Space Network requires sensitive receivers for detection of weak spacecraft signals.
cryogenic measurement low noise Galium Arsenide In↗
Vibroacoustic Response of Solar Panels: Case Study
Large surface area, lightweight structures, such as solar panels, are easily excited by sound and often experience high acceleration responses during acoustic tests.
SEA vibroacoustics VAPEPS case study D-11341↗
Hand-held terminal antennas for personal satellite communications
This paper deals with two hand-held antenna types operating with geostationary and medium earth orbit (GEO and MEO) satellite systems. They could be applied to the low earth orbit (LEO) and highly elliptical orbit (HEO) systems respectively doing the appropriate frequency scale designs. The first one is a lambda/2 (1/2 turn) quadrifilar helix (quasi-hemispherical coverage), and the second one is a self-diplexed antenna made of a circular patch and a short-circuited ring patch in stacked configuration (zenithal coverage).
Caballero, J. E.↗
VAPEPS Management Center
A VibroAcoustic Payload Environment Prediction System (VAPEPS) Management Center is established and being maintained at JPL. VAPEPS is a computer program that utilizes statistical energy analysis (SEA) theory and SEA extrapolation methods to predict the vibroacoustic environments of complex systems. The program is commonly utilized to establish random vibration and acoustic test requirements for aerospace components exposed to launch environments. It can also be used in the payload or launch vehicle design process for control or mitigation of the launch or on-orbit vibration and acoustic environments, as well as to calculate acoustically induced stresses in structures such as solar panels and reflectors.
VAPEPS↗
VAPEPS Management Center
VAPEPS is a computer program that utilizes statistical energy analysis (SEA) theory and SEA extrapolation methods to predict the vibroacoustic environments in complex systems.
vibroacoustic↗