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Croonquist, A.

Publications and source records attributed to Croonquist, A..

At least 19 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS2016

Overview of Optical Ground Station 1 of the NASA Space Communications and Navigation Program

Optical Ground Station 1 (OGS1) is the first of a new breed of dedicated ground terminals to support NASA’s developing space-based optical communications infrastructure. It is based at NASA’s Optical Communications Telescope Laboratory (OCTL) at the Table Mountain Observatory near Wrightwood, CA. The system will serve as the primary ground station for NASA’s Laser Communications Relay Demonstration (LCRD) experiment. This paper presents an overview of the OCTL telescope facility, the OGS1 ground-based optical communications systems, and the networking and control infrastructure currently under development. The OGS1 laser safety systems and atmospheric monitoring systems are also briefly described.

Optical Channel↗
NASA NTRS2002

The Low Temperature Microgravity Physics Facility

The Low Temperature Microgravity Physics Facility currently in the design phase is a multiple user and multiple flight facility intended to provide a long duration low temperature environment onboard the International Space Station.

microgravity physics facility↗
NASA NTRS2002

Integrate test and qualify NASA facility class payloads on the ISS JEM-EF

This paper describes the processes that the Low Temperature Microgravity PhysicsFacility (LTMPF) follows or will follow to meet the qualification requirements imposed by the Jet Propulsion Laboratory (JPL), by the Microgravity Research Program Office (MRPO) at MSFC, by the ISS Payloads Office (OZ) at JSC, and by NASDA's JEM Element Integration Office.

ISS payloads LTMPF JEM-EF↗
NASA NTRS2000

The Development of the Low Temperature Microgravity Physics Facility

We describe the design and development of the Low Temperature Microgravity Physics Facility, which is intended to provide long duration (4.5 months) low temperature (1.4K) and microgravity conditions for scientists to perform breakthrough investigations on board the International Space Station.

Low Temperature Fundamental Physics Microgravity P↗
NASA NTRS2000

The Low Temperature Microgravity Physics Facility Project

We describe the design and development of the Low Temperature Microgravity Physics Facility, which is intended to provide a unique environment of low temperature and microgravity for the scientists to perform breakthrough investigations on board the International Space Station.

Low Temperature Microgravity Space ISS↗
NASA NTRS1985

Acoustic Levitation System

Dense materials, such as steel balls, continuously levitated with energy provided by efficient high-powered siren in combination with shaped reflector. Reflector system, consisting of curved top reflector and flat lower reflector, eliminates instability in spatial positioning of sample.

Gammell, P. M.↗
NASA NTRS1984

Contactless Measurement of Physical Properties

Surface tension and other properties determined from measurement of resonant frequency. Surface tension and other physical properties of molten and liquid samples excited at resonance measured by observing photographic or TV image and noting resonant frequency and rate of change. Technique used in normal gravity and low gravity in either vacuum or gaseous environment, where sample is positioned by electrostatic, acoustic, or magnetic forces.

Elleman, D. D.↗