Physical Sciences


Briefs: Software
Improved Math Model for Multiphoto Measurement Systems

The bundle adjustment, or more specifically, the colinearity math model it is based on, is undisputedly the most accurate method to perform 3D scene reconstruction from multiple images. It has...

Briefs: Software
Multipurpose Attitude and Pointing System (MAPS) Version 6.2

MAPS is a suite of software tools used for pre-flight planning, real-time support, and post-flight analysis of spacecraft attitude and pointing for the International Space Station (ISS),...

Briefs: Physical Sciences
Steady-State Thermal Test Methodology

This innovation provides the following thermal properties data from a single steady-state test run: the effective thermal conductivity value (ke) for the full temperature difference, and multiple...

Briefs: Physical Sciences
Silicon Carbide Power Processing Unit for Hall Effect Thrusters

A high-efficiency, rad-hard, 3.5-kW SiC power supply was developed for the power processing unit (PPU) of Hall effect thrusters. This work specifically targets the design of a PPU...

Briefs: Physical Sciences
Intensity-Calibrated Hydrogen Flame Spectrum

The National Aeronautics and Space Administration (NASA) uses large quantities of liquid hydrogen and has expended significant effort in the development, testing, installation, and maintenance of...

Briefs: Physical Sciences
Exciting and Detecting Electromagnetic Energy in a High-Temperature Microwave Cavity

There is a need to perform accurate, high-temperature, complex dielectric constant measurements at microwave frequencies on materials, such as those on the...

Briefs: Physical Sciences
Hollow aErothermal Ablation and Temperature (HEAT) Sensor for Tracking Isotherm Through TPS Material

The Hollow aErothermal Ablation and Temperature (HEAT) sensor is a multifunction sensor designed to track an isotherm by making an independent...

Briefs: Physical Sciences
Hydrogen Measurement in a Cryogen Flow Stream Reduces Waste of Helium

The purpose of this research was to develop an improved method for measuring hydrogen concentrations in a cryogen flow stream to minimize helium waste during the purge process....

Briefs: Physical Sciences
Noncontact DC and AC Magnetostrictive Current Sensor

At the time of this reporting, there have been no effective methods of monitoring current in conductors in space without breaking the circuit or making contact with the conductor. In space,...

Briefs: Physical Sciences
Method and Apparatus for Determining Propellant Mass in Microgravity by Capacitance Measurements

Propellant mass gauging in microgravity has posed a challenge for decades. Various methods have been applied, including ultrasonic, capacitance...

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