Home

Development of a Multi-User Modem for Space Telecommunications

This technology has applications in the cellphone industry. NASA’s Jet Propulsion Laboratory, Pasadena, California Efficient support of planetary surface missions typically requires an orbiting asset that acts as a relay point to/from Earth. Orbital relay passes are normally 5 to 15 minutes in duration over any specific landed site. When multiple landed assets are co-located or near-located in the same coverage circle of a single relay orbiter, their telecom relay support opportunities will overlap. This will be the case with cooperative lander missions, a lander-rover operations pair, distributed intelligent lander missions, and future deployment of multiple equipment components for support of complex sample return or manned operations. In these situations, the capability of simultaneous support to multiple landers is very valuable for mission performance and operations flexibility. This technology work enables simultaneous telecom support to multiple landers (Mars, Titan, Europa), and provides single-radio, multi-mode support to Entry, Descent & Landing (EDL) and emergency operations (e.g., demodulation + Open Loop Recording).

Posted in: Briefs, TSP

Read More >>

Wire Bonding to Pads in Tilted Planes

This technique can be used in industries where devices need to be made smaller and lighter, such as medical, aerospace, automotive, and military. NASA’s Jet Propulsion Laboratory, Pasadena, California Scientific imaging arrays need to have their individual imaging elements arranged in a close-spaced mosaic. The typical single imaging element is a silicon chip mounted on a larger support frame. This excess area of the support frame takes away valuable imaging space from the mosaic. This appears as a grid of black (no data) in the overall mosaic image. Making the support frame smaller makes the amount of lost data smaller, and the imaging elements can be spaced more closely together. Eliminating the support frame altogether brings the imaging elements even closer. This is referred to as four-side buttable.

Posted in: Briefs, TSP

Read More >>

cFE/CFS Evolution for Multicore Platforms

Goddard Space Flight Center, Greenbelt, Maryland This effort ports the Core Flight Executive (cFE)/Core Flight System (CFS) flight software architecture to multicore processor platforms, and provides mission developers with a common, flightready, flexible software environment that supports single, multi-processor, and multicore systems. Currently the cFE/CFS only supports single-core processors.

Posted in: Briefs, TSP

Read More >>

Advanced Spacecraft Navigation and Timing Using Celestial Gamma-Ray Sources

This technology can decrease the overall operations cost of exploration missions by increasing the onboard navigation and guidance capabilities. Goddard Space Flight Center, Greenbelt, Maryland The Advanced Spacecraft Navigation and Timing using Celestial Gamma-Ray Sources concept is a novel relative navigation technology for deep-space exploration using measurements of celestial gamma-ray sources. This new Gamma-ray source Localization-Induced Navigation and Timing (GLINT) method incorporates existing designs of autonomous navigation technologies and merges these with the developing science of high-energy sensor components. This new enabling technology for interplanetary self-navigation could provide important mission enhancements to planned operational and discovery missions. It has the potential to decrease the overall operations cost of exploration missions by increasing the onboard navigation and guidance capabilities, and reducing the risk of uncertainty by providing these vehicles the freedom to explore those areas that are most interesting.

Posted in: Briefs, TSP, Sensors

Read More >>

Generating a Laser Linear Frequency Modulation Waveform for Application in Coherent Doppler Lidar

A remote laser sensor system using this technique can enhance aircraft navigation and increase efficiency, and reduce the cost of manufacturing large structures. Langley Research Center, Hampton, Virginia Frequency modulation of a single-frequency laser with a linear triangular waveform is of great interest to many laser remote sensing and interferometry applications. Linear frequency modulation of a continuous-wave (CW) laser beam can make target distance measurements with great precision. If the frequency modulation is perfectly linear with time, such a laser radar (lidar) system will have higher resolution and accuracy compared with pulsed lasers.

Posted in: Briefs, Sensors

Read More >>

Outlier Detection Via Estimating Clusters

Ames Research Center, Moffett Field, California The Outlier Detection Via Estimating Clusters (ODVEC) software provides an efficient method for real-time or offline analysis of multivariate sensor data for use in anomaly detection, fault detection, and system health monitoring. ODVEC uses models automatically derived from archived system data to identify unusual, out-of-family data samples (outliers) that indicate possible system failure or degradation. It employs novel techniques to efficiently calculate the degree of deviation of current system behavior from a range of previous, similar nominal operations.

Posted in: Briefs, Sensors

Read More >>

Wideband Single-Crystal Transducer for Bone Characterization

Broadband, highly sensitive, single-crystal piezoelectric transducers are applicable for bone characterization, medical ultrasound imaging, ultrasound NDE, and therapeutic applications. John H. Glenn Research Center, Cleveland, Ohio The microgravity conditions of space travel create unique physiological demands on the astronauts’ skeletal structures, resulting in a reduction in bone strength from restructuring of the micro-architecture and loss of key minerals. An ultrasound system was developed that is capable of quantitatively correlating a series of measurement parameters to the physiology. The Nautilus transducer is a spiral-wrapped ultrasound transducer fabricated from piezoelectric Mn:PIN-PMN-PT single crystal that uses micromachining to take advantage of unique resonance modes within the crystal. The combination of integration of a single crystal and use of multiple resonances provided a bandwidth superior to commercial devices with the capacity for high sensitivity.

Posted in: Briefs, Sensors

Read More >>