Tech Briefs Magazine - July 2021 - 24

Aeronautics
governing these measurements, to produce
an optimal estimate of the spacecraft's
orbit. GEONS high-fidelity state
dynamics model reduces sensitivity to
measurement errors and provides highaccuracy
velocity estimates, permitting
accurate state prediction during signal
outages or degraded coverage.
Autonomous navigation reduces total
mission cost by eliminating the need for
routine, ground-based orbit determination
and special tracking services and is
required for advanced mission concepts
such as satellite formation flying.
GEONS was designed for autonomous
operation within the very limited re -
sources of an onboard computer. Au -
tonomous initialization and enhanced
fault detection capabilities are implemented
using in stantaneous geometric
GPS solutions.
By incorporating information from
past measurements, GEONS provides
highly accurate orbit estimates even with
one visible GPS space vehicle and even
during signal outages or degraded coverage.
types
of measurements are all incorporated
into the GEONS software, producing
a navigation system capable of handling
multiple orbit regimes and navigation
subsystems while requiring no additional
hardware. Fusion of these data
types increases system stability and reliability
and enables graceful degradation
if a component fails during orbit.
NASA is actively seeking licensees to comAdditionally,
GEONS processes
Dop pler measurement data from on -
board attitude sensors. These different
mercialize this technology. Please contact
NASA's Licensing Concierge at Agency-PatentLicensing@mail.nasa.gov
or call us at 202358-7432
to initiate licensing discussions.
Follow this link for more information: https://
technology.nasa.gov/patent/TOP5-709.
High-Altitude Unmanned Aerial Vehicle (UAV) for
Monitoring Meteorological Parameters
The system uses infrasonic acoustics for weather monitoring and for drone or UAV activity.
Langley Research Center, Hampton, Virginia
A
coustical studies of atmospheric
events like convective storms, tornadoes,
shear-induced turbulence, micro -
bursts, acoustic gravity waves, and hurricanes
over the past 50 years have established
that these events are strong emitters
of infrasound. Current methods to
forecast near-term weather phenomenon
is electromagnetic (EM)-based ra -
dar and data from radiosondes.
Radar is an active remote sensor with
limited range and there is the possibility
that
radar beams will overshoot
the
mesocyclonic circulation. There is also a
possibility that mesocyclonic circulation
cannot be detected because of the conal
region immediately above the radar set.
Radiosondes are launched twice a day
from different locations of the world
and meteorological data is collected to
plot the STUV diagram and determine
CAPE (Cumulative Average Potential
Energy) values. Radiosondes are not re -
usable and used only at pre-determined
locations around the globe. Moreover, a
radiosonde can drift up to 125 miles
from its release point. About 75,000 radio -
sondes are used every year.
Given this unmet need, NASA developed
an advanced airborne meteorological
system that can provide meteorological
parameters at any location at any
desired time. In addition to routinely
used meteorological sensors, an infrasonic
sensor is also included to determine
wind shear at local and regional
levels. The airborne system may also be
24
Cov
Speed
Boundary Layer
Instabilities Audio
Infrasound
radius
Radial Core Vibrations Infrasound
Core Bursting
Infrasound/Audio
Shear Instabilities Audio
Infrasonic sound generation.
used in towns and cities to track drones
and UAVs in the area.
The airborne vehicle (UAV or drone)
should be able to track seismic waves,
magnetic storms, magneto-hydrodynamic
waves, tornadoes, meteors, lightning,
etc. This technology can be used to meas -
ure environmental turbulence including
wind shear, vortices, and large and small
eddies - an important factor in forecasting
local and regional weather. It can
also detect infrasound at ranges of many
www.techbriefs.com
ToC
miles from the source and the shape of
the acoustic power spectrum can be
used to identify the type of turbulence in
the atmosphere.
NASA is actively seeking licensees to commercialize
this technology. Please contact
NASA's Licensing Concierge at AgencyPatent-Licensing@mail.nasa.gov
or call us
at 202-358-7432 to initiate licensing discussions.
Follow this link for more information:
https://technology.nasa.gov/patent/LARTOPS-281.
Tech
Briefs, July 2021
https://technology.nasa.gov/patent/TOP5-709 https://technology.nasa.gov/patent/LAR-TOPS-281 http://www.techbriefs.com http://www.abpi.net/ntbpdfclicks/l.php?202107TBNAV

Tech Briefs Magazine - July 2021

Table of Contents for the Digital Edition of Tech Briefs Magazine - July 2021

Tech Briefs Magazine - July 2021 - Intro
Tech Briefs Magazine - July 2021 - Sponsor
Tech Briefs Magazine - July 2021 - Cov1
Tech Briefs Magazine - July 2021 - Cov2
Tech Briefs Magazine - July 2021 - 1
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Tech Briefs Magazine - July 2021 - Cov3
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