Flight Test of the new Global Hawk Radar Using the Proteus Manned High Altitude Aircraft

2010 ◽  
Author(s):  
David Brown
Keyword(s):  
High Altitude ◽  
Flight Test ◽  
Global Hawk

High Altitude Balloon Flight Test of the GRAD Experiment

1990 ◽  
Author(s):  
Robert J. Hicks ◽  
David H. Jenkins
Keyword(s):  
High Altitude ◽  
Flight Test ◽  
Balloon Flight

scholarly journals The NASA Airborne Tropical Tropopause Experiment: High-Altitude Aircraft Measurements in the Tropical Western Pacific

2017 ◽  
Vol 98 (1) ◽  
pp. 129-143 ◽  
Author(s):  
Eric J. Jensen ◽  
Leonhard Pfister ◽  
David E. Jordan ◽  
Thaopaul V. Bui ◽  
Rei Ueyama ◽  
...  
Keyword(s):  
High Altitude ◽  
Active Species ◽  
Convective Transport ◽  
Western Pacific ◽  
Lower Altitude ◽  
Tropical Tropopause Layer ◽  
Tropical Tropopause ◽  
Cloud Properties ◽  
The Tropics ◽  
Global Hawk

Abstract The February–March 2014 deployment of the National Aeronautics and Space Administration (NASA) Airborne Tropical Tropopause Experiment (ATTREX) provided unique in situ measurements in the western Pacific tropical tropopause layer (TTL). Six flights were conducted from Guam with the long-range, high-altitude, unmanned Global Hawk aircraft. The ATTREX Global Hawk payload provided measurements of water vapor, meteorological conditions, cloud properties, tracer and chemical radical concentrations, and radiative fluxes. The campaign was partially coincident with the Convective Transport of Active Species in the Tropics (CONTRAST) and the Coordinated Airborne Studies in the Tropics (CAST) airborne campaigns based in Guam using lower-altitude aircraft (see companion articles in this issue). The ATTREX dataset is being used for investigations of TTL cloud, transport, dynamical, and chemical processes, as well as for evaluation and improvement of global-model representations of TTL processes. The ATTREX data are publicly available online (at https://espoarchive.nasa.gov/).

Cost-Effective High-Altitude Scientific Balloon Development and its Flight Test

2018 ◽  
Vol 46 (4) ◽  
pp. 345-358
Author(s):  
Jungpyo Kang ◽  
Gyujin Shim ◽  
Hweeho Kim ◽  
Yongseon Lee ◽  
Kwanjung Yee
Keyword(s):  
High Altitude ◽  
Cost Effective ◽  
Flight Test

The High-Altitude MMIC Sounding Radiometer for the Global Hawk Unmanned Aerial Vehicle: Instrument Description and Performance

2011 ◽  
Vol 49 (9) ◽  
pp. 3291-3301 ◽  
Author(s):  
Shannon T. Brown ◽  
Bjorn Lambrigtsen ◽  
Richard F. Denning ◽  
Todd Gaier ◽  
Pekka Kangaslahti ◽  
...  
Keyword(s):  
High Altitude ◽  
Unmanned Aerial Vehicle ◽  
Aerial Vehicle ◽  
And Performance ◽  
Global Hawk

scholarly journals Project of high altitude balloon launched micro glider: Aircraft design, control and flight test

2020 ◽  
Vol 12 ◽  
pp. 175682932097995
Author(s):  
Zhengyu Qu ◽  
Cuichun Li ◽  
Yong Hao ◽  
Feng Yan ◽  
Yanchu Yang
Keyword(s):  
High Altitude ◽  
System Design ◽  
Target Position ◽  
Aircraft Design ◽  
Flight Test ◽  
Roll Angle ◽  
Guidance System ◽  
Circuit Board ◽  
Wind Condition ◽  
Flight Tests

This paper presents the design details and flight tests validation of printed circuit board fabricated micro gliders. The purpose of the micro glider is to be launched from a super pressure balloon at high altitude, glide to the target position to collect data and upload data to the staying balloon. The mission demand requires the micro glider to finish precise landing with small size and low fabrication cost. To complete this concept, we designed a PCB fabricated aircraft with limited sensors including GPS and IMU. The first part of the article describes the aerodynamic design methods. The second part introduced the control and guidance system design by controlling the roll angle and flight path angle to complete the precise landing. In the simulation results presented in the third part, launch with no wind condition shows desirable precise landing ability. As a contrast, wind direction and magnitude have significant effects on the guidance ability and accuracy. In the last part, two real flight tests conducted in Inner Mongolia of China are described to compare the flight performance with the current aerodynamics and control system design. Returned data indicated the micro gliders could successfully fly at high altitude. The control algorithm can compute the command roll angle only with GPS and IMU, but some design details still need to be improved to achieve precise landing ability.

scholarly journals Design and Performance Evaluation of Propeller for Solar-Powered High-Altitude Long-Endurance Unmanned Aerial Vehicle

2018 ◽  
Vol 2018 ◽  
pp. 1-23 ◽  
Author(s):  
Donghun Park ◽  
Yunggyo Lee ◽  
Taehwan Cho ◽  
Cheolwan Kim
Keyword(s):  
Wind Tunnel ◽  
High Altitude ◽  
Test Data ◽  
Design Method ◽  
Wind Tunnel Test ◽  
Flight Test ◽  
Cfd Analysis ◽  
Aerial Vehicle ◽  
Solar Powered ◽  
Long Endurance

Design, wind tunnel test, computational fluid dynamics (CFD) analysis, and flight test data analysis are conducted for the propeller of EAV-3, which is a solar-powered high-altitude long-endurance unmanned aerial vehicle developed by Korea Aerospace Research Institute. The blade element momentum theory, in conjunction with minimum induced loss, is used as a basic design method. Airfoil data are obtained from CFD analysis, which takes into account the low Reynolds number effect. The response surface is evaluated for design variables by using design of experiment and kriging metamodel. The optimization is based on desirability function. A wind tunnel test is conducted on the designed propeller. Numerical analyses are performed by using a commercial CFD code, and results are compared with those obtained from the design code and wind tunnel test data. Flight test data are analyzed based on several approximations and assumptions. The propeller performance is in good agreement with the numerical and measurement data in terms of tendency and behavior. The comparison of data confirms that the design method, wind tunnel test, and CFD analysis used in this study are practically useful and valid for the development of a high-altitude propeller.

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