Results 101 to 110 of about 45,125 (224)

Photonics-Based Multifunction System for Radar Signal Transmit-Receive Processing and Frequency Measurement

Micromachines
A novel photonic-assisted multifunctional radar system was proposed and experimentally investigated. This system can simultaneously achieve frequency-doubled linear frequency modulation (LFM) signal generation, de-chirp reception, self-interference ...
Dengcai Yang, Ya Zhang, Feng Yang, Mei Yang, Yinhua Cao   +4 more
doaj   +1 more source

Atmospheric measurements over kwajalein using falling spheres [PDF]

Atmosphere measurements using falling spheres tracked by ...
Bonfanti, G., Hansen, W. H., Mc Watters, K. D., Peterson, J. W.   +3 more
core   +1 more source

Evaluating the Effectiveness of High-Frequency Ground-Penetrating Radar in Identifying Active Layer Thickness in the Da Xing’anling Mountains

Remote Sensing
Ground-penetrating radar (GPR), due to its efficiency and non-invasive nature, has become an important tool for detecting the permafrost table, overcoming the limited spatial coverage and high costs associated with drilling and in situ temperature ...
Lei Yang, Yunhu Shang, Changlei Dai, Yang Liu, Guoyu Li, Kai Gao, Yi Wu, Yiru Wei   +7 more
doaj   +1 more source

Low cost tracking Navaids error model verification [PDF]

Features and characteristics of the tracking navaids (Microwave Scanning Beam Landing System, Radar Altimeter, Tacan, rendezvous radar and one way Doppler extracter) were investigated.
Charych, A., Frederick, R., Lovell, J., Tatz, A.   +3 more
core   +1 more source

Rotor systems research aircraft airplane configuration flight-test results [PDF]

The rotor systems research aircraft (RSRA) has undergone ground and flight tests, primarily as a compound aircraft. The purpose was to train pilots and to check out and develop the design flight envelope.
Erickson, R. E., Painter, W. D.
core   +1 more source

OMV mission simulator [PDF]

The Orbital Maneuvering Vehicle (OMV) will be remotely piloted during rendezvous, docking, or proximity operations with target spacecraft from a ground control console (GCC).
Cok, Keith E.
core   +1 more source

An Extended Polar Format Algorithm for Joint Envelope and Phase Error Correction in Widefield Staring SAR with Maneuvering Trajectory

Remote Sensing
Polar format algorithm (PFA) is a widely used high-resolution SAR imaging algorithm that can be implemented in advanced widefield staring synthetic aperture radar (WFS-SAR). However, existing algorithms have limited analysis in wavefront curvature error (
Yujie Liang, Yi Liang, Xiaoge Wang, Junhui Li, Mengdao Xing   +4 more
doaj   +1 more source

Statistical analysis of a planetary radar altimeter measuring unit [PDF]

Statistical analysis of altitude measuring unit of lightweight continuous wave radar ...
Powell, W. R., Stanley, W. D.
core   +1 more source

NASA-FAA helicopter Microwave Landing System curved path flight test [PDF]

An ongoing series of joint NASA/FAA helicopter Microwave Landing System (MLS) flight tests was conducted at Ames Research Center. This paper deals with tests done from the spring through the fall of 1983.
Hamlin, J. R., Swenson, H. N., Wilson, G. W.   +2 more
core   +1 more source

Simulation evaluation of display/FLIR concepts for low-altitude, terrain-following helicopter operations [PDF]

A piloted simulation of three head-down display (HDD) concepts with flight-director guidance superimposed on forward-looking infrared (FLIR) imagery was performed to evaluate the task of low-level, terrain-following (TF), manual helicopter flight.
Kilmer, F. G., Kilmer, R. L., Paulk, C. H., Jr., Swenson, H. N.   +3 more
core   +1 more source