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1.
记者:请您介绍一下罗克韦尔·柯林斯公司在ARJ21-700项目中的参与情况。
丹尼·海格森:作为ARJ21-700项目的19家供应商之一,我们负责为ARJ21-700飞机提供一整套的航电设备,其中涵盖了通信、导航、飞控以及监视各个子系统。 相似文献
2.
Approximate equations are developed for converting geodetic coordinates to a local north-east-down (NED) Cartesian coordinate system, and it is shown that good accuracy can be obtained if the ellipsoidal shape of the Earth is taken into account. 相似文献
3.
R.A. Gowen A. Smith A.D. Fortes S. Barber P. Brown P. Church G. Collinson A.J. Coates G. Collins I.A. Crawford V. Dehant J. Chela-Flores A.D. Griffiths P.M. Grindrod L.I. Gurvits A. Hagermann H. Hussmann R. Jaumann A.P. Jones K.H. Joy O. Karatekin K. Miljkovic E. Palomba W.T. Pike O. Prieto-Ballesteros F. Raulin M.A. Sephton S. Sheridan M. Sims M.C. Storrie-Lombardi R. Ambrosi J. Fielding G. Fraser Y. Gao G.H. Jones G. Kargl W.J. Karl A. Macagnano A. Mukherjee J.P. Muller A. Phipps D. Pullan L. Richter F. Sohl J. Snape J. Sykes N. Wells 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2011
4.
Jack M.A. Grant P.M. Collins J.H. 《IEEE transactions on aerospace and electronic systems》1977,(6):610-619
A prototype real time cepstrum analyzer incorporating surface acoustic wave (SAW), Fourier transform processors is reported. This system offers sophisticated wideband signal processing for radar, sonar, and communications applications. Practical results demonstrate its capabilities when analyzing bandwidths in excess of 10 MHz in a few microseconds with simulated pulsed RF waveforms in the presence of multipath echoes. Pulse duration, repetition interval, and binary code length are resolved and the potential to characterize unknown chirp waveforms is briefly reported. 相似文献
5.
Torrione P.A. Throckmorton C.S. Collins L.M. 《IEEE transactions on aerospace and electronic systems》2006,42(2):644-658
A two-stage algorithm for landmine detection with a ground penetrating radar (GPR) system is described. First, 3-D data sets are processed using a computationally inexpensive pre-screening algorithm which flags potential locations of interest. These flagged locations are then passed to a feature-based processor which further discriminates target-like anomalies from naturally occurring clutter. Current field trial (over 6500 square meters) and blind test results (over 39000 square meters) are presented and these show at least an order of magnitude improvement over other radar system-based detection algorithms on the same test lanes. 相似文献
6.
A Sample Caching Subsystem (SCS) concept that provides transfer and storage of core and soil samples for planetary missions has been developed. The SCS could be carried on a rover and a rover arm-mounted coring tool could acquire samples and deposit the samples in the SCS. The SCS would transfer the samples into a sample container, with each sample in a separate sleeve. Important to the SCS design is the ability to seal each sleeve, and the sample with it, to isolate it from other samples and from the external environment. Sealing of the samples will allow for maintaining the integrity of organic materials over many years thereby allowing the samples to be analyzed in later missions or after a return trip to Earth. 相似文献
7.
A variety of valuable roles can be foreseen during the next two decades for a reusable, piloted launch vehicle with a small payload. The authors argue that unfortunately, as currently proposed, the Hermes-Ariane 5 vehicle will not be able to fill the roles required. The authors propose a reusable aerospace transporter-a variant of Hermes - which will provide a solution and allow Europe to take the lead in developing the first fully reusable launch vehicle. 相似文献
8.
Best P.S. Collins D.J. Piccione D. Ferrett D. 《Aerospace and Electronic Systems Magazine, IEEE》1999,14(4):5-8
The PM N-V/RSTA is procuring the Driver's Vision Enhancer (DVE) thermal imaging system for use in combat and tactical wheeled vehicles. The DVE uses uncooled forward looking infrared technology compared to the I2 technology currently in the field. During the development of the DVE several issues were raised regarding how specific aspects of system design were related to driver performance. As a result, DCS Corporation developed a data collection effort to provide the DVE project leader with needed performance data that could act as a foundation for making program decisions 相似文献
9.
A. Chandran R.L. Collins V.L. Harvey 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2014
In this review article we summarize recent results in the coupling of the stratosphere–mesosphere during stratospheric sudden warming (SSW) events. We focus on the role of planetary and gravity waves in driving the middle atmosphere circulation and illustrate the stratosphere–mesosphere coupling during undisturbed wintertime circulation, during an SSW event, and after an SSW event during the formation of an elevated stratopause using simulations of past Arctic and Antarctic winters from the Specified Dynamics version of the Whole Atmosphere Community Climate Model (SD-WACCM). We illustrate the transition of the polar stratopause from being a gravity wave driven phenomena to a planetary wave driven phenomena during SSW events and its subsequent reestablishment and control by gravity waves. We also examine the synoptic structure of the stratosphere, mesosphere, and lower thermosphere using SD-WACCM data fields that show the structure of the vortex during specific dynamical events in both hemispheres. We illustrate the longitudinal asymmetry in the thermal structure in the stratosphere and mesosphere driven by differences in circulation over the polar cap regions during an SSW event. We complement this analysis of the middle atmosphere circulation with a classification of both the Arctic and Antarctic winters since 1979 into major, minor, elevated stratopause or quiet winters based on the level of disturbance using the Modern Era-Retrospective Analysis for Research and Applications (MERRA) reanalysis data. From the MERRA data we find that the combined occurrences of both major and minor warmings in the Arctic have remained constant over the past three decades while we find a minor increase in their occurrences in the Antarctic. 相似文献
10.
Collins T. J. Crosier W. G. Paloski W. H. 《Aerospace and Electronic Systems Magazine, IEEE》1987,2(8):9-12
An IBM-PC compatible interface card has been developed to combine computer generated digital data with analog video in real-time. The I/O mapped, memory-mapped board can multiplex the digital data anywhere in the active field of an RS170 video signal. The interface can be used when there is a need to combine video and digital data. 相似文献