SCIENTIFIC AND TECHNICAL AEROSPACE REPORTS

A Biweekly Publication of the National Aeronautics and Space Administration
VOLUME 44, ISSUE 9 - MAY 5, 2006

32 COMMUNICATIONS AND RADAR
Includes radar; radio, wire, and optical communications; land and global communications; communications theory.

For related information see also 04 Aircraft Communications and Navigation; and 17 Space Communications, Spacecraft Communications, Command and Tracking; for search and rescue, see 03 Air Transportation and Safety; and 16 Space Transportation and Safety

20060011246 Swedish Defence Research Establishment, Linkoeping, Sweden

Intrusion Detection System and Response for Mobile ad hoc Networks (Intrangsdetektering och Svar foer Mobila ad Hoc Naetverk)

Nordqvist, D.; Westerdahl, L.; Hansson, A.; Jul. 2005; 38 pp.; In English Report No.(s): PB2006-101691; FOI-R-1683-SE; No Copyright; Avail.: CASI: A03, Hardcopy

The research area of mobile ad hoc intrusion detection systems (IDS) is still under development. Existing IDS'es are mainly for wired or wireless networks. In a previous report it was concluded that existing products for wireless IDS'es are not suitable for tactical mobile ad hoc networks. The IDS architecture of the tested tools neither has support for the autonomous and self-organized property nor the ability needed for detecting relevant attacks. In this report an architecture for a mobile ad hoc network IDS is presented. The IDS is based on requirements from a general perspective, some special requirements for the ad hoc environment and finally military requirements. The result is a network IDS located on each node within the network. NTIS

Detection; Warning Systems; Autonomy

20060011261 Coast Guard, Washington, DC USA

Aids to Navigation Manual: Structures

Nov. 2005; 152 pp.; In English Report No.(s): PB2006-108267; COMDTINST-M16500.25A; No Copyright; Avail.: National Technical Information Service (NTIS)

1. PURPOSE. This Manual establishes policies, procedures, and criteria for the design and inspection of Short Range Aids to Navigation (ATON) structures.

2. ACTION. Area and district commanders, commanders of maintenance and logistics commands, and commanding officers of headquarters units shall ensure that the provisions of this Manual are followed. Recommendations for changes to this Manual should be directed to Commandant (CG-432).

3. DIRECTIVES AFFECTED. The Aids to Navigation Manual - Structures, COMDTINST M16500.25, is canceled.

4. DISCUSSION. This revision of Aids to Navigation Manual - Structures, COMDTINST M16500.25 reflects the constructive comments that have been provided by the field since the Manual was first published in September 2004. The primary changes are in Chapter 2 (requirements for platforms, guardrails, ladders, and fall arrest systems) and Chapter 4 (requirements for fall protection and operational risk management). Several of the data sheets have also been revised to more clearly reflect the guidance in the Manual.

5. ENVIRONMENTAL ASPECT and IMPACT CONSIDERATIONS. Environmental considerations were examined in developingthis Manual and are incorporated herein.

6. FORMS/REPORTS. Form CG-4094,Shore Station Maintenance Record, and Form CG-6042, ATON Structure Inspection Form, are available in USCG Electronic Forms on Standard Workstation III, and on the Internet at \hhttp://www.uscg. mil/ccs/cit/cim/ forms1/welcome.htm\g NTIS

Navigation Aids; Shoran

20060011477 Rome Univ., Rome, Italy

Aspects of Digital Signal Processing in Radiometric Remote Sensing of Geophysical Variables

Ciotti, Piero; Solimini, Domenico; International Conference on Acoustics, Speech and Signal Processing (ICASSP '82); Volume 3; [1982], pp. 1874-1877; In English; See also 20060011369; Copyright; Avail.: Other Sources

When geophysical variables are estimated from remotely sensed electromagnetic data, severe difficulties are often encountered because of the ill-posed nature of the problem, so that the use of effective processing becomes essential. The inversion of radiometric data in the retrieval of atmospheric temperature profiles is considered and the use of the Kalman filter algorithm is analyzer to assess its performance from the point of view of accuracy of estimates end spatial resolution. The sensitivity to experimental errors is pointed out and the use of adaptive filtering to reduce the inaccuracy of data is examined. With regard to spectra of radiometric fluctuations, the performance of recently proposed spectral estimation techniques, amenable to the originally proposed maximum entropy method, are considered. The estimate of line parameters to identify and follow the temporal evolution of atmospheric internal oscillations is discussed, as well as the accuracy of retrieval of the slopes of radiometric turbulent spectra. Author

Geophysics; Radiometers; Remote Sensing; Signal Processing; Digital Systems

20060011594 GVM Consulting, Germany

Telemetry Band Augmentation: An Agenda Item at the Next World Radio Communication Council

Mayer, Gerhard K. L.; Lyons, Steve W.; Chalfant, timothy A.; Flight Test: Sharing Knowledge and Experience; May 2005, pp. 6-1 - 6-9; In English; See also 20060011579; Original contains color and black and white illustrations; Copyright; Avail.: CASI: A02, Hardcopy; Available from CASI on CD-ROM only as part of the entire parent document

One of the significant factors affecting combined operations is the planning, scheduling, and utilisation of telemetry and telecommand spectrum to support next generation platform development and to support operational tests conducted in combined environments (air, land, sea and space). Due to commercial spectrum encroachment and the resultant reallocation legislation, the increasing (flight test) need for real-time data display and analysis is quickly becoming unsupportable in the existing bands.

Several research efforts have increased telemetry efficiency by decreasing the amount of spectrum needed to transmit information. These techniques, promising a two to three fold increase, still can't address the need for future wide-band telemetry, which is growing exponentially. This has generated a call to look for additional radio frequency spectrum allocations to augment the existing telemetry bands. This need is shared by the international community and has generated an agenda item for the next meeting of the World Radio-communication Conference (WRC). Due to the international impact of spectrum encroachment on telemetry users, the International Foundation for Telemetering established an information interchange forum, called the International Consortium for Telemetry Spectrum (ICTS), to support this critical requirement. It is necessary that all telemetry users support a positive response to this WRC agenda item to meet the needs of future test programmes. Author

Telemetry; Radio Communication; Radio Frequencies; Command and Control; Real Time Operation; Flight Tests

20060012030 Connecticut Univ., Hartford, CT, USA

Telehealth Support in Cardiovascular Disease

LaCoursiere, S.; Chinn, P. L.; Polifroni, C.; Neafsey, P.; Burns, K.; Sep. 2003; 20 pp.; In English Contract(s)/Grant(s): 1R03HS1193701 Report No.(s): PB2006-107544; No Copyright; Avail.: CASI: A03, Hardcopy

The purpose of this research was to determine if the availability of web-based telehealth nurse support had an effect on psychological and physiological outcomes, support, satisfaction, usage, and communication in persons with cardiovascular (CV) disease who use the Internet. NTIS

Cardiovascular System; Heart Diseases; Support Systems; Telemedicine

Source: NASA