document

Experiences with two GPS SPS receivers in northern Europe

Pietersen, O.B.M. (author)

Results are given of measurements with two hand-held GPS C/A- code SPS (Standard Positioning Service) receivers at thirty locations in Finland, Norway and Sweden. Comparison is made between computed positions by the receivers and positions on geographic maps. It is concluded that both receivers have pros en cons. A combination of the...

report 1991

document

Hermes communications using data relay satellites. Part 3. Relative navigation using Navstar GPS during Hermes missions

Pietersen, O. (author)

NAVSTAR GPS will be the primary navigation aid for HERMES and it seems logical that also use will be made of this system for rendez-vous with the MTFF. If the MTFF is equiped with a NAVSTAR receiver, and transmits its position data to HERMES, these data can be used for proximity operations. Relative navigation can improve the performance...

report 1988

document

Hermes communications using data relay satellites. Part 2. Operational requirements on DRS links for Hermes

Slippens, C.P.R.C. (author), Pietersen, O.B.M. (author)

From the provided documentation an assessment of the requirements of the HERMES spaceplane and the performances of the European Data Relay Satellite System was performed. The information contained in these documents was not consistent. The conflict items identified are in the spread spectrum modulation, the bit error rate, the antenna parameters...

report 1988

document

Future satellite navigation systems: With emphasis on NAVSTAR GPS

Pietersen, O.B.M. (author)

In the near future NAVSTAR GPS will play a dominant role as a worldwide satellite navigation system. However, other systems, which are in the conceptual phase now, may be cheaper, and more acceptable to the civil user community. In this report the principles are described of NAVSTAR GPS, GLONASS, NAVSAT and GRANAS.

report 1987

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Recommendations for the concept of a global civil satellite navigation system; based on comparison of NAVSAT and GRANAS

Ambrosius, B. (author), Bosgra, J.A. (author), van Driel, N. (author), Joosten, L.J.M. (author), Klinker, F. (author), Monkel, A. (author), Pietersen, O.B.M. (author), Slippens, C. (author)

In order to come to a unified concept for the future civil satellite navigation system, it was studied which characteristics of the two major proposed concepts, NAVSAT and GRANAS, would be preferred for such a system. This investigation encompassed the preferred orbit configuration, the satellite position determination principle and the...

report 1987

document

Study of NAVSAT control segment characteristics: part I: elements of a control segment concept

Joosten, L.J.M. (author), de Pagter, P.J. (author), Pietersen, O.B.M. (author), Renes, J.J. (author), Roefs, H.F.A. (author)

report 1984

document

Methoden voor het genereren van stoorsignalen bij susceptibiliteitsmetingen

Pietersen, O.B.M. (author)

report 1984

document

Simulation of the performance of adaptively controlled Navstar antennas in Battlefield scenarios

Pietersen, O.B.M. (author), Klinker, F. (author)

The Navstar Global Positioning System, GPS. is a navigation system developed by the US Department of Defense. Its main purpose is to provide highly accurate positioning and timing data to military users. Although the use of the spread spectrum technique in GPS provides for a reasonable protection against jamming or other interference signals,...

report 1984

document

Automatisch nul-surende antennesystemen voor Navstar/GPS

Pietersen, O.B.M. (author)

A survey is given of null-steering antenna systems which likely will be implemented as part of the user equipment in the Navstar Global Positioning System. These antennas are able to adapt their pattern automatically to a scenario with jammers. They provide for attenuation of jamming signals while trying to continue the reception of the spread...

report 1984

document

Theoretical and computational aspects of adaptively controlled Navstar antennas

Pietersen, O.B.M. (author), Klinker, F. (author), Roefs, H.F.A. (author), Lucas, A.M.G.M. (author)

report 1984

document

Electromagnetic compatibility in aerospace vehicles

Pietersen, O.B.M. (author)

report 1983

document

Analysis of possible interference in radio altimeters induced by a position marker system called RASP

Pietersen, O.B.M. (author), Klinker, F. (author)

An analysis is given of possible interference induced by a position marker system, called RASP, into aircraft radio altimeters. The RASP system is used as a marker beacon in flight tests for trajectory measurements, and operates on 4.3 GHz. It is concluded that radio altimeters will not experience any harmful interference from a RASP transmitter.

report 1981

document

Computer aided EMC analysis: A review of available tools

Pietersen, O.B.M. (author)

A review is given of methods for the analysis of intrasystem electromagnetic compatibility. Emphasis is placed on pocket calculator programs and on the SEMCAP computer program. Taking into account the applications at NLR, we conclude that both tools can be very useful for such an analysis. As far as antenna-to-antenna coupling is considered, the...

report 1977

document

Determination of antenna radiation patterns, radar cross sections and jam-to-signal ratios by flight tests

Pietersen, O.B.M. (author), Alders, G.J. (author), Wasch, R.B.A. (author)

This paper contains information on a data acquisition and processing method, aimed at the determination of radiation patterns of airborne equipment. It describes the data acquisition procedure and, more specific, the data processing and presentation schemes used. Paper presented at the Symposium on Flight Test Techniques of the AGARD Flight...

report 1976

document

Some aspects of interference immunity of the proposed microwave landing systems

Pietersen, O.B.M. (author), Klinker, F. (author)

Por C-band MLS systems it is analyzed which regular transmitters may disturb the proper functioning. The assumptions and estimations, which have led to the detection of the culprit systems, are described. In addition, the signal characteristics of transmitters which may render the DMLS, TRSB and DLS system inoperative are analyzed. This analysis...

report 1976

document

A slotted waveguide antenna as a marker beacon for aircraft

Pietersen, O.B.M. (author), Klinker, F. (author)

This paper presents a description of a position marker system used in aircraft certification flights. The system consists of a ground-based part, viz. a microwave transmitter and a fan-beam antenna, while the airborne part is composed of receiving antenna, a crystal-video receiver and a processor which interfaces the system to the usual...

report 1975

document

Application of microwave techniques to the measurement of the position of a fast moving piston in a barrel

Pietersen, O.B.M. (author), Klinker, F. (author)

A system is described for the measurement of the position of a very fast moving dural piston in a steel barrel using microwave techniques. The barrel behaves as a cavity resonator of variable dimension due to the piston movement. Because a cavity absorbs power under resonance conditions, it is possible to determine the displacement of the piston...

report 1974

document

A linear array of blade antennas as an aircraft antenna for satellite communication

Klinker, F. (author), Pietersen, O.B.M. (author), Vreeburg, J.P.B. (author)

In a ground-satellite-aircraft communication system the aircraft antenna is a critical part since it has to meet the typical environmental requirements and possess a rather high gain. This paper describes a suitable antenna system, installed on a Fokker Friendship aircraft. It consists of a linear array of blade antennas, a power division and...

report 1973

document

ELDO-PAS: ELDO-PAS orbit determination program: Part III: Computational details and sensitivity results

de Jong, J.L. (author), van Ingen Schenau, H.A. (author), Pietersen, O.B.M. (author)

report 1969

document

ELDO-PAS: ELDO-PAS orbit determination program: Part II: Computer program

de Jong, J.L. (author), van Ingen Schenau, H.A. (author), Pietersen, O.B.M. (author), Doekes, G. (author), van Eek, G.M. (author)

report 1969