ICTS Technical Report

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Subject 1

MITRE Draft Report (see attachment : "Working Group Paper Outline") NL n° 1
At the October Working Group Meeting, MITRE took an action to prepare an outline draft of a report on issues associated with augmentation of telemetry spectrum in the 3-30 GHz range. Attached is an initial draft of an outline of that paper which is being circulated to the Working Group for review and comment. Please send comments to me as soon as possible.
I understand that other members of the Working Group were planning to provide additional material for incorporation in this paper. I would appreciate it if such additional material could be provided to me, discussed with me, or circulated among the Working Group as soon as it can be done. de/from : David Portigal 15/02/02
Contact : dportiga@mitre.org
 

Letters to the Editor

  • Comment to section 6.b of the Working Group Paper Outline NL n° 1

The space agencies of Europe have retained the advanced modulation techniques GMSK and SOQPSK for the high rate telemetry of their spacecraft. The ECSS standard E50-05 has been finalised and is in the process of final review.
The CCSDS worldwide space agencies are going in the same direction; several of them are currently working at the development of the necessary hardware to implement GMSK and SOQPSK. There is to my knowledge no agency currently planning to implement FQPSK.

Contributor: Jean-Luc GERNER (ESA) 25/02/02 jgerner@estec.esa.nl
  • Comment to section 6a of the Working Group. Paper Outline NL n° 2
"On the working group paper outline section 6 a, are we missing to include Multi-h CPM in our investigation of use of advanced modulation and multiplexing techniques, which the ARTM Lab at Edwards AFB is looking at ?"
 
Contributor : Bernd Uwe Wiese (BWB) 13/03/02 bernd.wiese@bwb.org
  • ITEA 6th Annual Instrumentation Workshop, 30 April '02 NL n° 7

Challenge: most of T & E support is provided by 4 bands

  • 1 TPSI / target contol band
  • 1 unmanned vehicle telemetry band
  • 2 aeronautical telemetry band

With 3-30 Ghz augmentation : IUT WP8b surveying needs

Contributor:
Tim CHALFANT: Edwards Air Force Base tim.chalfant@edwards.af.mil
Saul ORTIGOZA/Edwards Air Force Base saul.ortigoza@edwards.af.mil

  • Telemetry Spectrum Augmentation, May 2002 NL n° 7

US response to ITU-R WP 8B Circular letter CA : 109

  • 300MHz contiguous
  • Specific bands cannot be identified at this time. However, based on infrastructure and technical characteristics bands below 6 GHz should be given priority considerationBy utilising a mobile primary allocation with no restriction against aeronautical mobile, no special technical and operational caracteristic are required

Coordinator: Darrell ERNST Mitre dernst@mitre.org

Subject 2

  • Launch Vehicle Telemetering Safety Request NL n° 3

In pursuing the intersecting telemetry spectrum interests between Defence and the civil space community, the Australian Federal Office that is responsible for launch safety has posed a question about the spectrum necessary to support launch vehicle safety. This, by necessity, should embrace command/destruct/flight termination, as well as launch vehicle telemetry behavioural monitoring and/or telecommand/control. I'm not sure who works the link error margins to satisfy the safety requirements but some points of contact would be useful to get the ball rolling on this topic. Note that the inquiry relates to launch vehicle support and NOT to any operational TT&C or telemetry data-links that are associated with satellites or platforms once launched in space.

Contributor : Vivian Crouch, ICTS Chair & Coordinator ICTS Region 3 - Asia/Pacific (28/03/02) vivian.crouch@dsto.defence.gov.au

Letters to the Editor

For example, Jean ISNARD (SEE) jisnard-isti@club-internet.fr quotes UHF bands for launch vehicle range safety command NL n° 3 "launch vehicle range safety command destruct receivers in the 449.75-450.25 MHz band (extract from RR §5.286) as well as around 421.0, 425.0, 427.0, 440.0 and 445.0 MHz in the USA and, in the French Overseas Departments in Region 2, the 433.75-434.25 MHz band (extract from RR §5.281)".

Subject 3

  • Usage of the 4.4-4.99 GHz (in 4 bands 4.4-4.5, 4.5-4.8, 4.8-4.94 & 4.94-4.99) inside USA (1 attachment) and frequency table (1 attachment) NL n° 3
  • Usage of the14.7145-15.1365 GHz Band inside USA frequency table (1attachments) NL n° 3
Contributor: Mikel R. Ryan ICTS Region II Co-ordinator ryanmr@navair.navy.mil
  • US Hybrid C-band Telemetry Proof of Concept (HCBT) May 2002 NL n° 7
    • L-Band / S-Band signal is used for tracking
    • L-Band / S-Band signal may or may not be modulated, depending on capacity requirements
    • Single ground antenna used to receive both signals
WRC 07 agenda item 2.12 propose wide band telemetry in the 3-30 GHz region, with an ICTS members proposal of an band allocation below 10 MHz International band for mobile communication exist bet-wen 4.4 and 4.94 GHz (NL n° 3)

Contributor : Darrell ERNST MITRE dernst@mitre.org

Subject 4

  • UK Radio Spectrum Management Report (attachment : 2) NL n° 4

Steve Lyons from QinetiQ Aberporth (ex-DERA) has sent us the recent report (see pdf attachment) on UK spectrum prepared by consultants for the UK DTI / Treasury. This report, along with other UK spectrum management documentation, is available from the DTI's Radiocommunications Agency which sponsors a useful web site : www.radio.gov.uk and also hold road shows to communicate plans and seek comments etc. The RA is now part of OFCOM, a newly created government body.

Contributor : Steve Lyons, QinetiQ Aberporth (& UK Region I Coordinator) swlyons@qinetiq.com (02/05/02)

  • Strategy for the future use of the radio spectrum in the UK (attachment 1) NL n° 11
In 8 chapters concerning:
  • Radio-communications
  • Military spectrum strategy
  • Aeronautical strategy
  • Maritime spectrum strategy
Including spectrum management mechanisms, the authorisation of spectrum use and research

Subjet 5

  • Frequency Band Sharing : Utopia or Reality? (see attachment : Beijingisnard.doc) NL n° 5

Jean ISNARD (SEE, France) has sent us the attached revised version of a paper he presented at the 2001 CIE International Conference on Radar held in Beijing PRC, 15-18 October 2001

This article appears with the IEEE's permission and is due to be published in a future issue of the IEEE's "AES Magazine"

Contributor : Jean ISNARD jisnard-isti@club-internet.fr

Letter to the editor NL n° 6

§ 3.2: The moving to the band 2.9-3.1 GHz is actually irrelevant In the low part of band 2.7-2.9 GHz, partition capacity with aeronautical test telemetry frequency has already be found
§ 3.3 It is not quite conceivable to exclude radar from this band
 
Contributor : bmnf@dga.defense.gouv.fr
  • An alternative Spectrum Management Strategy by Pierre FUERXER NL n° 8

The present spectrum management techniques are reaching their LIMITS. To cope with that request for more and more frequency allocations, it will be necessary to adopt new spectrum management methods.
This paper present the more promising ways to improve the global spectrum management techniques availability:

  • Improvement of signals technical parameters
  • Better evaluation of unintentional interference
  • More realistic interference scenarios
  • Precise estimation of users needs,...
Later, the paper show how new spectrum management techniques are internally used by the more recently introduced systems with the possibility of an extension to different systems sharing the same frequency band.

Contributor: pierre.fuerxer@wanadoo.fr

  • Evaluation Methods for Spectrum Management Strategies by Pierre FUERXER NL n° 10 Special Edition
Today, simulation seems the only available evaluation method. However, in many random scenarios used for electromagnetic compatibility evaluation, analytical computation produces better results than simulation.
This paper presents the relative merit of these two methods for various types of evaluation scenarios:
  • analytical computation is better for random scenarios,
  • simulation is mandatory for deterministic scenarios,
  • the combination of the two methods is recommended for partially random scenarios.
Contributor: pierre.fuerxer@wanadoo.fr

Subjet 6

  • SEXTANT2 - Susceptibility of Electronic systems To Atmospheric Neutrons from Test to Technology NL n° 9

The SEXTANT2 Working Group addresses the key problem of the sensibility of electronic components and systems to the adverse effects due to the interaction of atmospheric neutrons with devices , effects that are bound to become more and more important considering the roadmap of electronic systems. Atmospherics neutrons are end-products of the interactions of cosmic rays with our atmosphere. Each new CMOS generation allows more performing devices which are roughly 5 times more sensitive to soft errors rate, main effect of atmospheric neutrons, more dense at jet flying altitude.
The objectives are to aim at improving by several orders of magnitude the robustness of present and future electronics technologies to this effect, now and up to the 2010 horizon
The proposed approach is made for 3 themes:

  • Simulation and Testing (S &T)
  • Component level (CO)
  • Systems and Products (S & P)