Submission of Space Graphical Data Attila Matas BR SSDSPR Regional Radiocommunication Seminar Jejudo

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Submission of Space Graphical DataAttila Matas
BR SSD/SPRRegional Radiocommunication
Seminar(Jeju-do, Republic of Korea , 17 21
November 2003)
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Submission of Space Graphical Data

•    
• Introduction
• How to prepare graphical data?
• Most frequent errors
• How to submit filing to the Bureau ?

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Submission of Space Graphical Data

• Introduction 
• Appendix 4 to the Radio Regulations stipulate
  that the following data shall be notified, as
  appropriate, in a graphical form
• the measured radiation diagrams of earth station
  antennas
• the horizon elevation diagrams of earth stations
• the service areas of satellite networks
• the antenna gain contours of geostationary space
  stations
• the diagram of the antenna gain of geostationary
  space stations towards the geostationary-satellite
  orbit and
• the antenna radiation pattern of space stations.

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Submission of Space Graphical Data

• Basic reference information
• BR Circular Letter CR58 Notification of frequency
  assignments to stations in the space
  radiocommunications services on electronic media
• RES55 WRC-2000 in its resolves 6
• that, as from 3 June 2000, all graphical data
  associated with the submissions addressed in
  resolves 5 should be submitted in graphics data
  format which is compatible with the Bureau's data
  capture software (graphical interference
  management system (GIMS)) submission of graphics
  in paper form will, however, continue to be
  accepted

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Submission of Space Graphical Data

• How to prepare graphical data?
• Graphical data in paper form (80 of data
  filing)
• Electronic graphic data (GIMS format)
• You can find more information about electronic
  capture in the presentation of Mr. Olivier Evrard
  Diagram Capture and Electronic Notification with
  GIMS

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Submission of Space Graphical Data

• In general the GIMS permits direct recognition of
  the projection and digitizing of service areas
  and space station antenna gain contours presented
  on a map in the following most common
  projections
• orthomorphic (full or partial satellite view)
• cylindrical equidistant (plate carrée)
• Mercator
• cylindrical equal area (Lambert) and
  exceptionally
• equidistant conical with one standard parallel
  (Ptolemy) this projection is suitable only for
  the Northern Hemisphere.

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Submission of Space Graphical Data

• In order to ensure adequate recognition of a map
  in any projection it is necessary to present it
  with at least six lines of latitude and six lines
  of longitude forming the geographical
  longitude/latitude graticule, appropriately
  labelled
• Diagrams where the geographical
  longitude/latitude graticule is replaced by
  another coordinate reference system, such as the
  azimuth/elevation angles referred to the
  sub-satellite point, are not acceptable.

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Submission of Space Graphical Data

• Diagrams should, wherever possible, be submitted
  in
• A4 format (210 x 297 mm) for ease of
  digitization, as long as this does not entail
  undue distortion by copying.
• Diagrams larger than A3 format will be too big
  for the digitizing tablet used.
• In addition, whenever possible, contours should
  be represented as continuous lines.
• For antenna gain contours there should be a clear
  indication of their respective gain values
  relative to the maximum gain.

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Submission of Space Graphical Data

• Diagrams in the full or partial satellite view
  should be presented
• as the radial projection from the satellite at
  its nominal geographical longitude on the
  geostationary-satellite orbit on to a plane
  perpendicular to the axis from the center of the
  Earth to the satellite.
• The geographical graticule should be drawn for
  the above condition as it appears from the
  geostationary satellite.
• When the area of interest covers only a part of
  the Earths surface, as in the case of a spot
  beam, a partial satellite view which covers not
  much more than the area containing the 20 dB
  antenna gain contour(s) is preferable, in order
  to increase the size of the diagram for easier
  interpretation

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Submission of Space Graphical Data

• 1. Space station antenna gain contours and
  boresights
• In the case of a space station aboard a
  geostationary satellite, the space station
  antenna gain contours shall be plotted on a map
  of the Earths surface as isolines of the
  isotropic gain at least for 2, -4, -6, -10 and
  20 dB and at 10 dB intervals thereafter, as
  necessary, relative to the maximum antenna gain,
  when any of these contours is located either
  totally or partially anywhere within the limit of
  visibility of the Earth from the given
  geostationary satellite.
• Contours beyond the limit of visibility cannot be
  digitized, and in cases where the 20 dB contour
  has not yet been reached (e.g. for antennas with
  global coverage) a contour at the limit of
  visibility together with its relative gain should
  be given.

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Submission of Space Graphical Data

• 2. Space station antenna gain contours and
  boresights
• In the process of carrying out (delta T) /T and
  C/I calculations using the space station antenna
  gain contours, the system performs an automatic
  interpolation of the gain for points between the
  contours in reference to the boresights, which
  are not required in the said Appendices.
• Administrations are requested to present the
  diagrams with the boresights and their associated
  antenna gains.
• The antenna gain, at least at one boresight,
  should correspond to the maximum isotropic gain.
• If the gain at other boresights is lower than the
  maximum gain, the gain at these boresights should
  be indicated in reference to the maximum antenna
  gain in the same way as for the contours.

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Submission of Space Graphical Data

• 3. Service areas
• The requirements for digitizing service areas are
  the same as for antenna gain contours.
• In the case of a service area being defined only
  by the name of a country or series of countries,
  the service area is recalled from the IDWM.
• A service area defined by discrete points such as
  locations of given earth stations or test points
  (with, in either case, their geographical
  coordinates) is processed either by the direct
  entry of the numerical values or by digitizing
  the geographical positions.
• When the service area does not fall into either
  of these two categories it is to be provided as a
  closed contour or contours on a recognizable map.
  

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Submission of Space Graphical Data

• 4. Diagram of antenna radiation towards the
  geostationary-satellite orbit (GSO)
• Appendix 4 to the Radio Regulations stipulate
  indication (when appropriate) of the gain of a
  space station antenna in the direction of those
  parts of the geostationary-satellite orbit which
  are not obstructed by the Earth, by means of a
  diagram showing estimated antenna gain versus
  orbit longitude.
• This information should be presented as an
  orthogonal x-y diagram, where the orbit longitude
  is shown on the x-axis with the length of 360
  degrees and the antenna gain, in dB, on the
  y-axis. Both axes should be regular and linear,
  and in neither case should the axis be
  foreshortened

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Submission of Space Graphical Data

• 4. Diagram of antenna radiation towards the
  geostationary-satellite orbit (GSO)
• In the process of digitizing the gain versus
  orbit longitude, the system performs an automatic
  validation for the longitudinal zone
  corresponding to the part of the orbit obstructed
  by the Earth and blocks any data entry within
  this segment. Therefore, it is essential to
  obtain the respective diagrams with an adequate
  accuracy in marking the obstructed zone.
• The limits of the obstructed longitudinal zone
  are located ? 162.6 degrees from the
  nominal orbital position of the space station.
• The provision of the two values of antenna gain
  for the points where the gain curve intersects
  the limits of the obstructed zone is recommended.
  
• The gain values at the two extremes of the x-axis
  on the diagram should be identical.

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Most frequent errors in submission of Space
Graphical Data

• Graphical data errors
• service area diagram does not have a closed
  contour
• contours are not extended to the horizon
• closest contours are not visibly separated by at
  least 1 mm
• high distortion of the diagrams
• undefined and invisible boresights.
• Regulatory errors
• regional service area restrictions
• GSO diagrams are not provided for the
  bi-directional bands.

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Most frequent errors in submission of Space
Graphical Data
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Most frequent errors in submission of Space
Graphical Data
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Most frequent errors in submission of Space
Graphical Data

• Sample of incorrect beam EU1
• missing boresight
• unclear gain contours
• references
• closest contours are
• not visibly separated
• incorrect map projection.

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Most frequent errors in submission of Space
Graphical Data

• Corrected beam EU1
• Final beam EU1 created by the GIMS

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Most frequent errors in submission of Space
Graphical Data

• 
  Beams E1R and E4R

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Most frequent errors in submission of Graphical
Data

• STEERABLE Beams
• Item B.3 b) 2) of AP 4 requires that the maximum
  antenna gain and the effective antenna gain
  contours be provided in the case of steerable
  beams, i.e. when the effective boresight area is
  less than global.
• The effective boresight area is defined in No.
  1.175, and the effective antenna gain contours
  are defined in No.1.176.
• It is necessary to submit a new effective antenna
  gain contour diagram, corresponding to the
  transmitting beams E4R (should the service area
  be less than global).
• This diagram should include an gain contour with
  a relative gain of 0 dB, representing the limits
  up to which the boresight may be repositioned
  (this will ensure that the GIMS, will correctly
  interpolate gain values in this case), after
  which the -2, -4, -6, -10, and -20 dB contours
  should be marked as appropriate.

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Most frequent errors in submission of Space
Graphical Data

• Corrected Beam E4R Final beam
  E4R created by the GIMS

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Most frequent errors in submission of Space
Graphical Data

• 
  Beam E1R

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Most frequent errors in submission of Space
Graphical Data

• Regional service area restrictions
• For transmitting beam E1R, your ADM notify
  frequency assignments which fall within the
  frequency range 12.5 to 12.75 GHz. The Bureau
  draws your attention to the fact that this
  frequency range is available for use in Regions 1
  and 3 only, there being no allocation to the
  fixed-satellite service in the space-to-Earth
  direction in this band in Region 2.
• This means that the transmitting beam E1R needs
  to be split into two different beam designations
  (E1R/E2R), each with its own associated service
  area (one for the beam concerning assigned
  frequencies in the 10.97 to 11.67 GHz frequency
  range, and one for the beam concerning assigned
  frequencies in the 12.52 to 12.72 GHz frequency
  range).

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Most frequent errors in submission of Space
Graphical Data
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Most frequent errors in submission of Space
Graphical Data
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Most frequent errors in submission of Space
Graphical Data
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Most frequent errors in submission of Space
Graphical Data

• Regional service area restrictions to visible
  parts of Regions 1 3
• Corrected Beam E1R Final beam E1R
  created by the GIMS

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Most frequent errors in submission of Space
Graphical Data

• Diagram of antenna radiation towards the
  geostationary-satellite orbit (GSO)
• With respect to receiving and transmitting beam
  E4R, you notify assigned frequencies which fall
  within bands allocated in the Earth-to-space
  direction as well as the space-to-Earth
  direction. In this case, under Appendix 4,
  Section B.3 f of Annex 2A, you are required to
  supply a diagram of the gain of the space station
  antenna in the direction of those parts of the
  geostationary-satellite orbit which are not
  obstructed by the Earth.

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Most frequent errors in submission of Space
Graphical Data

• Correct antenna radiation diagram towards the
  geostationary-satellite orbit (GSO) beam E4R

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How to submit filing to the Bureau?

• Where Administrations submit electronic filings
  to the Bureau ( on diskette, CD-ROM or as email
  attachment) for several satellite networks or
  earth stations, each network or station should be
  filed in a separate Directory or Folder.
• Each Directory/Folder should then contain the
  following files, as appropriate, for that
  particular network or station
• One Network_Name/Station_Name.mdb file in the SNS
  file format (this file should contain only ONE
  network !!)
• Several Beam_Name.gxt files (if diagrams are
  being provided in the GIMS file format)
• One or several files for the submission of
  graphical data, not in the GIMS file format
• One Network_Name/Station_Name.doc file (for any
  comments pertaining to the network or station)

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How to submit filing to the Bureau?
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How to submit filing to the Bureau?

• When zipped files are submitted, each satellite
  network or earth station should be zipped
  separately. This is especially important when
  notices are submitted by e-mail, which should
  only be sent to the official BR e-mail address
  brmail_at_itu.int

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Submission of Space Graphical Data BR/SSD User
experienceAttila MATASHead of Space Master
Register and Recording SectionBR/SSD/SPR4122
730 6105attila.matas_at_itu.int
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Submission of Space Graphical Data

• Questions ?