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COMMENT
DD 12/16/82 Thu 10:36:23
DD 12/17/82 Fri 13:48:13
DD 2/25/83 Fri 10:02:14
comment
…02……02……02……02……02……02……02……02……02……02……02……02…T82-164
…02……02……02……02……02……02……02……02……02… 16 December 1982
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…02……02……02……02……02……02……02……02……02… CRIS/2477/PRP/001
…02……02……02……02……02……02……02……02……02……02……02……02…ISSUE 1
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A- ̲p
SOFTWARE REQUIREMENTS
Software requirements for the CRIS fall into 11 categories. These are as follows:
…02….…02…Communication with Radar Heads
…02…2.…02…Multiradar Tracking
…02…3.…02…Passive Tracking
…02…4.…02…Display of Plot, Track, Strobe, and Background Pic-
…02……02…ture Data
…02…5.…02…Communication with NADGE Site
…02…6.…02…Recording and Reduction
…02…7.…02…Simulation
…02…8.…02…System Control and Cnditioning
…02…9.…02…Communication with Remote Controller
…02…10.…02…Software Development Support
…02…11.…02…General System Performance Requirements
The following is a summary listing of requiremets in each
category.
1.…02…C̲o̲m̲m̲u̲n̲i̲c̲a̲t̲i̲o̲n̲ ̲w̲i̲t̲h̲ ̲R̲a̲d̲a̲r̲ ̲H̲e̲a̲d̲s̲
…02…1.1…02…HDLC - like duplex communication.
…02…1.2…02…Live data receipt and input to plot correlation and
…02……02…display.
…02…1.3…02…Receip of strobe data.
…02…1.4…02…Receipt of 200 (normal) to 400 (heavy) plots/scan.
…02…1.5…02…Masking or filtering of 400 plot input to the degree
…02……02…necessary to track.
…02…1.6…02…2400 baud communication to/from 5 (8) radar heads.
…02…1.7…02…Receipt of radar status data.
…02…18…02…Receipt of clutter data (one minute dedicated
…02……02…transmission).
…02…1.9…02…Continual surveillance (24 hours/day).…86…W …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02…
…02…
…02…1.10…02…Recognition of and routing to Remote Controller all
…02……02…"DESTINATION FLAG" messages.
…02…1.11…02…Recognition and transmission of Remote Control Orders
…02……02…to proper radar heads.
…02….12…02…Receive and process North Mark in real-time.
…02…1.13…02…Receive and utilize air reports or surface reports or
…02……02…both.
2.…02…M̲u̲l̲t̲i̲r̲a̲d̲a̲r̲ ̲T̲r̲a̲c̲k̲i̲n̲g̲
…02…2.1…02…Correlation of plot reports and display as tracks.
…02…2.2…02…Track within the following performance paraeters:
…02……02…-…02…Heading stability…02…9 degrees
…02……02…-…02…Speed stability…02…5% of ground speed
…02……02…-…02…Single radar, non-maneuvering target
…02……02……02… position error : 1.25 data miles or less
…02……02……02… speed errr : 60 DM/hour or less
…02……02……02… heading error : 6…0e…o…0f… or less
…02……02…-…02…Single radar, maneuvering target
…02……02……02…position error : 2 DM or less
…02……02…-…02…3 radar coverage, non-maneuvering target
…02……02……02… position error : 0.4 DM or less
…02……02……02… speed error : 25 DM/houror less
…02……02……02… heading error : 4…0e…o…0f… or less
…02……02…-…02…3 radar coverage, maneuvering target
…02……02……02… position error : 1.3 DM or less
…02…2.3…02…Local track store capacity of 275 tracks (60% growth
…02……02…factor).
…02…2.4…02…Automatic initiation and tracking with minimum
…02……02…operator intervention.…86…W …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02…
…02…2.5…02…Switch action designation of following based on
…02……02…clutter maps:
…02……02…-…02…Auto initiate and tracking allowed (AI areas).
…02……02…-…02…Auto initiate not allowed, auto tracking allowed
…02……02…(NAI areas).
…02……02…-…02…Auto initiate and tracking not allowed (Blank
…02……02……02…areas).
…02…2.6…02…Masking on radar head tests and reflected UTA
…02……02…display.
…02…2.7…02…Storage of masking areas as 800 cells/radar
…02……02…(corresponding to clutter map data ).
…02…2.8…02…Selection ofmasking areas by selection of point
…02……02…pairs.
…02…2.9…02…Track update based on all radar input.
…02…2.10…02…Smoothing based on up-to-date recursive 2nd or 3rd
…02……02…order filter which must be adaptive and especially
…02……02…suited to maneuvers.
…02…2.11…02…Automatic insetion of blank areas and generation of
…02……02…alerts if input reaches limits.
…02…2.12…02…Variable track quality system for promotion from
…02……02…tentative to system track.
…02…2.13…02…Associate relevant plots to remote tracks told by
…02……02…NADGE.
…02…2.14…02…Estimate heightof targets.
…02…2.15…02…Secondary surveillance radar data must be used but
…02……02…not required.
…02…2.16…02…Manual track initiation (indication of 2 consecutive
…02……02…plot positions).
…02…2.17…02…Performance of rate and manual tracking (auto update
…02……02…w/manual correctio).
…02…2.18…02…Local track ID will be non UTN (AA...). NADGE ID's
…02……02…will be used for NADGE told tracks.
…02…2.19…02…19 bits/track must be used for storage.…86…W …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02…
…02…
…02…2.20…02…Control and track repair shall include:
…02……02…-…02…Mask entry
…02……02…-…02…Maps raid designation (with area 16,32, or 64
…02……02……02…DM/side). These will be treated as blank areas -
…02……02……02…at least 3 must be supported
…02……02…-…02…New track/position update
…02……02…-…02…Enter height
…02……02…-…02…Interchange track data (except position)
…02……02…-…02…Drop track
3.…02…P̲a̲s̲s̲i̲v̲e̲ ̲T̲r̲a̲c̲k̲i̲n̲g̲
…02…3.1…02…Generation of strobe line symbols from strobe data.
…02…3.2…02…Designation of system strobes via switch action.
…02…3.3…02…Control and manage systemstrobes with following
…02……02…switch actions:
…02……02…-…02…Enter strobe
…02……02…-…02…Enter strobe width
…02……02…-…02…Update strobe
…02……02…-…02…Drop strobe
…02…3.4…02…Process up to six system strobes
4. D̲i̲s̲p̲l̲a̲y̲ ̲o̲f̲ ̲P̲l̲o̲t̲,̲ ̲T̲r̲a̲c̲k̲,̲ ̲S̲t̲r̲o̲b̲e̲ ̲a̲n̲d̲ ̲B̲a̲c̲k̲g̲r̲o̲u̲n̲d̲ ̲P̲i̲c̲t̲u̲r̲e̲ ̲D̲a̲t̲a̲
…02…4.1…02…Generation and update o 7168 point, 3 bit amplitude
…02……02…clutter maps for each radar.
…02…4.2…02…Calculate time reference for each plot by using time
…02……02…of receipt for a North Mark, the time interval
…02……02…between North Marks, and plot azimuth.
…02…4.3…02…Display of strobe line symbol at original radar
…02……02…positions on the display.
…02…4.4…02…Removal of strobe line symbols at cessation of
…02……02…update.
…02…4.5…02…Display results of multiradar tracking as a
…02……02…surveillance air picture.…86…W …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02…
…02…4.6…02…Track symbols will initially be NADGE standard but
…02……02…will later be STANAG 1241.
…02…4.7…02…Display of all plot data from one or more (to 8)
…02……02…radar heads (200 plots/head).
…02…4.8For single radar presentation, the RH must be
…02……02…centered and range rings generated every 10 miles
…02……02…from center to 50 miles (selectable by operator).
…02…4.9…02…For multiple radar presentation, RH position will be
…02……02…marked relative to a common orign and maximum ranges
…02……02…for each radar will be shown.
…02…4.10…02…History plots will be presented along with current
…02……02…plots (different symbols) - 1,2,3,4,5 or 6 history
…02……02…plots may be selected by the operator and they will
…02……02…be presented in rippl fashion - history plots may be
…02……02…turned off but preserved.
…02…4.11…02…Coastline, GEOREF, and time segment maps will be
…02……02…stored and displayed on demand.
…02…4.12…02…Tracks will be displayed by vectors originating at
…02……02…the track position, extending in te direction of
…02……02…movement (within 2 degrees of tolerance), and
…02……02…extending 1.5mm for each 50 knots of speed.
…02…4.13…02…Track numbers will be selectable for each track,
…02……02…displayed close to the track, and movable by operator
…02……02…command.
…02…4.14…02…NAIareas, blank areas, and TXA areas will be
…02……02…displayed separately.
5.…02…L̲i̲n̲k̲-̲1̲ ̲C̲o̲m̲m̲u̲n̲i̲c̲a̲t̲i̲o̲n̲ ̲w̲i̲t̲h̲ ̲N̲A̲D̲G̲E̲ ̲S̲i̲t̲e̲
…02…5.1…02…Link-1 duplex communication - crosstell protocol.
…02…5.2…02…Receipt of remote tracks.
…02…5.3…02…Linkage to single NADGE site - relinking if
…02…appropriate.
…02…5.4…02…Fallback functioning upon NADGE failure.
…02…5.5…02…Crosstell system strobes to NADGE via Link-1 S.6
…02……02…message.…86…W …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02… …02…
…02…5.6…02…S.O./S.O. test message exchanged both ways every 10 +̲
…02……02…1 seconds.
…02…5.7…02…Crosstell track information both ways using S.4, S.3,
…02……02…S.5, and S.14 messages.
…02…5.8…02…Utilize a crostell area (TXA) for crosstell from
…02……02…CRIS to NADGE.
…02…5.9…02…TXA must be variable in size and proportion with
…02……02…sides parallel to X & Y axes.…02…
…02…5.10…02…NADGE will tell CRIS all tracks except those outside
…02……02…CRIS coverage, tracks told by CRIS, and trcks
…02……02…referenced in S.14 STOP TELL message.
…02…5.11…02…CRIS will tell NADGE all tracks except tracks known
…02……02…to NADGE, tracks outside the TXA, and tracks with an
…02……02…ID not qualified for crosstell.
…02…5.12…02…Common tracks will be told by CRIS if CRIS tr
