function Stars = characteristics_Stars % characteristics_Stars: Settings for the star selection algorithm. %------------------------------------- % Rev# Date Who Purpose % ---- -------- --------- --------- % 000 07/01/02 P.Goulart Original % 001 10/22/02 S.Bucher Added General.ERImageSize % 002 12/15/02 s.Bucher Updated stage settings per SS&AWG % 003 07/08/03 S.Bucher Updated Bad Pixel List % 004 07/23/03 S.Bucher Updated Bad Pixel List - DK Cur 2003195 % 005 10/29/03 S.Bucher Added DoBminusBcheck % 006 01/13/04 S.Bucher Updated Bad Pixel List % 007 05/18/04 S.Bucher Added geometry check for FIDs and traps % 008 05/24/04 S.Bucher Replaced nMinCand with nSurplus % 009 07/15/04 S.Bucher Updated Bad Pixel List %------------------------------------- %The Stars portion of the the characteristics structure is %defined here. Each of the sub-structure (General, Acq, Guide, %Fid) is created, and then they all get slapped together into %the output 'Stars' at the very end. %----------------------------------------------------------------- %ACA values - Conversions, boundaries, bad pixels, etc %----------------------------------------------------------------- %ACA to pixel frame conversion. (arcseconds to pixels) General.Aca2Pix = [6.08840495576943 4.92618563916467; 0.000376181788609776 0.200203020554239; -0.200249577514165 0.000332284183255046; -2.7052897180601e-009 -5.35702097772202e-009; 9.75572638037165e-010 1.91073314224894e-008; -2.94865155316778e-008 -4.85766581852866e-009; 8.31198018312775e-013 2.01092070428495e-010; -1.96043819238097e-010 5.09721545876414e-016; 5.14134244771463e-013 1.99339355492595e-010; -1.97282476269237e-010 2.52739834319184e-014]; %Pixel to arcsecond conversion General.Pix2Arc = 4.96289; %Default star search area and cutoff magnitude General.CatalogRadius = 1.1; %get stars over this radius for search (deg) General.CatalogMinMag = 14.5; %stars dimmer than this value are ignored %initial maneuver attitude uncertainty and search box error margin General.ManvrErrorSigmaInit = [10.0,0.1,0.1]*pi/180/3600; General.ManvrErrorSearchBoxMargin = 20.0*pi/180/3600;; %bad star list General.BadStarList = [... 260972216,... 260968880,... 1196953168,... 1004817824,... 301078152,... 301080376,... 301465776,... 300948368,... 692724384]; %Min commandable magnitude General.ACAFaintCommandLimit = 13.98; %Minimum commandable error bar (command must be %at least MAG_ACA +- this value General.minCmdMagErrorBar = 1.5; %Star acquisition time used for scheduling General.StarAcqTime = 270; % Image Size for ERs (defined here as attitudes with no fid lights requested) % choose 0 for 4x4, 1 for 6x6 and 2 for 8x8 General.ERImageSize=2; %----------------------------------------------------------------- %General Star Selection Settings %----------------------------------------------------------------- %First create a general set of Acq/Guide/Fid settings called %'Star'. This is where the default parameters for each stage %are defined. Once Star is constructed, The Acq/Guide/Fid fields %are created by making a copy of 'Star', and then modifying %or appending as required. Don't confuse the generic search %settings 'Star' with the ultimate output 'Stars' Star.SearchSettings.DoColumnRegisterCheck = 1; %Star.SearchSettings.NMinCand = 9; Star.SearchSettings.DoBminusVcheck = 1; %----------------------------------------------------------------- %Inertial Checks %----------------------------------------------------------------- %Define some useful parameters here. Star.Inertial.MagLimit = [5.8 10.2]; %in magnitude units Star.Inertial.MagErrorTol = 100; %in 0.01 mag increments Star.Inertial.PosErrorTol = 3000; %in milli arc seconds Star.Inertial.ASPQ1Lim = [0 0]; %ASPQ1 must be in this range (magnitude spoilers) Star.Inertial.ASPQ2Lim = [0 0]; %ASPQ2 must be in this range (proper motion spoilers) Star.Inertial.ASPQ3Lim = [0 999]; %ASPQ3 must be in this range (neighbor with undef pos error) Star.Inertial.VARIABLELim = -9999; %VARIABLE must be no bigger than this (variable magnitude marker: -9999 = not variable) Star.Inertial.MagErrRand = 0.26; %Random Magnitude Error in magnitude units Star.Inertial.MagErrSyst = 0; %Systematic Error - This value is a linear expansion of the mag error in BOTH directions, A Positive value INCREASES the magnitude error Star.Inertial.MaxMagError = 1.5; %magnitude errors are limited to this value %----------------------------------------------------------------- %Roll and Camera Dependent Checks %----------------------------------------------------------------- Star.Body.Column.MagDiff = 5; Star.Body.Column.Separation = 4; Star.Body.Register.MagDiff = 5; Star.Body.Register.Separation = 4; Star.Body.Register.Width = 2; %Define some of the boundaries of the chips Star.Body.Pixels.ZPixLim = [-512.5 511.5]; %+- extent in Z direction Star.Body.Pixels.YPixLim = [-512.5 511.5]; %+- extent in Y direction Star.Body.Pixels.Center = [-0.5 -0.5]; %Y-Z position of quadrants joint Star.Body.Pixels.EdgeBuffer = 5; Star.Body.Traps.Column = [347]; %trap positions in pixels (for geometric check) Star.Body.Traps.Row = [-374]; Star.Body.Traps.DeltaColumn = [3]; Star.Body.Traps.ExclusionZone.Neg=[-6 -2]; Star.Body.Traps.ExclusionZone.Pos=[3 7]; %Stars this many pixels from the edge cannot be candidates %ie, shrinks the effective search area for candidates Star.Body.FOV.YArcSecLim = [-2410 2473]; %+- limits on star positions in arcseconds. Star.Body.FOV.ZArcSecLim = [-2504 2450]; %set to [-Inf +Inf to ignore this check] %(1=y-pixel min, 2=y-pixel max, 3=z-pixel min, 4=z-pixel max) %QUAD BOUNDARIES MUST BE FIRST TWO ENTRIES Star.Body.Pixels.BadPixels = [ ... -512, 511, -1, 0; ... -1, 0, -512, 511; ... -510, -510, 158, 158; ... -495, -495, -48, -48; ... -491, -491, -435, -435; ... -382, -382, 328, 328; ... -375, -375, -403, -403; ... -335, -335, 99, 99; ... -235, -235, -158, -158; ... -217, -217, 207, 207; ... -169, -169, -1, -1; ... -154, -154, -200, -200; ... -101, -101, 354, 354; ... -100, -100, 470, 470; ... -44, -44, -478, -478; ... -34, -34, 423, 423; ... -20, -20, -493, -493; ... -13, -13, 497, 497; ... 12, 12, -68, -68; ... 46, 46, 136, 136; ... 186, 186, -491, -491; ... 270, 270, -333, -333; ... 274, 274, -427, -427; ... 285, 285, 99, 99; ... 286, 286, 127, 127; ... 392, 392, -32, -32; ... 418, 418, -505, -505; ... 448, 448, -454, -454; ... -245, 0, 454, 454; ... ]; %----------------------------------------------------------------- %Spoiler Parameters %----------------------------------------------------------------- Star.Spoiler.MinSep = 7; %minimum spoiler separation (pixels) Star.Spoiler.MaxSep = 11; %maximum search box size (pixels) Star.Spoiler.Intercept = 9; %0 magnitude difference intercept (pixels) Star.Spoiler.Slope = 1/2; %spoiler slope boundary Star.Spoiler.SigErrMultiplier = 3; %multiplier for 1-sigma error calculations Star.Spoiler.MagDiffLimit = -Inf; %Stars this much dimmer can't ever be spoilers %-Inf means all stars will be considered %This value is checked against the difference %in nominal magnitudes, regardless of errors %----------------------------------------------------------------- %Acq Selection Values %----------------------------------------------------------------- %Make a copy of the generic settings, and tack on %a few Acq specific settings Acq = Star; Acq.Select.MaxSearchBox = [120 140 160 180 200 220 240]; %maximum search box size (arcsec) %smallest valid value is chosen %given maneuver/dither error Acq.Select.MinSearchBox = 25; %maximum search box size (arcsec) Acq.Select.NMaxSelect = 8; %maximum acquisition stars Acq.Select.nSurplus = 0; %----------------------------------------------------------------- %Acq Staging Values %----------------------------------------------------------------- %Now define the search stages. Each stage is %just a copy of the one before it, plus a few %further modifications. There is no limit to %the number of search stages (i.e., the # of %search stages is DEFINED as length(Acq) %Stage 1 Acq.Body.Pixels.BadPixels(1:2,:) = []; %no quad boundaries for Acq stars %Stage 2 Acq(2) = Acq; Acq(2).Inertial.MaxMagError = 1; Acq(2).Spoiler.SigErrMultiplier = 1; Acq(2).SearchSettings.DoColumnRegisterCheck = 0; Aqq(2).Inertial.MagLimit = [5.8 10.7]; %Stage 3 Acq(3) = Acq(2); Acq(3).Spoiler.SigErrMultiplier = 0; Acq(3).Body.Pixels.BadPixels = []; %no bad pixels Acq(3).Inertial.MagLimit = [5.8 11.0]; %Stage 4 Acq(4) = Acq(3); Acq(4).SearchSettings.DoBminusVcheck = 0; %----------------------------------------------------------------- %Guide Selection values %----------------------------------------------------------------- %Make a copy of the generic settings, and tack on %a few Guide specific settings Guide = Star; Guide.Select.NMaxSelect = 8; %maximum guide stars Guide.Select.MaxSearchBox = 25; %guide search boxes are always this size Guide.Select.MinSearchBox = 25; %maximum search box size (arcsec) Guide.Select.LeverArm = 1.*pi/180; %Lever arm factor for guide star optimization Guide.Select.NDirectSearch = nchoosek(12,5); %maximum combinations for direct search Guide.Select.C_10 = 1444.0; %ODB_CO_MAG_10 Guide.Select.CCDIntTime = 1.4; %????? Guide.Select.Sig_P1 = 16.2; %ODB_SIGMA_P1 Guide.Select.Sig_P2 = 0.5; %ODB_SIGMA_P2 %Guide.SearchSettings.NMinCand = 6; %search staging proceeds until this many found Guide.Select.nSurplus = 1; %----------------------------------------------------------------- %Guide Staging Values %----------------------------------------------------------------- %Now define the search stages. Each stage is %just a copy of the one before it, plus a few %further modifications. There is no limit to %the number of search stages (i.e., the # of %search stages is DEFINED as length(Guide) Guide(2) = Guide(1); Guide(2).Inertial.MagErrRand = 0.15; Guide(2).Spoiler.SigErrMultiplier = 2; Guide(2).Inertial.MaxMagError = 1; Guide(3) = Guide(2); Guide(3).Inertial.MagErrRand = 0.0; Guide(3).Spoiler.SigErrMultiplier = 1; Guide(3).Inertial.MaxMagError = 0.5; Guide(3).Inertial.MagLimit = [5.8 10.7]; Guide(4) = Guide(3); Guide(4).Spoiler.SigErrMultiplier = 0; Guide(4).Inertial.MaxMagError = 0.5; Guide(4).Inertial.MagLimit(2) = 11.2; Guide(4).Inertial.MagLimit = [5.8 11.2]; Guide(5) = Guide(4); Guide(5).SearchSettings.DoBminusVcheck = 0; %----------------------------------------------------------------- %FID Selection values %----------------------------------------------------------------- %Make a copy of the generic settings, and tack on %a few Fid specific settings Fid = Star; Fid.Select.SearchBox = 25; %Fid search box size in arcseconds Fid.Select.MagBrightLimit = 5.8; %Max magnitude for ACA catalog Fid.Select.MagFaintLimit = 8; %Min magnitude for ACA catalog Fid.Spoiler.MinSep = 5; %Anything less than 5 pix, rejected Fid.Spoiler.MaxSep = 5; %anything more than 5 pix, ok Fid.Spoiler.Intercept = 5; Fid.Spoiler.Slope = 1/2; Fid.Spoiler.SigErrMultiplier = 3; Fid.Spoiler.MagDiffLimit = -5; Fid.SearchSettings.DoGeometricTrapCheck=1; %Now define the search stages. Each stage is %just a copy of the one before it, plus a few %further modifications. There is no limit to %the number of search stages (i.e., the # of %search stages is DEFINED as length(Fid) %Add a second stage with a more liberal mag cuttoff %limit for spoilers Fid(2) = Fid(1); Fid(2).Spoiler.MagDiffLimit = -4; %----------------------------------------------------------------- %----------------------------------------------------------------- %Assemble it all into one structure %----------------------------------------------------------------- Stars.General = General; Stars.Acq = Acq; Stars.Guide = Guide; Stars.Fid = Fid;