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atbMissilePropDataFixedAlt('centBody', startPosCBF, endPosCBF, startTime, longWay, apogeeAlt) 说明：centBody - valid central body name, i.e. 'Earth' startPosCBF - 3x1 CBF position vector [x;y;z] (meters) endPosCBF - 3x1 CBF position vector [x;y;z] (meters) startTime - time corresponding to startPosCBF (sec) longWay - flag to generate the trajectory the long way around the central body apogeeAlt - apogee altitude of the trajectory (meters) posCBI - 3x1 initial position [x;y;z] (meters) velCBI - 3x1 initial velocity [vx;vy;vz] (m/s) deltaTime - time of flight (sec) deltaV - velocity impulse required for trajectory(m/s) 备注：Determines the initial inertial position and velocity for a missile trajectory between two CBF position vectors. 3.10.10 atbMissilePropDataFixedDelta 作用： 用法： 说明： 3.10.11 atbMissilePropDataMinEnergy 作用：Missile propagator data - minimum energy 用法：[posCBI, velCBI, deltaTime, apogeeAlt, deltaV] = atbMissilePropDataMinEnergy ( 'centBody', startPosCBF, endPosCBF, startTime, longWay) 说明：centBody - valid central body name, i.e. 'Earth' startPosCBF - 3x1 CBF position vector [x;y;z] (meters) endPosCBF - 3x1 CBF position vector [x;y;z] (meters) startTime - time corresponding to startPosCBF (sec) longWay - flag to generate the trajectory the long way around the central body posCBI - 3x1 initial position [x;y;z] (meters) velCBI - 3x1 initial velocity [vx;vy;vz] (m/s) deltaTime - time of flight (sec) apogeeAlt - apogee altitude of the trajectory (meters) deltaV - velocity impulse required for trajectory(m/s) 3.10.12 atbTLERead 作用：Read a 2-line element set file 用法：vehNames = atbTLERead('fileName', 'prefix') 说明：fileName - full path to TLE file in a format readable by STK prefix - string to prepend to the name of each TLE in the file vehNames - cell array of loaded TLE names 备注：Extracts TLEs from the specified file and store for use by atbTLEProp Consult STK documentaiton for further information on TLE files 3.10.13 atbTLEGetAll 作用：Get all loaded 2-line element sets 用法：vehNames = atbTLEGetAll 说明：vehNames - cell array of all loaded TLE names 备注：Lists all TLEs available for use by atbTLEProp Consult STK documentaiton for further information on TLE files 3.10.14 atbTLEDelete 作用：删除2行根数设置 用法：atbTLEDelete(vehNames) 说明：vehNames - single name or cell array of TLE names 备注：Deletes the specified TLEs from memory 3.10.15 atbTLEProp 作用：设置SGP4两行根数运动属性参数 用法：[times, posECF, velECF] = atbTLEProp('vehName', timeStart, timeStop, timeStep) 说明：vehName - loaded TLE name timeStart - propagation start time (sec) timeStop - propagation stop time (sec) timeStep - propagation time step (sec) times - N length array of times relative to the internal ATB epoch posECF - 3xN ECF position matrix [x;y;z] (meters) velECF - 3xN ECF velocity matrix [vx;vy;vz] (m/s) 3.10.16 atbTLEEpoch 作用：获取SGP4两行根数的历元 用法：epoch = atbTLEEpoch('vehName') 说明：vehName - loaded TLE name epoch - the offset in sec form the internal ATB epoch 备注：Returns the offset in sec from the internal ATB epoch 3.10.17 atbTLEInfo 作用：获取SGP4两行根数 用法：tleInfo = atbTLEInfo('vehName') 说明：vehName - loaded TLE name tleInfo - structure with the following fields: orbitEpoch - string date in YYDDD.SSSSSSS format meanMotion - rev/day eccentricity - unitless inclination - units in radians argOfPerigree - units in radians RAAN - units in radians meanAnomaly - units in radians meanMotionDot meanMotionDotDot bStar - m^2/kg 备注：Returns the two-line-element set data for a loaded vehicle 3.11 导航精度（Navigation Accuracy） 3.11.1 atbComputeDOP 作用：计算精度因子 用法：[dop, bestInd] = atbComputeDOP(posVecs, N) dop = atbComputeDOP(posVecs) 说明：posVecs - a 3xM matrix of nav beacon positions [x;y;z] (meters), 4 <= M <= 30 N - optional integer value to compute the optimal subset of the beacons. Meaningless unless N < M. N <= 30. bestInd - a length N vector of indices into optimal beacons. dop - a structure with the following fields: GDOP PDOP HDOP VDOP TDOP HMajDOP - the local horizontal error ellipse major axis HMinDOP - the local horizontal error ellipse minor axis HMajAz - the rotation angle (from the x axis) of the local horizontal error ellipse 备注：Computes dilution of precision based on the optimal set of N beacons from the input array. The optimal set of N is determined as the set that yields the minimum GDOP. The beacon positions should be expressed in a local horizontal coordinate system so the DOP values may be interpreted as stated. This local coordinate system should have Z pointed toward the center of the Earth, or perpendicular to the surface and X should be oriented in a north-south sense. The best array will be filled with the indices of the beacons that yield the minimum GDOP 3.12 地图数据（Map Data） 3.12.1 atbMapDetails 作用：地图细节Earth map details 用法：xyCell = atbMapDetails(mapName) 说明：mapName - one of the following strings: 'coasts' - coastlines 'intl' - international boundaries 'islands' - ocean islands 'lakes' - freshwater lakes 'prov' - provincial boundaries, e.g. US State lines 'rivers' - freshwater rivers xyCell - cell array with elements containing 2xN matrices of [lon;lat] (deg). 3.12.2 atbPlotMapDetails 作用：绘地图Plot Earth map details 用法：hl = atbPlotMapDetails(hax, mapName, style) 说明：mapName - one of the following strings: 'coasts' - coastlines 'intl' - international boundaries 'islands' - ocean islands 'lakes' - freshwater lakes 'prov' - provincial boundaries, e.g. US State lines 'rivers' - freshwater rivers style - a plot line style, see the help for PLOT hl - handles to lines 3.13 覆盖网格（Coverage Grids） 3.13.1 atbGetPolyHandle 作用：获取多边形句柄 用法：hGrid = atbGetPolyHandle(XYpolygon) 说明：XYpolygon - a 2xN matrix of positions [x;y] (unitless), N >= 3 hGrid - grid handle for use in atbInsidePoly and atbClearPolyHandle 备注：Generates a grid handle for a polygon. The grid handle is used by atbInsidePoly to determine if a point is enclosed by the polygon. 3.13.2 atbInsidePoly 作用：检查一个点是否为多边形的点 用法：inside = atbInsidePoly(hGrid, XYpoints) 说明：hGrid - handle obtained from atbGetPolyHandle XYpoints - 2xN matrix of points to check [x;y] (unitless) inside - 1xN vector of flags indicating if the corresponding point is enclosed by the polygon represented by hGrid. 3.13.3 atbClearPolyHandle 作用：清除多边形句柄 用法：atbClearPolyHandle(hGrid) atbClearPolyHandle('ALL') 说明：hGrid - vector of handles to polygon grids to clear from memory.