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# Documentation Center

• Trial Software

# Functions in Aerospace Toolbox

• By Category | Alphabetical List
• ## Data Import

 datcomimport Bring DATCOM file into MATLAB environment

## Coordinate Systems

### Axes Transformations

 angle2dcm Create direction cosine matrix from rotation angles angle2quat Convert rotation angles to quaternion dcm2alphabeta Convert direction cosine matrix to angle of attack and sideslip angle dcm2angle Create rotation angles from direction cosine matrix dcm2latlon Convert direction cosine matrix to geodetic latitude and longitude dcm2quat Convert direction cosine matrix to quaternion dcmbody2wind Convert angle of attack and sideslip angle to direction cosine matrix dcmecef2ned Convert geodetic latitude and longitude to direction cosine matrix dcmeci2ecef Convert Earth-centered inertial (ECI) to Earth-centered Earth-fixed (ECEF) coordinates ecef2lla Convert Earth-centered Earth-fixed (ECEF) coordinates to geodetic coordinates flat2lla Estimate array of geodetic latitude, longitude, and altitude coordinates from flat Earth position geoc2geod Convert geocentric latitude to geodetic latitude geod2geoc Convert geodetic latitude to geocentric latitude lla2ecef Convert geodetic coordinates to Earth-centered Earth-fixed (ECEF) coordinates lla2flat Estimate flat Earth position from geodetic latitude, longitude, and altitude quat2angle Convert quaternion to rotation angles quat2dcm Convert quaternion to direction cosine matrix

### Flight Parameters and Quaternion Math

 airspeed Airspeed from velocity alphabeta Incidence and sideslip angles correctairspeed Calculate equivalent airspeed (EAS), calibrated airspeed (CAS), or true airspeed (TAS) from one of other two airspeeds dpressure Compute dynamic pressure using velocity and density geocradius Estimate radius of ellipsoid planet at geocentric latitude machnumber Compute Mach number using velocity and speed of sound rrdelta Compute relative pressure ratio rrsigma Compute relative density ratio rrtheta Compute relative temperature ratio quatconj Calculate conjugate of quaternion quatdivide Divide quaternion by another quaternion quatinv Calculate inverse of quaternion quatmod Calculate modulus of quaternion quatmultiply Calculate product of two quaternions quatnorm Calculate norm of quaternion quatnormalize Normalize quaternion quatrotate Rotate vector by quaternion

## Unit Conversions

 convacc Convert from acceleration units to desired acceleration units convang Convert from angle units to desired angle units convangacc Convert from angular acceleration units to desired angular acceleration units convangvel Convert from angular velocity units to desired angular velocity units convdensity Convert from density units to desired density units convforce Convert from force units to desired force units convlength Convert from length units to desired length units convmass Convert from mass units to desired mass units convpres Convert from pressure units to desired pressure units convtemp Convert from temperature units to desired temperature units convvel Convert from velocity units to desired velocity units decyear Decimal year calculator juliandate Julian date calculator leapyear Determine leap year mjuliandate Modified Julian date calculator

## Environment

 atmoscira Use COSPAR International Reference Atmosphere 1986 model atmoscoesa Use 1976 COESA model atmosisa Use International Standard Atmosphere model atmoslapse Use Lapse Rate Atmosphere model atmosnonstd Use climatic data from MIL-STD-210 or MIL-HDBK-310 atmosnrlmsise00 Implement mathematical representation of 2001 United States Naval Research Laboratory Mass Spectrometer and Incoherent Scatter Radar Exosphere atmospalt Calculate pressure altitude based on ambient pressure earthNutation Implement Earth nutation geoidegm96 Calculate geoid height as determined from EGM96 Geopotential Model geoidheight Calculate geoid height gravitycentrifugal Implement centrifugal effect of planetary gravity gravitysphericalharmonic Implement spherical harmonic representation of planetary gravity gravitywgs84 Implement 1984 World Geodetic System (WGS84) representation of Earth's gravity gravityzonal Implement zonal harmonic representation of planetary gravity igrf11magm Calculate Earth's magnetic field using 11th generation of International Geomagnetic Reference Field moonLibration Moon librations planetEphemeris Position and velocity of astronomical objects wrldmagm Use World Magnetic Model

## Gas Dynamics

 flowfanno Fanno line flow relations flowisentropic Isentropic flow ratios flownormalshock Normal shock relations flowprandtlmeyer Calculate Prandtl-Meyer functions for expansion waves flowrayleigh Rayleigh line flow relations

## Visualize Trajectory and Attitude

### Axes Transformations

 angle2dcm Create direction cosine matrix from rotation angles angle2quat Convert rotation angles to quaternion dcm2alphabeta Convert direction cosine matrix to angle of attack and sideslip angle dcm2angle Create rotation angles from direction cosine matrix dcm2latlon Convert direction cosine matrix to geodetic latitude and longitude dcm2quat Convert direction cosine matrix to quaternion dcmbody2wind Convert angle of attack and sideslip angle to direction cosine matrix dcmecef2ned Convert geodetic latitude and longitude to direction cosine matrix dcmeci2ecef Convert Earth-centered inertial (ECI) to Earth-centered Earth-fixed (ECEF) coordinates ecef2lla Convert Earth-centered Earth-fixed (ECEF) coordinates to geodetic coordinates flat2lla Estimate array of geodetic latitude, longitude, and altitude coordinates from flat Earth position geoc2geod Convert geocentric latitude to geodetic latitude geod2geoc Convert geodetic latitude to geocentric latitude lla2ecef Convert geodetic coordinates to Earth-centered Earth-fixed (ECEF) coordinates lla2flat Estimate flat Earth position from geodetic latitude, longitude, and altitude quat2angle Convert quaternion to rotation angles quat2dcm Convert quaternion to direction cosine matrix

### Flight Simulator Interfaces

 Aero.FlightGearAnimation Construct FlightGear animation object

### MATLAB Based Animation

 Aero.Animation Visualize aerospace animation Aero.Body Create body object for use with animation object Aero.Camera Construct camera object for use with animation object Aero.Geometry Construct 3-D geometry for use with animation object

### Virtual Reality Animation

 Aero.Node Create node object for use with virtual reality animation Aero.Viewpoint Create viewpoint object for use in virtual reality animation Aero.VirtualRealityAnimation Construct virtual reality animation object