Vectorized Solar Azimuth and Elevation Estimation by Darin Koblick

Predict the topocentric solar position defined by geodetic lat, lon, Alt, and a universal time (altitude, julian date, aerospace)

SolarAzEl(UTC,Lat,Lon,Alt)

test_SolarAzEl()

MSIS-E-90 by Drew Compston

NRL MSIS-E-90 atmosphere model. (msis, atmosphere, exosphere)

msis(time, ...

msistest.m

Predicting Apogee and Perigee of the Moon by David Eagle

This MATLAB script uses the MICE geometry finder to predict the time of lunar apogee and perigee. (aerospace, astronomy, astrometry)

gf_apmoon.m

A MATLAB Script for Predicting Transits of Mercury and Venus by David Eagle

Local circumstances of solar transits of the planets Mercury and Venus. (mathematics, simulation, astronomy)

aberat (pos1, ve, tlight)

angles (pos)

applan1 (tjd, ujd, l, n, topo, glon, glat, ht)

Rise and Set of the Sun, Moon and Planets by David Eagle

Topocentric rise and set of the Sun, Moon and planets. Source ephemeris is DE421 with NOVAS routines (aerospace, mathematics, astronomy)

aberat (pos1, ve, tlight)

angles (pos)

applan1 (tjd, ujd, l, n, topo, glon, glat, ht)

A MATLAB Script for Predicting Lunar Occultations by David Eagle

Predict the local circumstances of lunar occultations of a planet or star. (aerospace, mathematics, simulation)

aberat (pos1, ve, tlight)

angles (pos)

applan1 (tjd, ujd, l, n, topo, glon, glat, ht)

A MATLAB Script for Predicting Lunar Eclipses by David Eagle

Predicting the local circumstances of lunar eclipses. (mathematics, simulation, astronomy)

aberat (pos1, ve, tlight)

angles (pos)

applan1 (tjd, ujd, l, n, topo, glon, glat, ht)

A MATLAB Script for Predicting Solar Eclipses by David Eagle

Predict local circumstances of solar eclipses. (astronomy, mathematics, simulation)

aberat (pos1, ve, tlight)

angles (pos)

applan1 (tjd, ujd, l, n, topo, glon, glat, ht)

MATLAB Versions of NOVAS by David Eagle

Several NOVAS Fortran subroutines have been ported to MATLAB. (aerospace, mathematics, astronomy)

aberat (pos1, ve, tlight)

angles (pos)

anmp (a)

Apparent Coordinates of the Moon, Sun or a Planet by David Eagle

MATLAB script that can be used to compute the apparent coordinates of the Moon, Sun or a planet. (aerospace, mathematics, simulation)

aberat (pos1, ve, tlight)

angles (pos)

applan1 (tjd, ujd, l, n, topo, glon, glat, ht)

Selenocentric Coordinates and Transformations by David Eagle

MATLAB functions for computing selenocentric (moon-centered) coordinates and transformations. (aerospace, mathematics, astronomy)

jplephem (et, ntarg, ncent)

lunarlib(jdate)

matran (a1, nax1, a2, nax2, a3, nax3, a4, nax4)

Graphics Display of the Orbital Characteristics of the Moon by David Eagle

MATLAB script which graphically displays the orbital characteristics of the Moon. (aerospace, mathematics, simulation)

atan3 (a, b)

cspice_furnsh(file)

cspice_unload(file)

A MATLAB Script for Predicting Orbital Events of the Moon by David Eagle

A MATLAB script named levents.m that can be used to compute important orbital events of the Moon. (aerospace, mathematics, simulation)

apmoon_func(x)

apmoon_prt(jdtdb)

atan3 (a, b)

Positional Astronomy Library in MATLAB (partial SLALIB library) by Nima Razavi-Ghods

Accurate tool to map from equatorial (RA,DEC) to spherical (TH, PH) coordinates (includes rdplan). (astronomy, alt, altitude)

cldj(IY, IM, ID)

dat(UTC)

dcc2s(V)

A MATLAB Implementation of the IAU 2000B Nutation Theory by David Eagle

A MATLAB function and companion script for calculating nutation based on the IAU 2000B theory. (aerospace, mathematics, astrometry)

findleap(jdate)

funarg (t)

gdate (jdate)

A MATLAB Implementation of the JPL Ephemeris by David Eagle

PDF document and MATLAB scripts and functions that evaluate a JPL binary binary ephemeris file. (aerospace, mathematics, simulation)

cspice_furnsh(file)

cspice_unload(file)

findleap(jdate)

Orbital Elements of the Moon by David Eagle

MATLAB function that calculates the osculating orbital elements of the Moon. (aerospace, mathematics, astronomy)

atan3 (a, b)

elp2000(tjd)

findleap(jdate)

Apparent Position of a Star by David Eagle

PDF document and MATLAB script that computes the apparent position of a star. (aerospace, mathematics, simulation)

aberat (pos1, ve, tlight)

angles (pos)

apstar1 (tjd, ujd, n, topo, glon, glat, ht, ...

A MATLAB Script for Predicting Equinoxes and Solstices by David Eagle

Predict the calendar date & UTC time of the equinoxes and solstices for a user-defined calendar year (mathematics, simulation, astronomy)

atan3 (a, b)

brent (f, x1, x2, rtol)

esfunc(x)

EME2000 to/from True-of-Date Transformation by David Eagle

This Matlab script converts between true-of-date and EME2000 state vectors using Mice routines. (aerospace, mathematics, simulation)

atan3 (a, b)

cspice_et2utc(et, format, prec )

cspice_furnsh(file)

Ephemeris Calculations with MICE by David Eagle

Demonstrates ephemeris calculations using the MATLAB version of the JPL Spice library (MICE). (aerospace, mathematics, simulation)

cspice_deltet( epoch, eptype )

cspice_et2utc(et, format, prec )

cspice_furnsh(file)

Selenocentric Coordinates and Transformations by David Eagle

MATLAB scripts and functions for computing useful selenocentric coordinates and transformations. (aerospace, mathematics, astronomy)

jplephem (et, ntarg, ncent)

lunarlib(jdate)

matran (a1, nax1, a2, nax2, a3, nax3, a4, nax4)

Precision Sun Ephemeris by David Eagle

Computes true-of-date, geocentric right ascension, declination and position vector of the Sun. (aerospace, mathematics, simulation)

atan3 (a, b)

deg2dms (dd)

gdate (jdate)

Low-precision Ephemeris by David Eagle

MATLAB functions that compute a low-precision ephemeris for the Sun, Moon and planets. (aerospace, mathematics, astronomy)

atan3 (a, b)

earth (jdate)

gdate (jdate)

A MATLAB Implementation of the SLP96 Ephemeris by David Eagle

MATLAB function and script that demonstrates how to interact with the SLP96 binary ephemeris. (aerospace, mathematics, astronomy)

deg2dms (dd)

gdate (jdate)

getdate

Looking Up by Matt Tearle

A planisphere for any given location and time. (astronomy, gui, app)

Looking Up

SKY MAP by Daniel Okoh

A MATLAB software that shows the position and relative brightness of stars in the sky (sky map, gui, star)

SkyMap(varargin)

Astronomy Software for Computing Azimuth, Elevation, Julian Date, GMST, and LMST. by Daniel Okoh

The software converts RA and DEC to Azimuth and Elevation, plus lots of other things (astronomy, elevation, dec)

AstroTool(varargin)

Equation of Time by Darin Koblick

Compute the equation of time with accuracy on the order of seconds. (equation of time, astronomy, solar)

EquationOfTime(UTCjd)

MSPA by Anders Lennartsson

A mex interface function to the C function spa.c developed by NREL for computing solar position. (astronomy, solar energy)

analemma.m

mspa.m

mspa_tester.m

Lunar Azimuth and Altitude Estimation Algorithm by Darin Koblick

Predict the Lunar Azimuth and Altitude within +/- .2 deg of any lat and lon for a given UTC (azimuth, gmt, moon)

LunarAzEl(UTC,Lat,Lon,Alt)

Disk Harmonic Functions by Carey Smith

Computes Disk Harmonic Functions; uses Bessel functions and derivatives (mathematics, physics, harmonic bessel)

DiskHarmonic(m,n,r,theta)

Right ascension/declination to azimuth/elevation by Frank Breitling

Mapping from equatorial to horizontal coordinates - i.e. from RA/Dec to az/el (Alt/Az) (aerospace, astronomy, azimuth)

RADec2AzEl(RA,Dec,UTC,Lat,Lon,Alt)

Moon Position by James Tursa

moonpos calculates moon position accurate to 10 arcsec. Based on Astronomical Algorithms, Meeus (astronomical, meeus, lunar)

moonpos(varargin)

moonpos_examples.m

Night On Earth by Sam Roberts

An animated moon orbiting the earth (gallery, visualisation, graphics)

Earth and Moon from Space

nightonearth

Building Sundials by Ned Gulley

Create your own sundial with MATLAB. (whitepaper, article, sundials)

Building Sundials

sunshadow(latitude, day, hour)

Conversion between Equatorial and Ecliptic Coordinates by Dmitry Savransky

Convert between the equatorial and ecliptic celestial coordinate systems. (astronomy, aerospace, mathematics)

eclip2equat(lambda,beta)

equat2eclip(alpha,delta)

sun_position.m by Vincent Roy

Sun position given observer time/location. (elevation, azimuth, earth sciences)

sun_position(time, location)

greg2julian by Gabriel Ruiz

This function converts the Gregorian dates to Julian dates. (clock, fun, julian date gregorian...)

[JD,julianday] =greg2julian(year,month,day,hour,min,sec)

MINCONNECT by Vassili Pastushenko

adjacency matrix/plot of minimally connected X,Y points (optimization, graph theory, optimal traffic)

[M,ZZ]=minconnect(varargin)