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Topic: Mean anomaly

Related Topics

Eccentric anomaly

True anomaly

Mean longitude

Orbital eccentricity

Orbital position vector

Argument of periapsis

Keplerian harmonic law

Eccentricity vector

Orbital angular momentum vector

Astrodynamics

Keplerian elements

Orbital energy

Specific relative angular momentum

Longitude of the periapsis

Orbital elements

	Anomaly - Wikipedia, the free encyclopedia
		The eccentric anomaly is observed from the centre of the ellipse, using a projection of the planet's position onto the circumscribing circle; and
		The mean anomaly is the fraction of an orbital period that has elapsed, expressed as an angle.
		In spacecraft operations, an anomaly is an event that results in an unexpected and unwanted event that may cause a negative impact to the state of health of the spacecraft.
	en.wikipedia.org /wiki/Anomaly (333 words)

	Anomaly - LoveToKnow 1911
		Mean R anomaly is the anomaly which the body would have if it moved from the pericentre around F with a uniform angular motion such that its revolution would be completed in its actual time (see Orbit).
		Eccentric anomaly is defined thus: - Draw the circumscribing circle of the elliptic orbit around the centre C of the orbit.
		In the ancient astronomy the anomaly was taken as the angular distance of the planet from the point of the farthest recession from the earth.
	www.1911encyclopedia.org /Anomaly (428 words)

	Astronomy Answers: From the Astronomical Dictionary
		The true anomaly is the angle (as seen from the Sun) between the Earth and the perihelion of the orbit of the Earth.
		Just as for the true anomaly, the mean anomaly is equal to 0 in the perihelion and to 180 degrees in the aphelion, but at other points along the Earth's orbit the true and mean anomalies are not equal to one another.
		The mean anomaly is often used for one of the orbital elements.
	www.phys.uu.nl /~strous/cgi-bin/glossary.cgi?l=en&o=anomaly (280 words)

	GLOSSARY.DOC - Mean Anomaly (Site not responding. Last check: 2007-11-01)
		The Mean Anomaly is the angle which describes the position of the satellite in its orbit, relative to perigee.
		At perigee, the Mean Anomaly is zero, it increases to 180 degrees at apogee, then back to perigee at 360 degrees.
		A special form of the Mean Anomaly is used by AMSAT controllers - instead of 360 degrees, the orbit fraction is expressed as a number in the range 0-255.
	www.sat-net.com /winorbit/help/kepmeananomaly.html (143 words)

	anomaly
		The true anomaly is the angle between the periapsis of an orbit and the object’s current orbital position, measured from the body being orbited and in the direction of orbital motion.
		The mean anomaly is 0° at periapsis and 180° at apoapsis, just as for the true anomaly, but at other points along the orbit the values of the mean and true anomalies differ.
		The eccentric anomaly is an angle related to both the true anomaly and the mean anomaly that is encountered when solving Kepler’s equation.
	www.daviddarling.info /encyclopedia/A/anomaly.html (209 words)

	Satellite Observing: Orbital Elements
		This is done with the eccentric anomaly which the angle between the satellite's position and the perigee in the plane of the orbit.
		The mean anomly is the anuglar position that a satellite in a circular orbit with the same period (and mean motion).
		Kepler's equation relates the eccentric anomaly and the mean anomaly for an eccentric orbit.
	www.znark.com /sat/elements.html (936 words)

	Mean orbital elements
		Mean orbital elements average the effects of gravitational forces between planets.
		The daily motion changes the mean longitude by the average number of degrees the planet moves in one (mean solar) day.
		The mean anomaly gives the planet's angular position for a circular orbit with radius equal to the semi major axis.
	home.att.net /~srschmitt/planetorbits.html (1103 words)

	Ice Edge
		This shows the mean ice concentration for March in Davis Strait and the Labrador Sea using the average of 24 Marches (1979-2002) of passive microwave ice concentration data.
		The length of the segment, from the mean ice edge to the March 1979 ice edge, is the deviation.
		The arc length of the mean ice edge is measured from Greenland (0 km) to Newfoundland (~2500 km).
	psc.apl.washington.edu /Harry/MadsPeter/ice_edge (1142 words)

	ECMWF
		The plots display the difference between the ensemble mean of the real-time forecast and the ensemble mean of the back-statistics.
		The anomaly has been computed by averaging all the members of the real-time forecast and subtracting the ensemble mean of the back-statistics (model climatology).
		The mean zonal flow represents the average, over all the longitudes, of the difference of geopotential at 500 hpa between latitudes 55N and 35N.
	www.ecmwf.int /research/monthly_forecasting/mofc-products.html (1177 words)

	i/kepler
		Optionally return mean anomaly MA, true anomaly TA, and integer number of orbits, each a dimsof(orbit(1,..))-by-dimsof(time) array.
		ORBIT has leading dimension 12: [angle from perihelion, mean daily motion, semi-major axis, d/dt(semi-major axis), eccentricity, d/dt(eccentricity), longitude of ascending node, d/dt(ascending node), angle from ascending node to perihelion, d/dt(perihelion), inclination, d/dt(inclination)] (Six pairs of a quantity and its time derivative.) The angles are in degrees; d/dt units must match TIME units.
		Mean anomaly is not an angle in real space; it is the quantity proportional to time in Kepler's equation.
	www.maumae.net /yorick/doc/html_i/kepler_i.php (757 words)

	Solving Kepler's Equation
		The mean anomaly M is the angular distance from perihelion which a (fictitious) planet would have if it moved on the circle of radius a with a constant angular velocity and with the same orbital period T as the real planet moving on the ellipse.
		The true anomaly (symbol φ) is the angular distance of the planet from the perihelion of the planet, as seen from the Sun.
		For a circular orbit, the mean anomaly and the true anomaly are the same.
	www.jgiesen.de /kepler/kepler.html (326 words)

	Moon Motion
		the mean distance of the Moon from the ascending node
		The eccentric anomaly (a parameterization of polar angle)
		The mean anomaly is the angle of the line joining the focus (Earth) to a hypothetical body that has the same orbital period but travels at a uniform angular speed:
	www.jgiesen.de /moonmotion/index.html (227 words)

	Looking at Earth From Space - m
		Specifies the mean location (true anomaly specifies the exact location) of a satellite on an orbit ellipse at a particular time, assuming a constant mean motion throughout the orbit.
		Epoch specifies the particular time at which the satellites position is defined, while mean anomaly specifies the location of the satellite at epoch.
		Mean anomaly is measured from 0 degrees to 360 degrees during one revolution.
	www.grc.nasa.gov /WWW/K-12/TRC/laefs/laefs_m.html (1459 words)

	Data @ NASA GISS: GISS Surface Temperature Analysis: 2005 Summation (Site not responding. Last check: 2007-11-01)
		The resulting spatial extrapolations and interpolations are accurate for temperature anomalies at seasonal and longer time scales at middle and high latitudes, where the spatial scale of anomalies is set by Rossby waves (7).
		One large source of differences is the attempt in the GISS method to estimate the temperature anomaly for all areas that have at least one station located within 1200 km, using weights for these stations that decrease linearly with distance from the station.
		The anomaly for the entire belt is then taken as the anomaly for the portion of the belt that has data.
	data.giss.nasa.gov /gistemp/2005 (1337 words)

	[No title]
		* * The notion of a mean sun involves a value for its RA during the year that * on the average is as close to that of the sun as possible.
		One method of determining * the location of the mean sun is to estimate its RA for perigee, compute the EoT for the * year and sum the values of the EoT.
		Repeated such * calculations allows one to converge on a value for the RA of the mean sun at * perigee that gives a value of zero for the some of the EoT.
	www.wengersundial.com /math/analemmaCalc.html (263 words)

	NCDC: Climate of February 1999 - Global Analysis
		Mean monthly temperature anomalies for February (using a base period 1880-1998) are shown in the figure above.
		The ocean temperature anomaly for February 1999, 0.28 degrees C, exhibits a similar drop from the 1998 value, which correspondes to the shift from warm to cold water in the east equatorial Pacific Ocean.
		This snow cover anomaly map indicates areas which had more days with snow cover than is normal for the month (indicated as a positive anomaly with shades of green and blue) as well as areas which had fewer than normal days with snow cover (indicated as a negative anomaly by shades of yellow and red).
	www.ncdc.noaa.gov /oa/climate/research/1999/feb/global.html (950 words)

	Documentation for Comparison Statistics — PCMDI Software Portal
		They are resolved into components including the climatology and year to year anomalies, as well as the zonal mean and deviations from the zonal mean.
		Deviation from the zonal-mean of the annual-mean anomaly
		In this case the annual cycle components (2, 4, 6, 9, 11, 13, 15, 16, 21, and 22) are identically zero, and the descriptive phrase "annual-mean" is not appropriate, and should be replaced simply by "mean" in the case of climatological fields and omitted entirely in the case of anomaly fields.
	www-pcmdi.llnl.gov /software-portal/cdat/contrib/compstat (1545 words)

	Seasonal forecast monthly means and monthly mean anomaly dissemination products
		For most surface fields, monthly mean values, monthly maximum values (i.e., for each grid point the maximum value of the field output during the month), monthly minimum values and monthly standard deviations are created.
		As well as the monthly mean values of fields for each ensemble member, the ensemble mean (TYPE=EM) of each field is available, again for each of the six calendar months of the forecast.
		These are anomalies with respect to the forecast model climate for 1987-2001, and are available as forecast monthly means for each of the six calendar months, both for the individual ensemble members and as an ensemble mean.
	www.ecmwf.int /services/dissemination/3.1/Seasonal_forecast_monthly_means_and_monthly_mean_anomaly_dissemination_products.html (489 words)

	Australian Annual Mean Temperature Anomalies
		Australia's annual mean temperature anomaly is calculated using maximum and minimum temperature data from approximately 130 non-urban observing stations throughout the country.
		Each calendar year the mean maximum and minimum temperature anomalies are calculated for every available high-quality temperature station, relative to the 1961 to 1990 reference period.
		The Australian annual mean temperature anomaly is the average of the Australian mean maximum and minimum temperature anomalies.
	www.bom.gov.au /climate/change/amtemp.shtml (296 words)

	SLA_UE2EL - Universal to Conventional Elements (Site not responding. Last check: 2007-11-01)
		The universal elements are with respect to the mean equator and equinox of epoch J2000.
		The orbital elements produced are with respect to the J2000 ecliptic and mean equinox.
		is the argument of perihelion (radians) a is the mean distance (AU) q is the perihelion distance (AU) e is the eccentricity L is the longitude (radians,
	star-www.rl.ac.uk /star/docs/sun67.htx/node190.html (535 words)

	Keplerian Elements Tutorial
		This means that we can't use the common latitude/longitude coordinate system to specify where the line of nodes points.
		This means that we could accomplish the same thing by specifying either the speed at which the satellite is moving, or its distance from the earth!
		Mean anomaly is simply an angle that marches uniformly in time from 0 to 360 degrees during one revolution.
	www.amsat.org /amsat/keps/kepmodel.html (2793 words)

	Synopsis of Fair Isle's Weather in 1998 (Site not responding. Last check: 2007-11-01)
		With a mean daily temperature of 5.5°C it was a very mild month, though 1989 saw the warmest January with a mean of 6.9°C. The first half of the month was decidedly warm, with the maximum of 11.1°C recorded on the 11
		The mean daily sea temperature of 9.0°C was the highest recorded in January.
		Mean temperature anomaly +0.5° to +1.0° C. Sunny in the southwest, dull in eastern Scotland.
	www.zetnet.co.uk /sigs/weather/1998/text_98.html (3298 words)

	Planet positions using elliptical orbits
		The presession of the equinoxes means that the 'zero' of RA is changing slowly with time, which means that star coordinates must always be referred to an epoch, or date.
		The mean anomaly tells us where the planet would be given mean motion in a circular orbit of radius equal to the semimajor axis.
		With 'peak to mean ratios' like those in the table, you might guess that a time series graph of error against position date would show a complex behaviour, not a simple monotonic rise with time from the date of the elements.
	www.stargazing.net /kepler/ellipse.html (3664 words)

	Kepler's equation and the Equation of Centre
		The mean anomaly is easily worked out from the daily motion (n) given in the orbital elements in the Astronomical Almanac.
		Below is a Visual Basic for Applications routine for returning the eccentric anomaly (e) given the mean anomaly (m), the eccentricity (ecc) and the precision parameter (eps).
		I found the value of the true anomaly produced by each method for each degree of mean anomaly for values of mean anomaly from 0 degrees up to 180 degrees.
	www2.arnes.si /~gljsentvid10/kepler.html (2984 words)

	Meinen and McPhaden -- Observations of warm water volume changes
		All quantities shown are anomalies relative to the climatological mean.
		Depth anomaly is relative to the time mean structure along the equator.
		All quantities have been normalized by removing the mean seasonal cycle and dividing by the interannual standard deviation.
	www.pmel.noaa.gov /pubs/outstand/mein2119/figs.shtml (538 words)

	Keplerian Elements
		The mean anomaly tells you where the satellite is in its orbital path.
		The mean anomaly ranges from 0 to 360 degrees.
		The mean anomaly is referenced to the perigee.
	marine.rutgers.edu /mrs/education/class/paul/orbits.html (659 words)

	Kepler's Second Law
		What it means, obviously, is that CD is much longer than AB, because near perigee the satellite moves much faster and it covers a much greater distance in 3 hours.
		The simplest way of expressing f is to use two auxiliary angles, which like f increase by 360 degrees each orbit, the "eccentric anomaly" E (the letter here has nothing to do with energy) and the "mean anomaly" M; an equation then exists connecting f and E, and another that connects E and M.
		The mean anomaly is what is counted as the third orbital element.
	www-istp.gsfc.nasa.gov /stargaze/Skepl2nd.htm (1242 words)

	Data @ NASA GISS: Earth's Energy Imbalance: Maps (Site not responding. Last check: 2007-11-01)
		Anomalies: Average over a specified mean period and time interval and relative to a given base period
		ESD: Ensemble standard deviation over five runs for a specified mean period (ESD is computed for each such period; the mean of these maps is used).
		Time interval : Years over which data means are averaged or trends are found; if the mean period straddles 2 years, fill in the later year for begin and end.
	data.giss.nasa.gov /imbalance/maps.html (294 words)

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