OD meaning in Space Science ?

Answer: What is Orbit Determination mean?

Orbit determination is the estimation of orbits of objects such as moons, planets, and spacecraft. One major application is to allow tracking newly observed asteroids and verify that they have not been previously discovered. The basic methods were discovered in the 17th century and have been continuously refined.

Observations are the raw data fed into orbit determination algorithms. Observations made by a ground-based observer typically consist of time-tagged azimuth, elevation, range, and/or range-rate values. Telescopes or radar apparatus are used, because naked-eye observations are inadequate for precise orbit determination. With more or better observations, the accuracy of the orbit determination process also improves, and fewer "false alarms" result.

After orbits are determined, mathematical propagation techniques can be used to predict the future positions of orbiting objects. As time goes by, the actual path of an orbiting object tends to diverge from the predicted path (especially if the object is subject to difficult-to-predict perturbations such as atmospheric drag), and a new orbit determination using new observations serves to re-calibrate knowledge of the orbit.

Satellite tracking is another major application. For the US and partner countries, to the extent that optical and radar resources allow, the Joint Space Operations Center gathers observations of all objects in Earth orbit. The observations are used in new orbit determination calculations that maintain the overall accuracy of the satellite catalog. Collision avoidance calculations may use this data to calculate the probability that one orbiting object will collide with another. A satellite's operator may decide to adjust the orbit, if the risk of collision in the present orbit is unacceptable. (It is not possible to adjust the orbit for events of very low probability; it would soon use up the propellant the satellite carries for orbital station-keeping.) Other countries, including Russia and China, have similar tracking assets.

reference

Full Form	Category
Optical Density	Academic & Science
Oxford Dictionary	Academic & Science
Optical Depth	Academic & Science
Outgoing Degree	Academic & Science
Outside Dimension	Academic & Science
Overall Dimention	Academic & Science
Operational Definition	Academic & Science
Outer Diameter	Academic & Science
Outside Discussions	Academic & Science
Overnight Deposit	Accounts and Finance
Overdraft	Banking
Own Damage	Business
Origin Date	Business
Order Description	Business
Organizational Development	Business
Organizational Design	Business
Office Depot	Business
Oregon Diner	Business
One Direction	Community
Organisation Development	Community
On Demand	Community
Over-Dubbed	Community
Open Democracy	Community
Octal Dump	Computer Assembly Language
Optical Disk	Computer Hardware
Open Diary	Computing
Oh, Dear	Computing
Oleaginous Diplomacy	Country Specific
Doctor of Optometry	Educational Degree
Open Drain	Electronics
Opal Diffuser	Electronics
Outside Diameter	Electronics
Overcharge Drinkers	General
Open Doors	General
Olive Destination	General
Other Deposits	General
Out of Date	General
Omni Die	General
Orange Drink	General
Orange Duck	General
Original Duration	General
Order of Disorder	General
Ordnance Datum	General
Other Degree	General
Over Drive	General
Organization Devel	General
Original Designation	General
Od Dump	General
Omnie Die	General
Ocular Dexter	General
Ocean Diver	General
Over Doing	General
Overly Dedicated	General
Off Distance	General
Ocean Drive	General
Oh Dark	General
Outcast Destroyers	General
Office of the Director	Governmental
Oil Dependent	Governmental
Origin Destination	Governmental
Off Duty	Governmental
Old Dominion	Governmental
Operations Department	Governmental
OD	Indian Railway Station
Omne in Die	International
Opus Dei	International
Oder	International
Online Date	Internet
Operating Dispatcher	Jobs
Off Diagonal	Maths
Outside Dimensions	Measurement Unit
Opportunistic Disease	Medical
Occupational Disease	Medical
Occupational Dermatitis	Medical
Oligodendrogliomas	Medical
Ollier disease	Medical
Organ Dysfunction	Medical
Osteochondritis dissecans	Medical
Once Daily	Medical
Oculus Dexter (Right Eye)	Medical
Once a Day	Medical
Order Disorder	Medical
Overdose	Medical
Oculus Dexter	Medical
Oxygen Demand	Medical
Ostrich Disorder	Medical
Opinion Dominatrix	Messaging
On Duty	Messaging
Organization Development	Messaging
Officer of The Day	Military and Defence
Operationally Determined	Military and Defence
Operational Detachment	Military and Defence
Other Detainee	Military and Defence
Olive Drab	Military and Defence
Other Dimension	Physics Related
Originally Detectable	Physics Related
Omni-directional	Radio Science
Operational Downlink	Space Science
Operations Directive	Space Science
Oxygen Drain	Space Science
Orbit Determination	Space Science
Olympic Development	Sports
Operator Dialed	Telecommunication
Malindo Air	Transport & Travel