GCA meaning in Space Science ?

Answer: What is Ground Controlled Approach mean?

In aviation a ground-controlled approach (GCA), is a type of service provided by air-traffic controllers whereby they guide aircraft to a safe landing, including in adverse weather conditions, based on primary radar images. Most commonly a GCA uses information from either a Precision Approach Radar (PAR, for precision approaches with vertical, glidepath guidance) or an Airport Surveillance Radar (ASR, providing a non-precision Surveillance radar approach with no glidepath guidance). The term GCA may refer to any type of ground radar guided approach such as a PAR, PAR without glideslope or ASR. When both vertical and horizontal guidance from the PAR is given, the approach is termed a precision approach. If no PAR glidepath is given, even if PAR equipment is used for lateral guidance, it is considered a non-precision approach.

reference

Full Form	Category
General Classroom Annex	Academic & Science
Gilbert Classical Academy	Academic & Science
Gymnastics and Cheerleading Academy	Academic & Science
Georgia Cumberland Academy	Academic & Science
Golf Channel Academy	Academic & Science
Greig city Academy	Academic & Science
Georgia Cyber Academy	Academic & Science
Galilean Conformal Algebra	Academic & Science
Global Cash Access	Accounts and Finance
Guacamaya	Airport Code
Graphics Communications Association	Business
Georgia Canoe Association	Business
Greil Conveyor Applications, Inc.	Business
Grant Contract Accounting	Business
Grant and Contract Accounting	Business
Geophysical Corp of America	Business
General Contractors Association	Business
Glenmore Christian Acedemy	Community
Greeting Card Association	Community
Gay Callers Association	Community
Garden Centre Association	Community
Golf Clubmakers Association	Community
Gujarati Cultural Association	Community
Greenbrier Christian Academy	Community
Gas Compressor Association	Community
Global Church Advancement	Community
Greenwood Christian Academy	Community
Garden Club of America	Community
Garand Collectors Association	Community
Georgia Chiropractic Association	Community
Group Club Association	Community
Grace Christian Academy	Community
Green Coffee Association	Community
Greenville Christian Academy	Community
Game Control Adapter	Computing
Graphic Communication Association	Computing
Grid Computing and Applications	Computing
General Communications Architecture	Computing
Google Code Archive	Computing
Global Cyber Academy	Computing
Gladiatus Crazy Addon	Computing
Google Camera App	Computing
Google Chromecast Audio	Computing
General Candidate Availablity	Computing
Gross Cropped Area	Country Specific
Get Current Axes	General
Green Car Awards	General
Goetzs Cosmological Argument	General
Goofiest Cooks of America	General
Georgia Chess Association	General
Garden Centers of America	General
Green Coffee Anti	General
General Combining Ability	General
Geochimica et Cosmochimica Acta	General
Guatemala Central America	General
Green Coffee Antioxidant	General
Guest Controller Approval	General
Game Controlled Area	General
God Curse America	General
GURPS Character Assistant	General
Ground Control Approach	General
Graphic Coded Assembler	General
Global Cybersecurity Agenda	General
Global Cleanable Airlock	General
Geospatial Cloud Analytics	General
Global Commission on Adaptation	General
Gulf Coast Avionics	General
Global Center on Adaptation	General
Global Corrective Action	General
Gournal of Chondrite Aficionados	General
Green Car Advisor	General
Gender Changer Academy	General
Georgia Council for the Arts	Governmental
Gun Control Act	Governmental
Global Combat Alliance	Governmental
German Construction Administration	Governmental
Global Cyber Alliance	Governmental
Gulf Coast Authority	Governmental
Geographic Commuting Area	Governmental
Giand Cell Arteritis	Medical
Giant Cell Arteritis	Medical
Ground Control Airborne	Military and Defence
Gradual Channel Approximation	Physics Related
Guacamayas, Colombia	Regional
Gravity Concentrators Africa	Regional
Get Current Axis	Softwares
Ground Controlled Approach	Space Science
General Communication Area	Telecommunication