| 词条 | Spirale |
| 释义 |
Spirale is a French government programme to develop an early warning system which will use infrared satellite imagery to detect the flights of ballistic missiles during their boost phase, just after launch.[1] SPIRALE is an acronym which stands for "Système Préparatoire Infra-Rouge pour l’ALErte", literally "infrared preparatory system for alert". The demonstrator system includes two {{convert|120|kg}} microsatellites and an alert and monitoring ground segment. The satellites have been launched by Ariane 5 on 12 February 2009. References1. ^{{cite web |url=http://www.astrium.eads.net/families/security-satellite-defence-systems-military-missile/futuredefnce/spirale |title=Spirale - Keeping an eye on security |publisher=Astrium}} {{Portal|Spaceflight}}{{Orbital launches in 2009}}{{France-spacecraft-stub}} 3 : Missile defense|Spacecraft launched in 2009|Satellites of France |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。