搜尋結果
Samples of three GPS satellites' orbits over a five-year period (2013 to 2018) USA-242 · USA-239 · USA-151 · Earth As of 15 August 2023, 83 Global Positioning System navigation satellites have been built: 31 are launched and operational, 4 are unhealthy or in reserve, 41 are retired, 2 were lost during launch, and 1 prototype was never launched. 4 Block III satellites have completed ...
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to ...
- United States
- Military, civilian
- Operational
- US Space Force
- System Description
- Satellites
- Status
- See Also
- Standards
- Bibliography
GLONASS is a global navigation satellite system, providing real time position and velocity determination for military and civilian users. The satellites are located in middle circular orbit at 19,100 km (11,900 mi) altitude with a 64.8° inclination and an orbital period of 11 hours and 16 minutes (every 17 revolutions, done in 8 sidereal days, a sa...
The main contractor of the GLONASS program is Joint Stock Company Information Satellite Systems Reshetnev (ISS Reshetnev, formerly called NPO-PM). The company, located in Zheleznogorsk, is the designer of all GLONASS satellites, in cooperation with the Institute for Space Device Engineering (ru:РНИИ КП) and the Russian Institute of Radio Navigation...
Availability
As of 1 July 2023[update], the GLONASS constellation status is: The system requires 18 satellites for continuous navigation services covering all of Russia, and 24 satellites to provide services worldwide.[citation needed]The GLONASS system covers 100% of worldwide territory. On 2 April 2014, the system experienced a technical failure that resulted in practical unavailability of the navigation signal for around 12 hours. On 14–15 April 2014, nine GLONASS satellites experienced a technical fai...
Accuracy
According to Russian System of Differentional Correction and Monitoring's data, as of 2010[update], precision of GLONASS navigation definitions (for p=0.95) for latitude and longitude were 4.46–7.38 m (14.6–24.2 ft) with mean number of navigation space vehicles (NSV) equals 7—8 (depending on station). In comparison, the same time precision of GPS navigationdefinitions were 2.00–8.76 m (6 ft 7 in – 28 ft 9 in) with mean number of NSV equals 6—11 (depending on station). Some modern receivers ar...
"GLONASS Interface Control Document, Navigational radio signal in bands L1, L2 (Edition 5.1)" (PDF) (in Russian). Russian Space Systems OJSC. 2008. Archived from the original (PDF) on 21 October 20...
GLONASS Interface Control Document, Edition 5.1, 2008 (backup)GLONASS Interface Control Document, Version 4.0, 1998"ФЕДЕРАЛЬНАЯ ЦЕЛЕВАЯ ПРОГРАММА "ГЛОБАЛЬНАЯ НАВИГАЦИОННАЯ СИСТЕМА", FEDERAL SPECIAL-PURPOSE PROGRAM "GLOBAL NAVIGATION SYSTEM"" (in Russian). Russian Federal Government. 20 August 2001. Archived fro..."GLONASS constellation status for 18.01.08 under the analysis of the almanac and accepted in IANC (UTC)". Russian Space Agency (RSA). Archived from the original on 24 October 2007. Retrieved 18 Jan...Satellite navigation is a system that uses satellites to provide geolocation and time information to a receiver on Earth. GNSS is a term that refers to the global navigation satellite systems that operate worldwide, such as GPS, GLONASS, Galileo and BeiDou. Learn more about the history, technology and applications of satellite navigation from this Wikipedia article.
Google Earth. Google Earth is a computer program that renders a 3D representation of Earth based primarily on satellite imagery. The program maps the Earth by superimposing satellite images, aerial photography, and GIS data onto a 3D globe, allowing users to see cities and landscapes from various angles. Users can explore the globe by entering ...
GPX, or GPS Exchange Format, is an XML schema designed as a common GPS data format for software applications. It can be used to describe waypoints, tracks, and routes. It is an open format [2] and can be used without the need to pay license fees. Location data (and optionally elevation, time, and other information) is stored in tags and can be ...
Hkakabo Razi ( Burmese: ခါကာဘိုရာဇီ, pronounced [kʰàkàbò ɹàzì]; simplified Chinese: 开加博峰; traditional Chinese: 開加博峯; pinyin: Kāijiābó Fēng) is believed to be Myanmar 's highest mountain. The 5,881-meter (19,295 ft)-tall mountain is the highest mountain in Southeast Asia as well. It is located in ...
