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Avionics device for satellite communication
A satellite data unit (SDU) is an avionics device installed in an aircraft that allows air/ground communication via a satellite network. It is an integral
Satellite_data_unit
Artificial satellite that relays radio signals
NewSpace Reconnaissance satellite Relay (disambiguation) Satcom On The Move Satellite data unit Satellite delay Satellite modem Satellite space segment Space
Communications_satellite
Satellite-provided Internet
grade satellite Internet service is typically provided to individual users through geostationary satellites that can offer relatively high data speeds
Satellite_Internet_access
Overview of MH370's satellite-transmitted messages
aircraft left the range of radar coverage—at 2:25—the aircraft's satellite data unit (SDU) transmitted a log-on message, which investigators believe occurred
Malaysia Airlines Flight 370 satellite communications
Malaysia_Airlines_Flight_370_satellite_communications
American satellite communications company
satellites: 66 are active satellites and the remaining fourteen function as in-orbit spares. Iridium Satellites are used for worldwide voice and data
Iridium_Communications
2014 aircraft disappearance
voice, fax and data links using other protocols. The aircraft uses a satellite data unit (SDU) to send and receive signals over the satellite communications
Malaysia_Airlines_Flight_370
Type of parabolic antenna
communication satellite. The term most commonly means a dish which receives direct-broadcast satellite television from a direct broadcast satellite in geostationary
Satellite_dish
Global satellite telecommunications company
telecommunications company that operates a satellite constellation in low Earth orbit (LEO) for satellite phone, low-speed data transmission and Earth observation
Globalstar
UAE-based satellite telecommunications company
network delivers voice and data services. Thuraya is the mobile satellite services subsidiary of Yahsat, a global satellite operator based in the United
Thuraya
American company (1929–2018)
L-band satellite data unit, also called SwiftBroadband (SBB) by operator Inmarsat ARINC 791 defines a first generation of Ku and Ka band satellite data airborne
ARINC
US weather satellite series
Environmental Satellite (GOES), operated by the United States' National Oceanic and Atmospheric Administration (NOAA)'s National Environmental Satellite, Data, and
Geostationary Operational Environmental Satellite
Geostationary_Operational_Environmental_Satellite
Satellite radio service owned by SiriusXM
Sirius Satellite Radio was a satellite radio (SDARS) service that operated in the United States and Canada. Sirius launched in 2002, and primarily competed
Sirius_Satellite_Radio
British satellite communications company
Inmarsat is a British satellite telecommunications company, offering mobile services to most of the globe. It provides telephone and data services via portable
Inmarsat
Topics referred to by the same term
Sdu or SDU may refer to: Satellite Data Unit, a part of a satellite telecommunication system for aircraft Service Data Unit, a telecommunications term
SDU
Satellite communication system with small dish antenna
narrowband data (e.g., point-of-sale transactions using credit cards, polling or RFID data, or SCADA), or broadband data (for the provision of satellite Internet
Very-small-aperture_terminal
Images taken from an artificial satellite
Satellite images (also Earth observation imagery, spaceborne photography, or simply satellite photo) are images of Earth collected by imaging satellites
Satellite_imagery
Communication protocol for satellite receivers
Digital Satellite Equipment Control (DiSEqC) (/ˈdaɪsɛk, daɪˈsɛksi/[citation needed]) is a communication protocol between a satellite receiver and a device
DiSEqC
aircraft's satellite datalink, which was lost sometime between 01:07 and 02:03, was re-established. Thereafter, the aircraft's satellite data unit (SDU) replied
Timeline of Malaysia Airlines Flight 370
Timeline_of_Malaysia_Airlines_Flight_370
SpaceX satellite Internet constellation
tested in late 2020. The satellites are mass-produced, at a much lower cost per unit of capability than previously existing satellites. Musk said, "We're going
Starlink
US classification for digital radio services
the U.S. and Canada is SDARS (Satellite Digital Audio Radio Service), used by Sirius Satellite Radio and XM Satellite Radio. XM and Sirius both operate
Digital_audio_radio_service
from the original (PDF) on 10 July 2011. Retrieved 11 January 2011. "A world first: data transmission between European satellites using laser light".
List of communications satellite firsts
List_of_communications_satellite_firsts
Device using satellite navigation to determine geolocation
connected to. It uses a Global Navigation Satellite System (GNSS) to determine its geographic position. This location data, along with other vehicle or asset
GPS_tracking_unit
sensors, and uses unique satellite identification data and an integrated DVB decoder to aid in identification of the satellite that it is pointing at.
Automatic-tracking satellite dish
Automatic-tracking_satellite_dish
American weather satellite (2002–2013)
operational, polar orbiting, weather satellite series (NOAA K-N) operated by the National Environmental Satellite Service (NESS) of the National Oceanic
NOAA-17
Universal Satellites Automatic Location System (USALS), also known (unofficially) as DiSEqC 1.3, Go X or Go to XX is a satellite dish motor protocol that
Universal Satellites Automatic Location System
Universal_Satellites_Automatic_Location_System
Czech Earth observation satellite
CubeSat-type satellite developed by the Brno-based company TRL Space. The satellite carries a hyperspectral imaging camera and a data processing unit for on-orbit
TROLL_(satellite)
American weather satellite (2005–2025)
NOAA-18 is the first NOAA POES satellite to use Microwave Humidity Sounder (MHS) in place of Advanced Microwave Sounding Unit (AMSU-B). The AVHRR/3 on the
NOAA-18
Aircraft digital message communication system
a digital data communication system for transmission of short messages between aircraft and ground stations via airband radio or satellite. The protocol
ACARS
Type of communications satellite
high-throughput satellite (HTS) is a communications satellite which provides more throughput than a classic fixed service satellite (FSS). An HTS provides
High-throughput_satellite
Extension of DVB-S2
DVB-S2X is a digital satellite television broadcast standard. DVB-S2X is an extension of DVB-S2 satellite digital broadcasting standard. It was standardized
DVB-S2X
Satellite navigation system
also used data from the satellite for precise ship's location information prior to positioning its tracking radars. The Transit satellite system, sponsored
Transit (satellite navigation system)
Transit_(satellite_navigation_system)
Device to deduce location from satellite signals
units, against the sale of only 40 million standalone GNSS receivers. Assisted GPS (A-GPS) uses a combination of satellite data and cell tower data to
Satellite_navigation_device
American weather satellite (2009–2025)
particles at satellite altitude. The SEM-2 consists of two separate sensor units and a common Data Processing Unit (DPU). The sensor units are the Total
NOAA-19
Satellite ground station operated by the U.S. National Reconnaissance Office
Aerospace Data Facility-Colorado (ADF-C) or Space Delta 20 (DEL 20) or Consolidated Denver Mission Ground Station (CDMGS) one of three satellite ground stations
Aerospace Data Facility-Colorado
Aerospace_Data_Facility-Colorado
Satellite navigation system
March 2026, only three satellites of the constellation were providing navigation data, below a minimum number of four satellites required for an accurate
Indian Regional Navigation Satellite System
Indian_Regional_Navigation_Satellite_System
Use of satellite signals for navigation or geo-spatial positioning
Satellite navigation (satnav) or satellite positioning is the use of satellites for navigation or geopositioning. A global navigation satellite system
Satellite_navigation
Satellite constellation providing voice and data coverage
The Iridium satellite constellation provides L band voice and data information coverage to satellite phones, satellite messenger communication devices
Iridium satellite constellation
Iridium_satellite_constellation
Satellite TV reception via a local area network
cables to one or more satellite tuners and demodulators in set-top boxes. SAT>IP allows the satellite TV distribution to share a data network and enables
Sat-IP
Obtaining information through non-contact sensors
Analysis-ready data is a form of satellite data which has been pre-processed for immediate data analysis, such as data cubes for time series analysis. Satellite images
Remote_sensing
Series of Canadian satellites by Telesat
The Anik satellites are a series of geostationary communications satellites launched for Telesat Canada for television, voice and data in Canada and other
Anik_(satellite)
American weather satellite (1998–2025)
NASA-provided Television Infrared Observation Satellite (TIROS) series weather forecasting satellite operated by National Oceanic and Atmospheric Administration
NOAA-15
Robust aircraft electronic recording device
Another form of flight data recorder was developed in the UK during World War II. Len Harrison and Vic Husband developed a unit that could withstand a
Flight_recorder
Series of American terrestrial radar imaging reconnaissance satellites
purpose[specify]. Early versions are believed to have used the Tracking and Data Relay Satellite System (TDRSS) to relay imagery to a ground station at White Sands
Lacrosse_(satellite)
American satellite-based radio navigation service
The Global Positioning System (GPS) is a satellite-based hyperbolic navigation system owned by the United States Space Force and operated by Mission Delta
Global_Positioning_System
Technology development overview
image data across multiple electromagnetic spectrum ranges Multispectral Unit for Land Assessment – Future Filipino Earth observations satellite Suomi
Outline of artificial satellites
Outline_of_artificial_satellites
Military unit
voice and data communications to the warfighter.[who?] The group provides operations and sustainment support for the on-orbit Defense Satellite Communications
Military Satellite Communications Directorate
Military_Satellite_Communications_Directorate
Dutch mini-satellite
Delfi-C3 is a CubeSat satellite constructed by students at the Delft University of Technology in the Netherlands. It is a 3-unit CubeSat, and was launched
Delfi-C3
First satellite launched by the United States (1958)
returning data until its batteries were exhausted after nearly four months. It remained in orbit until 1970. Explorer 1 was given Satellite Catalog Number
Explorer_1
Ukrainian satellite
entrepreneur Max Polyakov, founder of EOS Data Analytics, was involved in negotiations due to his expertise in the satellite market. In March 2022, at the beginning
People's_Satellite
UK-based online weather service
broadcast services and data from airport weather stations, on-ground radar stations, weather satellites, remote sensing satellites, METAR, and automated
OpenWeatherMap
Unit of length
during interviews or discussions on TV when sent over satellite. The light-second is a convenient unit for measuring distances in the inner Solar System,
Light-second
American weather satellite (2000-2014)
operational, polar orbiting, weather satellite series (NOAA K-N) operated by the National Environmental Satellite Service (NESS) of the National Oceanic
NOAA-16
American communications company
developing new technologies for extremely bandwidth efficient, high data rate satellite transmission. In 2001, Viasat also purchased US Monolithics, a company
Viasat_(American_company)
Former satellite radio company
unit called the American Mobile Radio Corporation dedicated to developing a satellite-based digital radio service; this was spun off as XM Satellite Radio
XM_Satellite_Radio
Space-to-cloud data and analytics company
Global Navigation Satellite System Radio Occultation (GNSS-RO) payload, enabling the company to constantly collect highly accurate data on local atmospheric
Spire_Global
Japanese biological and chemical warfare research facility (1936–1945)
bubonic plague bacteria could be produced in a few days. Some of Unit 731's satellite (branch) facilities are still in use by various Chinese industrial
Unit_731
First artificial Earth satellite
ˈspʊtnɪk/, Russian: Спутник-1, Satellite 1), often referred to as simply Sputnik, was the first artificial Earth satellite. It was launched into an elliptical
Sputnik_1
Military doctrinal concept
the satellite-based ISR task as of 2021. See Space Delta 7 From 2018, the NGA has used Data transformation services (DTS), to convert raw sensor data into
Intelligence, surveillance, target acquisition, and reconnaissance
Intelligence,_surveillance,_target_acquisition,_and_reconnaissance
NASA scientific research satellite (2002–present)
Aqua (EOS PM-1) is a NASA scientific research satellite in orbit around the Earth, studying the precipitation, evaporation, and cycling of water. It is
Aqua_(satellite)
Satellites of low mass and size, usually under 1200 kg
small satellite, miniaturized satellite, or smallsat is a satellite of low mass and size, usually under 1,200 kg (2,600 lb). While all such satellites can
Small_satellite
Tracking system using transceivers on ships
of this data is free of charge but satellite data and special services such as searching the archives are usually supplied at a cost. The data is a read-only
Automatic identification system
Automatic_identification_system
Space warfare arm of the People's Liberation Army
Xichang Quality Supervision Station (西昌质量监督站) Jiuquan Satellite Launch Center (中国酒泉卫星发射中心), MUCD: unit 63600 (a.k.a. Dongfeng Base or Dongfeng Aerospace City)
People's Liberation Army Aerospace Force
People's_Liberation_Army_Aerospace_Force
Television term
interact with the unit. When the user found a show they wanted to watch, they would have to turn off the guide and then tune the satellite receiver to the
Electronic_program_guide
Device or series of devices that receive, then transmit (relay) a signal
A communications satellite's transponder is the series of interconnected units that form a communications channel between the receiving and the transmitting
Transponder (satellite communications)
Transponder_(satellite_communications)
Software used for GPS navigation
Satellite navigation software or GNSS navigation software a category of software that provide positioning services by utilizing data from satellite navigation
Satellite_navigation_software
Satellite provider
Viasat is a satellite and pay television brand, founded in Sweden in 1991. The brand was previously owned by Modern Times Group (MTG). The channels of
Viasat (Nordic television service)
Viasat_(Nordic_television_service)
Amazon satellite constellation and internet service
Leo, is a subsidiary of Amazon established in 2019 to deploy a large satellite internet constellation providing low-latency broadband connectivity. The
Amazon_Leo
Satellite navigation technique used to enhance the precision of position data
the application of surveying to correct for common errors in current satellite navigation (GNSS) systems. It uses measurements of the phase of the signal's
Real-time kinematic positioning
Real-time_kinematic_positioning
Atmospheric layer temp deduced from oxygen radiance
different groups that have analyzed the satellite data have obtained different temperature data (see Microwave Sounding Unit temperature measurements). Among
UAH satellite temperature dataset
UAH_satellite_temperature_dataset
Signals broadcast by GPS satellites
used to measure the distance to the satellite, and navigation messages. The navigation messages include ephemeris data which are used both in trilateration
GPS_signals
Satellite manufacturing division of Boeing
The Boeing Satellite Development Center is a major business unit of Boeing Defense, Space & Security. It brought together Boeing satellite operations
Boeing Satellite Development Center
Boeing_Satellite_Development_Center
U.S. Space Force unit
Space Command's only multi-mission Satellite Operations Control Center. 1 SOPS is supported by the Air Force Reserves unit, the 7th Space Operations Squadron
1st_Space_Operations_Squadron
NASA Earth observation satellite (2004–present)
Aura (EOS CH-1) is a multi-national NASA scientific research satellite in orbit around the Earth, studying the Earth's ozone layer, air quality and climate
Aura_(satellite)
American telecommunications company
aeronautical communities, and offers data, voice, fax, telex and video capabilities via the Inmarsat geosynchronous satellite constellation through two earth
COMSAT_Mobile_Communications
Finnish microsatellite manufacturer
Rheinmetall ICEYE Space Solutions, signed a contract with Germany for radar satellite data services valued at 1.76 billion euros, with options that could increase
ICEYE
Joint American-German space mission to map Earth's gravitational field
distributed around the planet and how it varies over time. Data from the GRACE satellites is an important tool for studying Earth's ocean, geology, and
GRACE_and_GRACE-FO
Computerized units used to generate local weather information over The Weather Channel
the TWC video feed and from data transmitted via satellite; the localized data is then sent to the unit that inserts the data and accompanying programmed
WeatherStar
Commercial fishing tracking system
require expensive onboard equipment and large amounts of data to be transmitted over satellite link resulting in high airtime charges, but also provide
Vessel_monitoring_system
Facility used to house computer servers
A data center is a physical room, building, or facility for the purpose of the storage, management, and dissemination of data and information, including
Data_center
Indian technology demonstration and remote sensing satellite
damaged. Inertial Measurement Unit (IMU) system is used to measure vibrations in the satellite and angular rate of the satellite which is used to test the
Jugnu_(satellite)
Onboard embedded system for vehicle telematics and connectivity
that manage data collection and communication. GNSS receiver: This component provides automatic vehicle location by connecting to satellite constellations
Telematic_control_unit
Series of multipurpose geo-stationary satellites launched by ISRO
The Indian National Satellite System or INSAT, is a series of multipurpose geostationary satellites launched by ISRO to satisfy telecommunications, broadcasting
Indian National Satellite System
Indian_National_Satellite_System
American radio broadcasting corporation
unit called the American Mobile Radio Corporation, dedicated to developing a satellite-based digital radio service; this was spun off as XM Satellite
SiriusXM
Automatic collection and transmission of data
Telemetering. Data collection satellite Instrumentation Machine to Machine (M2M) MQ Telemetry Transport (MQTT) Portable telemetry Reconnaissance satellite, tapping
Telemetry
Japanese spacecraft
materials and research data that held value to NASA. The crew of STS-72 aboard Space Shuttle Endeavour retrieved the satellite on January 20, 1996, 10
Space_Flyer_Unit
Type of American spy satellite
system transmits its imagery as data through the Satellite Data System (SDS), a network of communications satellites. These digital images were initially
KH-11_KENNEN
First successful North Korean satellite
long range rocket Kwangmyŏngsŏng-3 Unit 2 (Korean: 《광명성―3》호 2호기; lit. 'Lodestar-3 Unit 2') was the first satellite successfully launched from North Korea
Kwangmyŏngsŏng-3_Unit_2
Dutch government organisation
operational on June 15, 2014. JSCU's primary tasks are intercepting radio and satellite traffic (Sigint) and obtaining intelligence through cyber-operations.
Joint_Sigint_Cyber_Unit
Israeli public company
of satellites for data communications, hired their services to design a Very Small Aperture Terminal (VSAT), a tiny base station for two-way data communication
Gilat_Satellite_Networks
Imaging satellite
channels. Each image produces 7 GB of data, however, thanks to the KP Labs-developed Leopard unit in the satellite running Oryx software, and Herd algorithms
Intuition-1
Scientific practice
optional environmental sensors or automated data-retrieval technologies such as Argos satellite uplink, mobile data telephony or GPRS and a range of analytical
GPS_animal_tracking
American weather satellite
weather satellite operated by the National Oceanic and Atmospheric Administration (NOAA) for use in the National Environmental Satellite Data and Information
NOAA-10
Unit of the United States Space Force
SkyNet IV (1993–1995) Inertial Upper Stage (1993–1995) Tracking and Data Relay Satellite X-37B Orbital Test Vehicle (2024–present) Endicott, p. 364 Robertson
5th_Space_Operations_Squadron
Azimuth-Elevation unit controlling the parabolic dish. As an alternative to receiving direct broadcast from polar orbiting satellites, users in Europe
High-resolution picture transmission
High-resolution_picture_transmission
Israeli military intelligence
In 2025, the unit was instrumental in Operation Roaring Lion, the IDF's strikes on Iran. They directed Israel's intelligence satellites to obtain images
Unit_9900
U.S. government AI system
enabling coordinated retasking of reconnaissance satellites without human input. Using multimodal intelligence data—from imagery and signals to communications
Sentient (intelligence analysis system)
Sentient_(intelligence_analysis_system)
Geostationary communication satellites
launch vehicles fitted with a fourth stage propulsion unit are capable of launching the satellites several thousand kilometres higher (at the closest point
Astra_(satellite)
Strategies for managing commercial vehicles
management software application. Methods for data transmission include both terrestrial and satellite. Satellite tracking communications, while more expensive
Fleet_management
Earth observation satellite
Copernicus Programme satellite constellations for Earth observation operated by the European Space Agency (ESA). Data collected via the satellites are used e.g
Sentinel-1
U.S. federal agency
space-based missile tracking using large global satellite constellations made up of industry-procured low-cost satellites. The SDA has been managed by the United
Space_Development_Agency
SATELLITE DATA-UNIT
SATELLITE DATA-UNIT
Female
Hindi/Indian
(लता) Hindi name derived from a plant name, from the Sanskrit word lata, LATA means "creeper," in reference to a creeping plant.
Female
Finnish
 Short form of Finnish Katariina, KATA means "pure." Compare with other forms of Kata.
Female
Polish
 Variant spelling of Polish Dyta, DITA means "rich battle." Compare with another form of Dita.
Girl/Female
Muslim
Satellite.
Female
English
 English surname transferred to unisex forename use, possibly DANA means "from Denmark." Compare with other forms of Dana.
Girl/Female
Muslim
Satellite, Star
Female
Slavic
 Short form of Slavic Bogdana, DANA means "gift from God." Compare with other forms of Dana.
Female
Hebrew
(×“Ö¼Ö¸× Ö¸×”) Feminine form of Hebrew Dan, DANA means "judge." Compare with other forms of Dana.
Male
Irish
 From Irish Gaelic Mac Dara, DARA means "son of oak." Compare with other forms of Dara.
Girl/Female
Indian
Satellite, Star
Female
Russian
 Short form of Russian Yekaterina, KATA means "pure." Compare with other forms of Kata.
Female
English
 Middle English name DARA means "brave, daring." Compare with another form of Dara.
Female
Hungarian
 Short form of Hungarian Katalin, KATA means "pure." Compare with other forms of Kata.
Male
English
English surname transferred to unisex forename use, possibly DANA means "from Denmark."
Male
Turkish
Turkish name ATA means "ancestor."
Male
Iranian/Persian
 Short form of Persian Dârayavahush, DARA means "possesses a lot, wealthy." Compare with other forms of Dara.
Female
Polish
Short form of Polish Edyta, DYTA means "rich battle."
Female
Finnish
Variant form of Finnish Aada, AATA means "noble."
Male
Hebrew
Variant spelling of Hebrew Dathan, DATAN means "belonging to a fountain."
Female
Hebrew
(דִּיתָה) Pet form of Hebrew Yehuwdiyth, DITA means "Jewess" or "praised." Compare with another form of Dita.
SATELLITE DATA-UNIT
SATELLITE DATA-UNIT
Girl/Female
Indian, Kashmiri, Sanskrit
Loving
Boy/Male
Tamil
From the Vedas
Girl/Female
Hebrew
Light.
Girl/Female
Arabic, Muslim
Mother of Favour; Bounty
Male
Russian
(Викентий) Russian form of Latin Vincentius, VIKENTIY means "conquering."
Girl/Female
Hindu, Indian
Goodness
Boy/Male
Australian, Celtic, Irish
Yew
Girl/Female
Muslim/Islamic
Singularity
Girl/Female
American, Danish, French, German, Greek, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Modern, Russian, Sanskrit, Sindhi, Tamil, Telugu, Ukrainian
Of the Family; Fairy Princess; Beautiful Eyes
Boy/Male
African, American, Australian, British, Celebrity, Chinese, Christian, Czechoslovakian, Danish, Dutch, English, Finnish, French, German, Greek, Hawaiian, Hebrew, Hindu, Indian, Irish, Jamaican, Japanese, Malayalam, Netherlands, Polish, Portuguese, Shakesp
God is Merciful; Gift of God; God is Gracious; By the Grace of God
SATELLITE DATA-UNIT
SATELLITE DATA-UNIT
SATELLITE DATA-UNIT
SATELLITE DATA-UNIT
SATELLITE DATA-UNIT
p. pr. & vb. n.
of Date
pl.
of Datum
n.
A hydrous phosphate of alumina, occurring usually in hemispherical radiated forms varying in color from white to yellow, green, or black.
n.
The point of time at which a transaction or event takes place, or is appointed to take place; a given point of time; epoch; as, the date of a battle.
n.
A secondary planet which revolves about another planet; as, the moon is a satellite of the earth. See Solar system, under Solar.
v. t.
To note or fix the time of, as of an event; to give the date of; as, to date the building of the pyramids.
n.
A little moon or satellite.
imp. & p. p.
of Date
n.
A satellite.
a.
Pertaining to, or consisting of, satellites.
n.
That addition to a writing, inscription, coin, etc., which specifies the time (as day, month, and year) when the writing or inscription was given, or executed, or made; as, the date of a letter, of a will, of a deed, of a coin. etc.
a.
Situated near; accompanying; as, the satellite veins, those which accompany the arteries.
n.
An attendant attached to a prince or other powerful person; hence, an obsequious dependent.
a.
Minutely stellate.
n. pl.
See Datum.
v. t.
To date erroneously.
v. t.
To note the time of writing or executing; to express in an instrument the time of its execution; as, to date a letter, a bond, a deed, or a charter.
n.
The fruit of the date palm; also, the date palm itself.
n.
Prior date; a date antecedent to another which is the actual date.
n.
One of the moons or satellites of the planet Jupiter.