orbits top-level property
getter/setter pair
List of orbits
Implementation
List<Orbit> orbits = [
Orbit(
id: 'walker_constellation',
orbitName: 'Walker Constellation',
satelliteName: 'Starlink',
orbitDescription:
'''Constellations are a group of satellites working in unison to complete a mission objective. A Walker constellation consists of either a plane or multiple planes where each plane contains several satellites spaced in different locations.\n\nUnlike a single satellite, a constellation can provide permanent global or near-global coverage, such that at any time everywhere on Earth at least one satellite is visible. Satellites are typically placed in sets of complementary orbital planes and connect to globally distributed ground stations. They may also use inter-satellite communication.''',
satelliteDescription:
'''Starlink is a satellite internet constellation operated by Starlink, providing coverage to 80 countries. It also aims to provide global mobile broadband.\n\nSpaceX started launching Starlink satellites in 2019. It consists of over 6,000 mass-produced small satellites in low Earth orbit (LEO) that communicate with designated ground transceivers.''',
startDate: DateTime.utc(2024, 7, 13, 0, 0, 0),
endDate: DateTime.utc(2024, 7, 14, 6, 0, 0),
),
Orbit(
id: 'graveyard',
orbitName: 'Graveyard',
orbitDescription:
'''A graveyard orbit, also called a junk orbit or disposal orbit, is an orbit that lies away from common operational orbits. Some satellites are moved into such orbits at the end of their operational life to reduce the probability of colliding with operational spacecraft and generating space debris.\n\nA graveyard orbit has an altitude of 36,050 km above the Earth's surface, which is higher than most common operational orbits.''',
),
Orbit(
id: 'gps',
orbitName: 'Gps',
satelliteName: 'Navstar 81',
orbitDescription:
'''The Global Positioning System (GPS), is a popular satellite navigation system. A constellation of more than two dozen GPS satellites broadcasts precise timing signals by radio, allowing any GPS receiver to accurately determine its location (longitude, latitude, and altitude) in any weather, day or night, anywhere on Earth.''',
satelliteDescription:
'''Navstar 81 is a satellite within the Global Positioning System (GPS) constellation, which is used for navigation and timing purposes.\n\nLaunched as part of the U.S. Air Force's Navstar GPS program, it helps provide precise location and time information to users worldwide''',
line1:
'1 48859U 21054A 24197.22404030 -.00000080 00000-0 00000-0 0 9993',
line2:
'2 48859 55.3663 0.6141 0015881 217.9724 294.8966 2.00556631 22670',
startDate: DateTime.utc(2024, 7, 13, 0, 0, 0),
endDate: DateTime.utc(2024, 7, 14, 0, 0, 0),
period: 718,
),
Orbit(
id: 'sun_synchronous',
orbitName: 'Sun synchronous',
satelliteName: 'TERRA',
orbitDescription:
'''A Sun synchronous orbit (SSO), also known as a heliosynchronous orbit, is a type of orbit around a planet where the satellite passes over the same point on the planet's surface at the same local time each day.\n\nThis means that the satellite's orbit is aligned in such a way that it keeps a consistent position relative to the Sun, completing one full revolution each year.''',
satelliteDescription:
'''TERRA (EOS AM-1) is a multi-national NASA scientific research satellite in a Sun-synchronous orbit around the Earth. It is the flagship of the Earth Observing System (EOS). The name "TERRA" comes from the Latin word for Earth.\n\nData from the satellite helps scientists better understand the spread of pollution around the globe. Studies have used instruments on TERRA to examine trends in global carbon monoxide and aerosol pollution. The data collected by TERRA will ultimately become a new, 15-year global data set.''',
line1:
'1 25994U 99068A 24199.17757701 .00000916 00000-0 20077-3 0 9996',
line2:
'2 25994 98.0466 261.7833 0000592 259.3028 159.9552 14.59865961307548',
startDate: DateTime.utc(2024, 7, 13, 0, 0, 0),
endDate: DateTime.utc(2024, 7, 14, 0, 0, 0),
period: 98.6,
),
Orbit(
id: 'qzss',
orbitName: 'QZSS',
orbitDescription:
'''The Quasi-Zenith Satellite System (QZSS), also known as Michibiki (みちびき), which means 'guiding' or 'showing the way' in Japanese, is a four-satellite regional navigation and augmentation system developed by the Japanese government. Its purpose is to enhance the United States-operated Global Positioning System (GPS) in the Asia-Oceania regions, with a particular focus on Japan.\n\nThe goal of QZSS is to provide highly precise and stable positioning services in the Asia-Oceania region, ensuring compatibility with GPS.''',
satelliteName: 'QZS-4',
satelliteDescription:
'''QZS-4 (MICHIBIKI-4) is the fourth member of Japan's regional satellite navigation network, conceived to improve GPS coverage over Japanese territory.\n\nThe satellite is designed for a 15-year service life in an orbit inclined approximately 41 degrees to the equator.''',
line1:
'1 42965U 17062A 24176.78903547 -.00000324 00000-0 00000+0 0 9994',
line2:
'2 42965 40.5115 352.6916 0746082 271.6310 68.9097 1.00249876 24566',
startDate: DateTime.utc(2024, 7, 13, 0, 0, 0),
endDate: DateTime.utc(2024, 7, 14, 0, 0, 0),
period: 1436.1,
centerLatitude: -0.5383416030147427,
centerLongitude: 140.83900339901447,
),
Orbit(
id: 'molniya',
orbitName: 'Molniya',
satelliteName: 'Molniya 1-91',
orbitDescription:
'''Molniya ("lightning") was a military communications satellite system used by the Soviet Union. The satellites used highly eccentric elliptical orbits of +63.4 degrees inclination and orbital period of about 12 hours, which allowed them to be visible to polar regions for long periods.\n\nA total of 53 Molniya 3 series satellites were launched, with the last one going up in 2003''',
satelliteDescription:
'''The Molniya 1-91 satellite is designed to broadcast television and support both military and manned voice communications.\n\nIt operates in a highly elliptical orbit, making it ideal for coverage in northern latitudes that geostationary satellites cannot reach.''',
line1:
'1 25485U 98054A 24197.57245347 -.00000119 00000-0 00000-0 0 9992',
line2:
'2 25485 64.0514 31.0389 6823104 290.3483 11.9446 2.36440834196985',
startDate: DateTime.utc(2024, 7, 13, 0, 0, 0),
endDate: DateTime.utc(2024, 7, 13, 21, 0, 0),
period: 609,
),
Orbit(
id: 'iss',
orbitName: 'Iss',
orbitDescription:
'''The International Space Station (ISS) is a joint project of five space agencies: the National Aeronautics and Space Administration (United States), the Russian Federal Space Agency (Russian Federation), the Japan Aerospace Exploration Agency (Japan), the Canadian Space Agency (Canada) and the European Space Agency (Europe)\n\nThere is an approximate repeat of orbit tracks over the same area on the ground every 3 days. The ISS was originally intended to be a laboratory, observatory, and factory while providing transportation and maintenance. However, not all of the uses envisioned in the initial memorandum of understanding between NASA and Roscosmos have been realised. In the 2010 United States National Space Policy, the ISS was given additional roles of serving commercial, diplomatic and educational purposes. \n\nThe ISS is expected to remain in operation until at least 2020, and potentially to 2028.''',
line1:
'1 25544U 98067A 24207.39188981 .00018073 00000-0 32052-3 0 9996',
line2:
'2 25544 51.6402 126.0588 0010177 104.8575 1.8008 15.50254702464479',
startDate: DateTime.utc(2024, 7, 12, 0, 0, 0),
endDate: DateTime.utc(2024, 7, 15, 0, 0, 0),
period: 92.9,
),
Orbit(
id: 'tundra',
orbitName: 'Tundra',
satelliteName: 'COSMOS 2546',
orbitDescription:
'''Tundra orbits are a special type of geosynchronous orbit and are highly inclined. They are also elliptical so they spend more time in the northern hemisphere. They are very similar to the Molniya orbit.\n\nCommon Uses and Benefits: Hangs over the northern hemisphere, communications A satellite placed in this orbit spends most of its time over a chosen area of the Earth''',
satelliteDescription:
'''COSMOS 2546 is a Russian missile warning satellite and is likely the fourth EKS (Tundra) satellite. The new generation of EKS satellites replace Russia’s Oko series of missile warning spacecraft, the last of which launched in 2012.\n\nThe EKS satellites are designed to detect missile launches using infrared sensors and provide early warning of ballistic missile attacks against Russia.''',
line1:
'1 45608U 20031A 24197.66457227 .00000127 00000-0 00000-0 0 9991',
line2:
'2 45608 63.1076 147.0944 6712105 265.0384 21.5227 2.00614110 30396',
startDate: DateTime.utc(2024, 7, 13, 0, 0, 0),
endDate: DateTime.utc(2024, 7, 14, 0, 0, 0),
period: 717.8,
),
Orbit(
id: 'flower',
orbitName: 'Flower',
satelliteName: 'GALILEO 5',
orbitDescription:
'''The flower orbit, a fascinating concept in the realm of astrodynamics, describes a specific type of satellite trajectory around a celestial body, often Earth. Named for its resemblance to the petals of a flower when viewed from above, this orbital pattern serves as an elegant solution for various satellite missions, particularly in Earth observation and remote sensing.\n\nA defining feature of the flower orbit is its symmetric, petal-like pattern. This symmetry arises from the satellite's path, which repeatedly brings it over the poles and equator of the planet.''',
satelliteDescription:
'''GSAT0105 (GALILEO 5) is one of the 2 satellites for Europe's Galileo navigation network released on August 22, 2014 into the wrong orbit after launching aboard a Soyuz rocket from French Guiana.''',
line1:
'1 40128U 14050A 24198.73197654 -.00000075 00000-0 00000-0 0 9994',
line2:
'2 40128 49.6293 301.8772 1612272 152.4131 217.1966 1.85519541 65323',
startDate: DateTime.utc(2024, 7, 1, 0, 0, 0),
endDate: DateTime.utc(2024, 7, 21, 0, 0, 0),
period: 776.2,
),
Orbit(
id: 'vleo',
orbitName: 'Very Low Earth',
satelliteName: 'Tsubame',
orbitDescription:
'''Very Low Earth Orbit (VLEO) is typically situated at an altitude of between 250-350 kilometers. It offers the advantage of being closer to Earth than the traditional orbit of satellites, enabling higher resolution images from optical sensors, improved communications, and greater agility.\n\nVLEO is safer from collisions with space debris because objects in these orbits eventually burn up as they re-enter the Earth's atmosphere. However, satellites operating at such low altitudes must withstand surface erosion caused by atomic oxygen, necessitating the use of more durable materials.''',
satelliteDescription:
'''Tsubame is a satellite developed by the Tokyo Institute of Technology designed to test gyroscopes for pointing control while conducting X-ray astronomy observations and demonstrate a compact camera to look down on Earth.''',
line1:
'1 40302U 14070E 24202.19084774 .00076823 00000-0 10425-2 0 9991',
line2:
'2 40302 97.1068 209.0045 0013898 2.8929 357.2405 15.57275034538383',
startDate: DateTime.utc(2024, 7, 14, 0, 0, 0),
endDate: DateTime.utc(2024, 7, 16, 0, 0, 0),
period: 92.5,
),
Orbit(
id: 'geostationary',
orbitName: 'Geostationary',
satelliteName: 'GOES-19',
orbitDescription:
'''A geosynchronous satellite is a satellite whose orbital track on the Earth repeats regularly over points on the Earth over time. If such a satellite's orbit lies over the equator, it is called a geostationary satellite.\n\nThe orbits of the satellites are known as the geosynchronous orbit and geostationary orbit''',
satelliteDescription:
'''GOES-19 is a weather satellite, the fourth and last of the GOES-R series of satellites operated by the National Oceanic and Atmospheric Administration (NOAA).\n\nThe GOES-R series will extend the availability of the Geostationary Operational Environmental Satellite (GOES) system until 2036. The satellite is built by Lockheed Martin, based on the A2100 platform.''',
line1:
'1 60133U 24119A 24199.90728219 -.00000227 00000-0 00000-0 0 9995',
line2:
'2 60133 0.1192 256.8790 0019714 192.4559 81.3331 1.01128782 315',
startDate: DateTime.utc(2024, 7, 14, 0, 0, 0),
endDate: DateTime.utc(2024, 11, 9, 0, 0, 0),
period: 1423.0,
),
Orbit(
id: 'meo',
orbitName: 'Medium Earth',
satelliteName: 'Galileo 15',
orbitDescription:
'''Medium earth orbit (MEO) refers to a specific region in space situated between Low Earth Orbit (LEO) and Geostationary Orbit (GEO). MEO satellites occupy an altitude range typically between 2,000 to 36,000 kilometres (1,243 to 22,300 miles) above the Earth’s surface.\n\nMEO satellites are commonly known for their significant role in global navigation systems.''',
satelliteDescription:
'''Galileo 15 is built in Germany with navigation payloads from Britain.\n\nThe Galileo satellites are part of a European Union program to provide global positioning services independent of the U.S. military-run Global Positioning System, Russia's Glonass network, and China's Beidou constellation. The Galileo network is designed to provide more accurate and reliable navigation services than other global positioning systems.''',
startDate: DateTime.utc(2024, 7, 13, 0, 0, 0),
endDate: DateTime.utc(2024, 7, 23, 1, 0, 0),
period: 844.7)
];