Planning mission timelines and sequencing of events, analyzing trade-offs between competing technical options and, defining flight rulesDetailed procedures for normal and contingency operations that operators and engineers created during the mission designDesign is an intricate process involving reviewing constraints, identifying and characterizing the mission subject, deriving the payload and orbital requirements, determining spacecraft mass, power and other detailed design requirements, identifying potential launch vehicles, deriving operations systems requirements and iterating. More, manufacture, and tests. They describe how every subsystemThe bus provides "housekeeping" functions necessary to make the payload work. Includes various subsystems that produce/distribute electrical power, maintain correct temperature, process and store data, communicate with other spacecraft and Earth-bound operators, control the spacecraft's orientation, and hold everything together. More should work and list the steps to take in every conceivable situation to save the […]
Read MoreNewton’s Second Law of MotionA rotating object’s spinA rotating object’s spin rate. We use the right-hand rule to determine its direction. More rate. We use the right-hand rule to determine its direction. More states that the timeThe timeThe time between successive passages of the Sun overhead, which is from noon one day to noon the next day. Because Earth’s orbit around the Sun is slightly elliptical, this time varies slightly during a year. More between successive passages of the SunWe use the angle of incidence, θ, to determine how much solar energy hits a solar panel. This angle lies between a line perpendicular to the cell and the Sun line. More overhead, which is from noon one dayThe time between successive passages of the Sun overhead, which is from noon one day to noon the next day. Because Earth’s orbit around the Sun is slightly elliptical, this time varies slightly during a year. More to noon the next dayThe time between successive passages of the Sun overhead, which is from noon one day to noon the next day. Because Earth’s orbit around the Sun is slightly elliptical, this time varies slightly during a year. More. Because Earth’s orbitThe oval-shaped path that a spacecraft follows. Orbits come in various shapes and sizes, but each one has a purpose: to let the spacecraft do its job. Higher orbits require more propellant to get a spacecraft there. More around the SunWe use the angle of incidence, θ, to determine how much solar energy hits a solar panel. This angle lies between a line perpendicular to the cell and the Sun line. More is slightly elliptical, this timeThe time between successive passages of the Sun overhead, which is from noon one day to noon the next day. Because Earth’s orbit around the Sun is slightly elliptical, this time varies slightly during a year. More varies slightly […]
Read MoreThe oval-shaped pathThe elliptical-shaped pathThe elliptical-shaped path a satellite takes in going from one circular orbit to another as part of a Hohmann Transfer. More a satellite takes in going from one circular orbitA circular orbit has no perigee. In this case, we have no argument of perigee, or true anomaly, because both use perigee as a reference. More to another as part of a Hohmann TransferThe minimum-energy maneuver to get from one circular orbit to another in the same plane. It uses a velocity change to get from the original orbit into a transfer orbit and another one to get out of the transfer orbit into the final orbit. More. More that a spacecraft follows. OrbitsThe study of the moving objects under the influence of gravityA projectile with a prescribed path that cannot be altered after it has burned its propellant and the laws of ballistics govern its course. When gravity is the only force on it, its path is elliptical. More from another body. Astrodynamicists designDesign is an intricate process involving reviewing constraints, identifying and characterizing the mission subject, deriving the payload and orbital requirements, determining spacecraft mass, power and other detailed design requirements, identifying potential launch vehicles, deriving operations systems requirements and iterating. More orbitsThe study of the moving objects under the influence of gravity from another body. Astrodynamicists design orbits and study how gravity affects them. More and study how gravityA projectile with a prescribed path that cannot be altered after it has burned its propellant and the laws of ballistics govern its course. When gravity is the only force on it, its path is elliptical. More affects them. More come in various shapes […]
Read MoreDefines a physically identifiable starting pointThe job of the attitude determination and control subsystemThe job of the attitude determination and control subsystem (ADCS) is to keep its spacecraft pointed in the right direction. More (ADCS) is to keep its spacecraft pointed in the right direction. More for the coordinate systemA frame of reference that engineers use as a foundation for describing an object’s motionA rotating object’s spin rate. We use the right-hand rule to determine its direction. More. Coordinate systems have a center pointThe job of the attitude determination and control subsystem (ADCS) is to keep its spacecraft pointed in the right direction. More (originDefines a physically identifiable starting point for the coordinate system. More), two or three axis […]
Read MoreThe release of trapped gases and evaporated material from spacecraft in orbit. The released gases can coat electronic surfaces and sensor lenses, causing electrical problems and blurred observations.
Read MoreUses a series of mathematical relationships that relate cost to physical, technical and performance parameters. Often most widely used in Space Industry due to cost of a detailed bottom-up estimate.
Read More80/20 rule, e.g. the last 20% of performance will consume 80% of the mission cost.
Read MoreA temporary orbitThe oval-shaped pathThe elliptical-shaped path a satellite takes in going from one circular orbit to another as part of a Hohmann Transfer. More that a spacecraft follows. Orbits come in various shapes and sizes, but each one has a purpose: to let the spacecraft do its job. Higher orbitsThe study of the moving objects under the influence of gravity from another body. Astrodynamicists design orbits and study how gravity affects them. More require more propellantA type of rocket system that heats a propellant by passing it through a sustained electric arc, then ejects the energized gas through a nozzle. Its specific impulse is high compared to chemical rockets, but its thrust is very low. More to get a spacecraft there. More for a spacecraft before transferring to its mission orbitThe oval-shaped path that a spacecraft follows. Orbits come in various shapes and sizes, but each one has a purpose: to let the spacecraft do its job. Higher orbits require more propellant to get a spacecraft there. More. A spacecraft may need checkout timeThe […]
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