AE 323 Quiz 2
Passive tracking
1 way sensing of objects through electrometric means (RF, Radars) (Optic, telescopes)
Advantages of Constellation Satellite
Better coverage, Smaller Size, Greater reliability.
Space-referenced Orbit
An Operational Orbit whose characteristic is somewhere in space,
transfer orbit
An orbit used to maneuver a satellite from LEO to GEO, Earth and Moon
Photometric Characterization
Characterizes Objects by how they Look
Astrometric Characterization
Characterizes Objects by how they Move
Challenges of space craft Launch
High vibrations and Noise, High Acceleration, Mechanical Shocks, Thermal Environment, Rapid loss in pressure.
Cromosphere
Few thousand Kilometers above Photosphere of sun responsible for ultraviolet emissions.
LEO
Low Earth Orbit Satellites and Space Debris
MEO
Medium Earth Orbit Global Positioning Systems(GPS)
Space Situational Awareness
Practice of identifying objects in space either globally or within a locally defined area and determining the nature of the object based of a criteria.
Basic Data to Budget
Initial conditions of Launch vehicle, Mission orbit, Mission Duration, Orbit maintenance, Drag parameters, Orbit Requirements, Final conditions.
Corona layer
Upper atmosphere of sun extends several solar radii and emits X-Rays
General SSA Process
Source-Sense-Process-Initial estimation-Precise estimate
space debris
the various types of man-made space junk that are in orbit around Earth (Inactive Satellites, Rocket Bodies, Debris.
Advantages of single satellite
Less resources, single power system, single launch orbit.
Active tracking
2 way communication between satellite and its operator.
solar wind
Flow of Plasma expelled at high velocity's from sun and is formed at outermost layer of sun.
Optic SSA Process
Nature-Camera-Observe and Image process-Tracklet Association-Angle-only OD
GEO
Geostationary Earth Orbit Telecommunication Satellites.
GTO
Geostationary Transit Orbit Rocket Bodies
Kessler Syndrome
More debris create more debris
Earth Reference Orbit
Operational Orbit provides coverage of the earth or near earth space.
parking orbit
a temporary orbit where the spacecraft stays until transferring to its final mission orbit