FOV field of view—determines times in which orbiting satellites fly through a ground-based observer’s conical field of view; can be defined by a constant azimuth and elevation, a constant right ascension and declination, or as a line of sight to another satellite; uses both SGP4 and SP for generation of ephemerides
FRD Functional Requirements Document
GEO geostationary orbit
GITM Global Ionosphere-Thermosphere Model
GP general perturbations
GSFC Goddard Space Flight Center
HASDM High Accuracy Satellite Drag Model
HEO highly elliptical orbit
ICD Initial Capabilities Document
IEEE Institute of Electrical and Electronics Engineers
IOMOD astrodynamics algorithm that computes an initial set of orbital elements from three observations
IR infrared
ITAR International Traffic in Arms Regulations
J70 Jacchia 1970 empirical model of thermospheric density
JB2008 Jacchia-Bowman 2008 empirical model of thermospheric density
JCD Joint Capabilities Document
JMS JSpOC Mission System
JSpOC Joint Space Operations Center
LAMOD astrodynamics algorithm that computes sensors’ (ground- or space-based) viewing opportunities (so-called look angles) for Earth-centered satellites; uses both SGP4 and SP for generation of ephemerides
MDA Missile Defense Agency
MHT multiple hypothesis tracking
MIT Massachusetts Institute of Technology
MSIS Mass Spectrometer Incoherent Scatter radar—series of models describing atmospheric temperature, composition, and density
NASA National Aeronautics and Space Administration
NOAA National Oceanic and Atmospheric Administration
NORAD North American Aerospace Defense Command
NRLMSISE-00 Naval Research Laboratory Mass Spectrometer Incoherent Scatter radar Extended—empirical model of atmospheric temperature, composition, and density, released in 2000
NRO National Reconnaissance Office
OCM orbital conjunction message
ROTAS Report/Observation Association—associates observations against satellite element sets
RSO resident space object


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