Page 247 - Intro to Space Sciences Spacecraft Applications

Introduction to Space Sciences and Spacecraft Applications
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OAO, 18 Periapsis, 29, 31
Oberth, Hermann, 3,54 Perigee, 33
Omega, 163 Perigee kick motor (PKM), 7 1
Omnidirectional antennas, 189 Phase, 80, 105
On-orbit mass, 187, 188 Phase difference positioning, 159
Onboard computer subsystem, 190 Phase modulation, 1 17
Onboard recorders, 188 Phase shift keying, 127
Onboard recording, 189 Photodissociation, 89
Open orbits, 30 Photoionization, 88
Operational configuration, 191 Photosphere, 77,79
Operations phase (Phase E), 209 Picture element (pixel), 138
Optimization, 203 Pioneer, 16
Orbit Pitch, roll, and yaw, 174
adjustment, 70 Planck’s law, 82
establishment, 47 Plane change, 71
maintenance, 186,190 Planning period, 200
properties, 39 Pointing accuracy, 169, 172
Orbital Polar orbit, 45
altitude, 37 Polarization, 142
elements, 38 Power
maneuvers, 48 budget, 111
parameters, 28 control unit, 181
period, 32 management, 190
radius, 30 profiles, 166
translation, 186 regulation, 18 1
velocity, 36 Preliminary design review (PDR), 207
OSO, 16 Pressure thrust, 62
Outgassing, 99 Pro-grade orbit, 68
Overexpansion, 62 Programmatic, 204
Ozone depletion, 134 Proof-of-concept, 134
Propagation velocity, 142
Parabolic dish antenna, 110 Propellant mass flow rate, 57
Parabolic orbit, 30 Propellants, 60, 185
Parking orbit, 186 Pulse length, 146
Passive sensor, 133 Pulse ranging, 146, 154, 159
Payload, 166 Pushbroom scan, 140
management, 190
specialist, 205 Q-levels, 12 1
support dynamics, 19 1 Quality assurance, 204
Payload Assist Module (PAM), 194 Quantization, 121
Pegasus XL, 171 Radar, 133
Perfect expansion, 63 Radians, 146