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See also
Mobile satellite
redundancy scheme, 223
See also
Redundancy switching
communications
Index
443
Satellite networks
integration with terrestrial networks,
14–15
architectures, 69–106
overall, 20
circuit-switched services, 75–77
space segment, 15–17
connectivity, 69
Satellite systems engineering, 389–426
data communications and protocols,
elements, 390–91
85–88
fixed satellite systems and services,
dedicated bandwidth services, 71–75
392–93
expansion of, 79
mobile satellite systems and services,
features, 69–88
393
flexibility features, 78–81
premise, 389
implementation of, 78–79
principles, 389–93
new services introduction, 80–81
SIMILAR process, 390
packet-switched services, 77–78
SatMax, 53
point-to-multipoint, 88–104
SatMex, 60
point-to-point, 104–5
S-band, 27–30
quality features/issues, 82–88
Scrambling, 163–64
routing simplification, 79–80
Security risks, 162–63
signal reproduction, 82–83
Semiconductor Laser Intersatellite Link
voice quality and echo, 83–85
Experiment (SILEX), 36–38
VSAT, 105–6
Sensors, 264–65
Satellite news gathering (SNG) vehicles,
Serial Data Interface (SDI), 311
92, 297
Service-level agreement (SLA), 369
Satellites
SES, 50–51
backup, 364–65
Astra GEO satellites, 9
change axes, 266
defined, 51
characteristics, 1–14
Ku-band GEO satellites, 51
fiber optics versus, 420
Shielding, 32
GEO, 1–3
Shipboard Earth station, 298
Globalstar, 259–60
Sidelobes, antenna, 116–17
hybrid, 45–46
Signal reproduction, 82–83
INTELSAT, 44
SIMILAR process, 390
LEO, 3
Simple Network Management Protocol
non-GEO, 2–4
(SNMP), 375
reliability, 81–82
Single-carrier IMD, 188–89
replacement, 364–65
Solar cells/panels, 268–71
SATCOM (WGS), 67–68
geometrical factors, 270
tracking and ranging, 281–82
illumination, 269
See also specific satellites
Iridium satellites, 269
Satellite systems
vertical string connections, 268
development methodology, 395–98
See also
Spacecraft bus subsystem
economic principles, 393–95
Solid rocket motors (SRMs), 279–80,
elements, 15–20
350–51
evaluation, 393
Solid-state power amplifiers (SSPAs),
ground segment, 17–20
138, 139, 232–34
defined, 232
implementation, 397
444
Index
Solid-state power amplifiers (SSPAs)
Space segment economics, 398–407
(continued)
annual costs, 405–7
efficiency, 234
equipment operations and
Ka-band, 232
maintenance, 406
Ku-band, 232
in-orbit insurance, 406
nonlinear property, 235
investment cost elements, 401–5
versions, 233
launch and transfer stage, 403–4
Spacecraft
launch insurance, 404
antennas, 237–56
major elements, 399
bent-pipe transponder filtering, 204–5
management and marketing, 406–7
bus, 195
satellite operations, 405–6
command system, 284–85
spacecraft, 401–3
communications payload, 195
TT&C ground facilities, 400, 404–5
complexity, power, and mass, 260
See also
Economics
configuration, 260–62
Spaceway satellite, 66, 255–56
defined, 195
Splash plate, 301
economics, 401–3
Spoofing, 86
EIRP, 199–203
Spreading factor, 114
engineering, 384
S switch, 220–21
frequency translation effects, 206–7
Standard GEO transponder services,
G/T, 203–4
376–79
linearity, 205–6
Earth station qualification, 376
mission summary, 257–60
internal communication, 379
MSS, 213
network operation facilities
overall payload requirements, 198–99
requirements, 376
overview, 195–207
telephone, fax, and e-mail, 378
telemetry system, 282–84
transmission monitoring, 377–78
three-axis configuration, 196, 260–61
Star tracking, 264
zero momentum bias, 261
Statistical multiplexing, 74
Spacecraft bus subsystems, 262–69
Structural arrangements, three-axis
attitude-control, 262–68
spacecraft, 289
battery design and configuration,
Structure porteuse externe lancements
271–74
triples Ariane (Speltra), 353
electric and ion propulsion, 278–79
Super high frequency (SHF) bands, 24
liquid propulsion system, 274–78
Surface acoustic wave (SAW) filters, 224
solar cells and panels, 268–71
solid-fuel rocket motors, 279–80
Synchronous digital hierarchy (SDH), 73,
structural arrangements, 289
153, 310–11
thermal control, 286–88
interface, 311
TT&C, 280–86
SDH-1, 311
Space platforms, 13–14
Synchronous optical network (SONET),
Space segment, 15–17
73, 153, 311
illustrated elements, 15
SYNCOM, 40–41, 83
Iridium, 63
optimizing, 418–19
T
SCC, 16, 17
Tail connections, 293
TT&C stations, 16–17
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