SF-2110 User Guide – Rev. A
provide a single set of real time global corrections for
the GPS satellites.
S/A
see
Selective Availability
.
SBAS
(Satellite Based Augmentation System)
this
is a more general term, which encompasses WAAS,
(S/A)
is the deliberate
contains
by
The SF-2110 is a single
e
™
equipped
making
mitted
wer spectral power density (Watts per
StarFire™ and EGNOS type corrections.
Selective Availability
degradation of the GPS signal by encrypting the P-
code and dithering the satellite clock. When the US
Department of Defense uses S/A, the signal
errors, which can cause positions to be inaccurate
as much as 100 meters.
Signal-to-Noise Ratio (SNR)
is a measure of a
satellite’s signal strength.
single-frequency
is a type of receiver that only uses
the L1 GPS signal. There is no compensation for
ionospheric effects.
frequency receiver.
SNR
see
signal-to-noise
Ratio
.
StarFire
™
a set of real-time global orbit and clock
corrections for GPS satellites. StarFir
receivers are capable of real-time decimeter
positioning
(see Appendix C).
Spread Spectrum Radio (SSR)
a radio that uses
wide band, noise like (pseudo-noise) signals that are
hard to detect, intercept, jam, or demodulate
any data transmitted secure. Because spread
spectrum signals are so wide, they can be trans
at much lo
Hertz), than narrow band signals.
SV (Space Vehicle)
a
GPS
satellite.
Glossary-91
Summary of Contents for SF-2110
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