C-Nav 2050M, Руководство пользователя

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C-Nav2050 User Guide
Integer-cycle Ambiguity is the unknown number of
whole carrier cycles between the satellite and the
receiver.
Ionosphere is the region of the earth’s atmosphere
between the stratosphere and the exosphere
approximately 50 to 250 miles above the earth’s
Ionosphe
surface
ric Refraction Delay is a delay in the
icates the issue
ng any change in the
e
r looks
e the effects of the noise and get a
nt
e
with two phases: predict
m a
e in the L-band range.
tellite data. The
propagation of the GPS signal caused by the signal
traveling through the ionosphere.
Issue of Data, Clock (IODC) ind
number of the data set and thereby provides the user
with a convenient means of detecti
correction parameters. The transmitted IODC will b
different from any value transmitted by the satellite
during the preceding seven days.
Kalman Filtering is a linear system in which the mean
squared error between the desired output and the
actual output is minimized when the input is a random
signal generated by white noise. The Kalman filte
at a target to remov
good estimate of the location of the target at the prese
time (filtering), at a future time (prediction), or at a tim
in the past (interpolation or smoothing). The Kalman
filter is a recursive estimator
and update. The predict phase uses the estimate fro
previous state to produce an estimate of the current
state. The update phase uses the current state
measurements to arrive at a new more accurate
estimate.
L-band is the group of radio frequencies extending from
approximately 400MHz to approximately 1600MHz. The
GPS carrier frequencies L1 (1575.4MHz) and L2
(1227.6 MHz) ar
L1 carrier frequency is the primary L-band carrier used
by GPS satellites to transmit sa
G-16