5
General information
The Meinberg satellite receiver clocks of the GPS164xHS series are available with
several options. This manual describes the following models:
C
D
V
2
7
.
.
.
9
1
C
A
V
0
4
2
.
.
.
0
0
1
C
D
V
0
4
2
.
.
.
0
0
1
s
t
u
p
t
u
o
r
e
l
p
u
o
c
o
t
p
o
s
t
u
p
t
u
o
y
a
l
e
r
S
O
M
o
t
o
h
P
S
H
D
4
6
1
S
P
G
X
X
S
H
A
4
6
1
S
P
G
X
X
S
H
A
D
4
6
1
S
P
G
X
X
X
S
H
D
/
Q
A
/
4
6
1
S
P
G
X
X
S
H
A
/
Q
A
/
4
6
1
S
P
G
X
X
S
H
A
D
/
Q
A
/
4
6
1
S
P
G
X
X
X
The vaiants differ in power supply and the type of DC-isolation of the programmable
pulse outputs. The differences are described in the relevant chapters, the name
GPS164xHS is used whenever common features of all types of clocks are specified.
The satellite receiver clock GPS164xHS has been designed to provide an extremly
precise time reference for the generation of programmable pulses. High precision
available 24 hours a day around the whole world is the main feature of the new
system which receives it's information from the satellites of the Global Positioning
System.
The Global Positioning System (GPS) is a satellite-based radio-positioning, navi-
gation, and time-transfer system. It was installed by the United States Departement
of Defense and provides two levels of accuracy: The Standard Positioning Service
(SPS) and the Precise Positioning Service (PPS). While PPS is encrypted and only
available for authorized (military) users, SPS has been made available to the general
public.
GPS is based on accurately measuring the propagation time of signals transmitted
from satellites to the user´s receiver. A nominal constellation of 21 satellites together
with 3 active spares in six orbital planes 20000 km over ground provides a minimum
of four satellites to be in view 24 hours a day at every point of the globe. Four
satellites need to be received simultaneously if both receiver position (x, y, z) and
receiver clock offset from GPS system time must be computed. All the satellites are
monitored by control stations which determine the exact orbit parameters as well as
the clock offset of the satellites´ on-board atomic clocks. These parameters are
uploaded to the satellites and become part of a navigation message which is retrans-
mitted by the satellites in order to pass that information to the user´s receiver.
The high precision orbit parameters of a satellite are called ephemeris parameters
whereas a reduced precision subset of the ephemeris parameters is called a satellite´s
almanac. While ephemeris parameters must be evaluated to compute the receiver´s
position and clock offset, almanac parameters are used to check which satellites are
in view from a given receiver position at a given time. Each satellite transmits its
own set of ephemeris parameters and almanac parameters of all existing satellites.
Содержание GPS164/AQ/AHS
Страница 1: ...GPS164xHS GPS164 AQ xHS Technical Information Operating Instructions...
Страница 6: ...6 6 Block diagram GPS164xHS...
Страница 11: ...11 IRIG standard format...
Страница 12: ...12 AFNOR time code format...
Страница 25: ...25 Assembly with CN UB E CN UB 280DC...
Страница 34: ......
