Global Positioning System Reference
In-Depth Information
stellation has up to seven orbital slots unevenly spaced around each plane, with
some satellites in relatively close proximity to provide redundant coverage for
near-term predicted failures. Since the state of the constellation varies, the Internet is
the best source for current status information. One such Web site is operated and
maintained by the U.S. Coast Guard Navigation Center [3].
3.2.3.2 Navigation Payload Overview
The navigation payload is responsible for the generation and transmission of rang-
ing codes and navigation data on the L1, L2, and (starting with Block IIF) L5 carrier
frequencies to the user segment. Control of the navigation payload is taken from
Table 3.2
Satellite Constellation Configuration (as of January 29, 2005)
Block/Launch
Order
PRN
Number
Orbital
Slot
SVN
Launch Date
II-5
17
17
December 11, 1989
D6
II-9
15
15
October 1, 1990
D5
IIA-11
24
24
July 4, 1991
D1
IIA-12
25
25
February 23, 1992
A2
IIA-14
26
26
July 7, 1992
F2
IIA-15
27
27
September 9, 1992
A4
IIA-16
01
32
November 22, 1992
F6
IIA-17
29
29
December 18, 1992
F5
IIA-19
31
31
March 30, 1993
C5
IIA-20
07
37
May 13, 1993
C4
lIIA-21
09
39
June 26, 1993
A1
IIA-22
05
35
August 30, 1993
B4
IIA-23
04
34
October 26, 1993
D4
IIA-24
06
36
March 10, 1994
C1
IIA-25
03
33
March 28, 1996
C2
IIA-26
10
40
July 16, 1996
E3
IIA-27
30
30
September 12, 1996
B2
IIA-28
08
38
November 6, 1997
A3
IIR-2
13
43
July 23, 1997
F3
IIR-3
11
46
October 7, 1999
D2
IIR-4
20
51
May 11, 2000
E1
IIR-5
28
44
July 16, 2000
B3
IIR-6
14
41
November 10, 2000
F1
IIR-7
18
54
January 30, 2001
E4
IIR-8
16
56
January 29, 2003
B1
IIR-9
21
45
March 31, 2003
D3
IIR-10
22
47
December 21, 2003
E2
IIR-11
19
59
March 20, 2004
C3
IIR-12
23
60
June 23, 2004
F4
IIR-13
02
61
November 6, 2004
D7
Search WWH ::
Custom Search