Question about the F-22 and it's radar.

In message , Kevin Brooks
writes
"Paul J. Adam" wrote in message
...
"In service" or "in development and undergoing testing"?

JDAM did not begin being delivered for testing purposes until 1997, from
what I have read in a couple of sources; the program was not started until
1992.

It absorbed various Navy and USAF projects like GAM and IAM, however
(GAM was flying captive-carry in 1989, IIRC)

--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBoxatjrwlynch[dot]demon{dot}co(.)uk

"Paul J. Adam" wrote in message
...
In message , Kevin Brooks
writes
"Paul J. Adam" wrote in message
...
"In service" or "in development and undergoing testing"?

JDAM did not begin being delivered for testing purposes until 1997, from
what I have read in a couple of sources; the program was not started
until
1992.

It absorbed various Navy and USAF projects like GAM and IAM, however
(GAM was flying captive-carry in 1989, IIRC)

Odd--nothing I have found via Google indicates GAM being around (in any
form) before about 1996 at the earliest, and IIRC 1998 was when it was
introduced to the B-2 force.

Brooks

In message , Kevin Brooks
writes
"Paul J. Adam" wrote in message
...
It absorbed various Navy and USAF projects like GAM and IAM, however
(GAM was flying captive-carry in 1989, IIRC)

Odd--nothing I have found via Google indicates GAM being around (in any
form) before about 1996 at the earliest, and IIRC 1998 was when it was
introduced to the B-2 force.

AIWS kicked off in March 1987: IAM went public in 1988 and in 1991
Friedman was speculating about how its accuracy could be improved if GPS
were used as a complement to inertial guidance. (IAM, not GAM, was
flying before 1991 - my mistake)

IAM definitely wants a good targeting sensor, though: GPS will fly to a
gridref, IAM didn't care where 'here' or 'there' is but started from
launch and went where it was told. Less dependence on satellite
navigation, but much more need for the launch aircraft to tell the
weapon "you are now HERE, and your target is HERE+INCREMENT, go kill!".

--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBoxatjrwlynch[dot]demon{dot}co(.)uk

"Paul J. Adam" wrote in message
...
In message , Kevin Brooks
writes
"Paul J. Adam" wrote in message
...
It absorbed various Navy and USAF projects like GAM and IAM, however
(GAM was flying captive-carry in 1989, IIRC)

Odd--nothing I have found via Google indicates GAM being around (in any
form) before about 1996 at the earliest, and IIRC 1998 was when it was
introduced to the B-2 force.

AIWS kicked off in March 1987: IAM went public in 1988 and in 1991
Friedman was speculating about how its accuracy could be improved if GPS
were used as a complement to inertial guidance. (IAM, not GAM, was
flying before 1991 - my mistake)

IAM definitely wants a good targeting sensor, though: GPS will fly to a
gridref, IAM didn't care where 'here' or 'there' is but started from
launch and went where it was told. Less dependence on satellite
navigation, but much more need for the launch aircraft to tell the
weapon "you are now HERE, and your target is HERE+INCREMENT, go kill!".

So we are back to the fact that we have not seen any GPS guided rounds
(minus that SLAM sort-of-GPS-guided-but-with-a-separate-terminal-seeker)
flying around until the latter part of the nineties.

Brooks


--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBoxatjrwlynch[dot]demon{dot}co(.)uk

In message , Kevin Brooks
writes
"Paul J. Adam" wrote in message
...
AIWS kicked off in March 1987: IAM went public in 1988 and in 1991
Friedman was speculating about how its accuracy could be improved if GPS
were used as a complement to inertial guidance. (IAM, not GAM, was
flying before 1991 - my mistake)

So we are back to the fact that we have not seen any GPS guided rounds
(minus that SLAM sort-of-GPS-guided-but-with-a-separate-terminal-seeker)
flying around until the latter part of the nineties.

Fielded in 1996 (GAM) and production hardware delivered in 1998 (JDAM)
means flying for a few years before that.

Flight trials of the GPS Guidance Package for JDAM started in 1993 as
far as I can tell (INTEGRATED INS/GPS TAKES OFF IN THE US, INTERNATIONAL
DEFENSE REVIEW, February 1993)


--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBoxatjrwlynch[dot]demon{dot}co(.)uk

"Paul J. Adam" wrote in message
...
In message , Kevin Brooks
writes
"Paul J. Adam" wrote in message
...
AIWS kicked off in March 1987: IAM went public in 1988 and in 1991
Friedman was speculating about how its accuracy could be improved if
GPS
were used as a complement to inertial guidance. (IAM, not GAM, was
flying before 1991 - my mistake)

So we are back to the fact that we have not seen any GPS guided rounds
(minus that SLAM sort-of-GPS-guided-but-with-a-separate-terminal-seeker)
flying around until the latter part of the nineties.

Fielded in 1996 (GAM) and production hardware delivered in 1998 (JDAM)
means flying for a few years before that.

Flight trials of the GPS Guidance Package for JDAM started in 1993 as
far as I can tell (INTEGRATED INS/GPS TAKES OFF IN THE US, INTERNATIONAL
DEFENSE REVIEW, February 1993)

But gee, Paul, if you can't show, on the web, where there were by-golly
*release* trials, etc., at that time, then you have...nothing! They might as
well not exist! That is your argument elsewhere, right?

Brooks



--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBoxatjrwlynch[dot]demon{dot}co(.)uk

In message , Kevin Brooks
writes
"Paul J. Adam" wrote in message
...
Flight trials of the GPS Guidance Package for JDAM started in 1993 as
far as I can tell (INTEGRATED INS/GPS TAKES OFF IN THE US, INTERNATIONAL
DEFENSE REVIEW, February 1993)

But gee, Paul, if you can't show, on the web, where there were by-golly
*release* trials, etc., at that time, then you have...nothing! They might as
well not exist! That is your argument elsewhere, right?

No.

Development of a weapon's sensor requires captive-carry flight early in
development, with carriage and release trials of the all-up round later.
The contention was that GPS-aided weapons weren't flying until late last
decade: in fact development work and flight trials of the guidance unit
started about five years before that, leading to fielded weapons by 1997
or so.

However, integration of a weapon onto an aircraft isn't complete until
you've demonstrated fit, function and safe separation, and got whoever
your equivalent of DOSG is to certify it fit for live carriage.

Different discussions, different criteria.


At this rate I'm going to have to charge you for lessons.




--
When you have to kill a man, it costs nothing to be polite.
W S Churchill

Paul J. Adam MainBoxatjrwlynch[dot]demon{dot}co(.)uk