IR sensor on F 22?

This is an interesting AvLeak article covering the recent exercise in Alaska.
(http://aviationnow.com/avnow/news/channel_defense_story.jsp?id=news/aw010807p1.xml)

While it wasn’t part of a hard-turning furball, an F-22–with its Amraams and Sidewinders expended–slipped into visual range behind an F-16 and undetected made a simulated kill with its cannon during the stealth fighter’s first large-scale exercise and deployment outside the continental U.S.

Those and other revelations about the F-22’s emerging capabilities are increasingly important as the first combat unit, the U.S. Air Force’s 27th Fighter Sqdn., begins its initial Air Expeditionary Force deployment this month to an undisclosed site. And the first F-22 unit, the 94th Fighter Sqdn., will participate in Red Flag in February.

The gun kill is a capability Air Force planners hope their F-22s won’t use. The fighter is designed to destroy a foe well beyond his visual and radar range. Within visual-range combat and, in particular, gun kills are anachronisms. In amassing 144 kills to no losses during the first week of the joint-service Northern Edge exercise in Alaska last summer, only three air-to-air “kills” were in the visual arena–two involving AIM-9 Sidewinders and one the F-22’s cannon.

The 27th Fighter Sqdn. aircraft–on deployment from Langley AFB, Va.–didn’t get to show off their J-Turn and Cobra maneuvers or their high-angle-of-attack, high-off-boresight (which actually will arrive with the AIM-9X) and unique nose-pointing capabilities. The reason, those involved say, was because the victims of the three encounters, flying conventional fighters, never had a clue they were being stalked by F-22s until they were “killed.”

Raptor pilots agree that their preferred location for the fighter while in the battlespace is at high altitude, well above the other fighters, where they can adopt a fuel-efficient cruise, sweeping both the air and ground with radar and electronic surveillance for targets. From a superior altitude, the F-22 used sustained supercruise to range across hundreds of miles of airspace before an enemy fighter could threaten friendly high-value surveillance, command-and-control and tanker aircraft.

Perhaps the most important revelation by the 27th Fighter Sqdn. was demonstrating the F-22’s ability to use its sensors to identify and target enemy aircraft for conventional fighters by providing information so they could engage the enemy sooner than they could on their own. Because of the advanced situational awareness they afford, F-22s would stick around after using up their weapons to continue providing targets and IDs to the conventional fighters.

“We always left F-22s on station to help, but we didn’t designate any one aircraft to provide data,” says Lt. Col. Wade Tolliver, the unit’s commander. “It was critical that every F-22 out there provided all the data he had.”

With its high-resolution radar, the F-22 can guarantee target altitudes to within a couple of hundred feet. Its ability to identify an aircraft is “sometimes many times quicker than the AWACS,” he says. “It was a combination of high-resolution sensors and being closer to the targets.”

The F-22’s radar range is described only as being more than 100 mi. However, it’s thought to be closer to 125-150 mi., which is much farther than the standard F-15’s 56-mi. radar range. New, active electronically scanned radar technology–optimized for digital throughput–is expected to soon push next-generation radar ranges, in narrow beams, out to 250 mi. or more.

Raptor pilots had all the available data on the airspace fused and displayed on a single, easy-to-read screen.

“When I look down at my scope and put my cursor over a [friendly] F-15 or F/A-18, it tells me who they are locked on to,” he says. For example, “I could help them out by saying, ‘You’re double-targeted and there’s a group over here untargeted’ . . . to make sure we got everybody.” F-15 targets will be latent because of the radar sweep

In addition to AWACS, the F-22 also can feed data to the RC-135 Rivet Joint signals intelligence aircraft to improve situational awareness of the battlespace.

“If a Rivet Joint is trying to get triangulation [on a precise emitter location], he can get more [voice] information” from an F-22, Keys says. “If an AWACS sees a heavy group 40 mi. to the north, Raptor can come up and say it’s two F-18s, two F-15s and four F-16s.”

The F-22’s Mach 1.5 supercruise capability also got a workout in Alaska. Because only eight F-22s were ever airborne at once during the exercise, four of them were constantly involved in refueling from tankers flying orbits 150 mi. away. Supercruise got the fighters there and back quickly. On station, the fighter would conserve fuel by cruising at high altitude.

“We also used supercruise quite a bit because the fight was on such a large scale,” Tolliver says. “The airspace was roughly 120 mi. by 140 mi. We could sit up at high altitude and save our gas and watch. We don’t hang out at Mach 1.5. With our acceleration, when we saw the threats building, because we could see them so far out, we’d dump the nose over, light the burners and we were right up to fighting speed.”

During a typical day in the Alaska “war,” 24 air-to-air fighters, including up to eight F-22s, defended their aerial assets and homeland for 2.5 hr. Air Force F-15s and F-16s and Marine F/A-18s simulated up to 40 MiG-29s, Su-22s, Su-24s, Su-27s and Su-30s (which regenerated into 103 enemy sorties in a single period). They carried AA-10s A to F, Archers, AA-12 Adders and the Chinese-built PL-12. These were supported by SA-6, SA-10 and SA-20 surface to air missiles and an EA-6B for jamming. Each day, the red air became stronger and carried more capability.

As a result of all the emitters in the battlespace, the F-22’s ability to map the electronic order of battle (EOB)–what’s emitting and from where–proved critical.

“I love intel, but it’s only as good as the last time [analysts] got a data update, which could have been hours or even a day earlier,” Tolliver says. An F-22 “gets rid of the time delay. I can plot an EOB in real time. I’m not saying we’re better than a Rivet Joint, but I can go places that it can’t. If he’s 150 mi. away, he’s probably not going to be able to plot a high-fidelity threat location as quickly as I can.”

The adversaries were wily and didn’t want to lose.

“We had guys running in at 500 ft. off the deck,” Tolliver says. “We had guys flying in at 45,000-50,000 ft. doing Mach 1.6, trying to shoot me before I know they are there. They would mass their forces and try to win with sheer numbers. None of it worked.”

A tactic used by the F-22s was actually developed and practiced in smaller scale at Langley before the exercise. Raptors worked in pairs, integrated with F-15Cs or F/A-18E/Fs.

“I could help target for them from behind and above,” Tolliver says. “We really don’t have a name for what we were doing other than integrated ops. I was able to look down and smartly target F-15s or F/A-18s to groups at ranges where they could not yet [detect] the target.”

The next step will be to pass the detailed information about surface-to-air missile locations, capabilities and emission details (called parametrics).

“If I have characterized, say an SA-10, I can send it verbally to AWACS and they can send it out to other platforms,” says Maj. Shawn Anger, an F-22 instructor with the 43rd Fighter Sqdn. at Tyndall AFB, Fla. However, “I can’t pass the parametrics characterization. Hopefully, we’ll be able to shoot it up the radar”–a new capability for the radar, which is being developed to send large, high-bandwidth imagery files.

However, the most intriguing declaration is this one:

Moreover, Keys says, modifications are underway to transmit additional target parameters–such as sensitive, high-resolution infrared data–from the F-22 with a low-probability-of-intercept data link.

I know that an advanced IRST was supposed to equip the f 22, but AFAIK it was discarded. Also, from the declaration it results that it would be an A-G sensor, not A-A.

Any opinion?