Form 9.B Project Summary

Chron:

971074

Proposal

Number:

04.02-2200a

Project Title:

A MULTI-SPECTRAL AIRBORNE

RADIOMETER FOR RANGE

RESOLVED HIGH-ALTITUDE AIR

TEMPERATURE MEASUREMENTS

Technical Abstract (Limit 200 words)

Precise air temperature measurements currently

can not be made from high-speed aircraft. We

propose to solve this problem by using a

remote-sensing radiometer. The High-altitude Air

Temperature Radiometer (HATR) will operate in

the 15um CO2 absorption band, near the peak of

the thermal emission for stratospheric air

temperatures. This wavelength region has not been

used for commercialradiometers but has been

explored at Ophir. Using multispectral polarization

modulation and detection techniques, combined with

Ophir's experience and innovations in radiometer

design, we will minimize errors from housing and

window thermal radiance thereby permitting

accurate air temperature measurements on high

speed/high altitude aircraft such as the High Speed

Civil Transport. The unique design will enable the

radiometer to measure true air temperature out of

aircraft traveling at Mach 2.4 at altitudes up to

20km with 0.3C precision, corresponding to a Mach

number uncertainty of 0.002. These air temperature

measurements will be needed for precise control

ofsupersonic engine operation to maximize fuel

efficiency. A multiple wavelength design will allow

prediction of upcoming air temperature variations

to prevent engine unstarts.

Potential Commercial Applications (Limit 200 words)

Potential Commercial Applications

The proposed radiometer will enable accurate air

temperature measurements from high-speed

aircraft and could become an important component

of the HSCT program. In addition, range-resolved

temperature measurements will warn of potential

engine unstart conditions.

The proposed radiometer may find an immediate

market on commercial aircraft providing warning of,

and possibly permitting avoidance of, clear air

turbulence. Additionally, it may allow detection of

approaching icing conditions.

Name and Address of Principal Investigator (Name,

Organization Name, Mail Address, City/State/Zip)

Dr. Stuart P. Beaton

OPHIR Corporation

10184 West Belleview Avenue, Suite 200

Littleton , CO 80127

Name and Address of Offeror (Firm Name, Mail Address,

City/State/Zip)

Mr. James F. Miller

OPHIR Corporation

10184 West Belleview Avenue, Suite 200

Littleton , CO 80127