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General Description:

Model 13000 Broadband Radiometer

Sensor/Telescope

The Model 13000 IR Sensor/Telescope

Assembly is designed for use as the primary

sensing element in an Earth Resource

Monitoring System such as the Clouds and

Earth Radiant Energy System which will be

flown aboard NASA's Earth Observing System

spacecraft of the AM and PM series as well as

the Tropical Rainfall Measurement Mission

(TRMM-1).  The telescope is capable of broad

spectral sensitivity and has a very large radiance dynamic range.  

Specifications

Spectra Response:           0.2 to 50 microns

Clear Aperture:               18mm dia.

Telescope Focal Ratio:   1.84

Field of View:                 Truncated diamond: 1.30 x 2.60

Detector:                         Uncooled Thermistor Bolometer

Detector Active Area:     1.53mm x 1.53mm

Time Constant:               9 msec.

Noise Equiv. Irradiance:   0.05W/(m2*sr) at optimum bias @ operating temperature =380C

The unit consists of three major subassemblies (1) Cassegrain telescope (2) Baffle for stray

light and (3) detector assembly consisting of an active and compensating element.    

Radiation enters the unit through the baffle, passes through the telescope and is imaged

onto the IR detector.

Optional filters can be supplied to provide specific wavelength selectivity up to 150

microns.