Department of Climate and Space Sciences and Engineering in the College of Engineering at the University of Michigan


Animated Assembly Procedure for the Local Oscillator (LO) and Noise Diode (ND) Calibration units of the Hurricane Imaging Radiometer (HIRad)

Posted: June 3, 2010

HIRad is a new type of remote sensing instrument developed at NASA Marshall Space Flight Center in conjunction with the Space Physics Research Laboratory that combines multi-frequency observation with Synthetic Thinned Array Radiometer technology. HIRad makes maps of the hurricane rain rate and the wind speed at the ocean surface, critical information for predicting changes in hurricane intensity.

Because of the sensitivity of the instrument, the LO and ND assemblies utilize custom designed seamless aluminum boxes and EMI (ElectroMagnetic Interference) gasketing which provide electromagnetic isolation between the two units that exceeds eleven orders of magnitude (110dB).

For more information about the Hurricane Imaging Radiometer, visit

Further reading is available at

For more information about the Space Physics Research Laboratory, visit

MOVIE CREDIT: Ronald Rizor, Electrical/Mechanical Designer, at the University of Michigan, Department of Atmospheric, Oceanic, and Space Sciences

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